/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 SingleStatement --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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 19:25:36,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 19:25:36,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 19:25:36,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 19:25:36,734 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 19:25:36,736 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 19:25:36,744 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 19:25:36,747 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 19:25:36,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 19:25:36,750 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 19:25:36,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 19:25:36,753 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 19:25:36,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 19:25:36,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 19:25:36,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 19:25:36,761 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 19:25:36,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 19:25:36,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 19:25:36,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 19:25:36,771 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 19:25:36,776 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 19:25:36,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 19:25:36,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 19:25:36,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 19:25:36,791 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 19:25:36,791 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 19:25:36,791 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 19:25:36,792 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 19:25:36,797 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 19:25:36,798 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-24 19:25:36,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 19:25:36,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 19:25:36,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 19:25:36,810 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 [2020-09-24 19:25:36,864 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 19:25:36,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 19:25:36,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 19:25:36,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 19:25:36,866 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 19:25:36,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 19:25:36,868 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 19:25:36,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 19:25:36,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 19:25:36,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 19:25:36,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 19:25:36,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 19:25:36,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 19:25:36,871 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 19:25:36,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 19:25:36,871 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 19:25:36,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 19:25:36,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 19:25:36,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 19:25:36,872 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 19:25:36,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 19:25:36,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:25:36,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 19:25:36,872 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 19:25:36,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 19:25:36,873 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 19:25:36,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 19:25:36,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 19:25:36,873 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 19:25:36,874 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 -> SingleStatement 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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 19:25:37,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 19:25:37,351 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 19:25:37,355 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 19:25:37,357 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 19:25:37,358 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 19:25:37,359 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label38.c [2020-09-24 19:25:37,444 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/95e99e969/02e0839fc016479d85242a00b530dea8/FLAGce8155012 [2020-09-24 19:25:38,112 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 19:25:38,113 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label38.c [2020-09-24 19:25:38,129 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/95e99e969/02e0839fc016479d85242a00b530dea8/FLAGce8155012 [2020-09-24 19:25:38,321 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/95e99e969/02e0839fc016479d85242a00b530dea8 [2020-09-24 19:25:38,338 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 19:25:38,345 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 19:25:38,348 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 19:25:38,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 19:25:38,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 19:25:38,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:25:38" (1/1) ... [2020-09-24 19:25:38,359 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74dd283d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:25:38, skipping insertion in model container [2020-09-24 19:25:38,359 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:25:38" (1/1) ... [2020-09-24 19:25:38,369 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 19:25:38,427 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 19:25:39,004 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:25:39,011 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 19:25:39,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:25:39,139 INFO L208 MainTranslator]: Completed translation [2020-09-24 19:25:39,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:25:39 WrapperNode [2020-09-24 19:25:39,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 19:25:39,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 19:25:39,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 19:25:39,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 19:25:39,157 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:25:39" (1/1) ... [2020-09-24 19:25:39,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:25:39" (1/1) ... [2020-09-24 19:25:39,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:25:39" (1/1) ... [2020-09-24 19:25:39,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:25:39" (1/1) ... [2020-09-24 19:25:39,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:25:39" (1/1) ... [2020-09-24 19:25:39,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:25:39" (1/1) ... [2020-09-24 19:25:39,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:25:39" (1/1) ... [2020-09-24 19:25:39,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 19:25:39,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 19:25:39,250 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 19:25:39,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 19:25:39,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:25:39" (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 [2020-09-24 19:25:39,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 19:25:39,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 19:25:39,355 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 19:25:39,356 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 19:25:39,356 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 19:25:39,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 19:25:39,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 19:25:39,356 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 19:25:39,357 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 19:25:39,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 19:25:39,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 19:25:40,823 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 19:25:40,824 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 19:25:40,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:25:40 BoogieIcfgContainer [2020-09-24 19:25:40,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 19:25:40,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 19:25:40,845 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 19:25:40,850 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 19:25:40,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:25:38" (1/3) ... [2020-09-24 19:25:40,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53c59083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:25:40, skipping insertion in model container [2020-09-24 19:25:40,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:25:39" (2/3) ... [2020-09-24 19:25:40,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53c59083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:25:40, skipping insertion in model container [2020-09-24 19:25:40,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:25:40" (3/3) ... [2020-09-24 19:25:40,856 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label38.c [2020-09-24 19:25:40,871 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 19:25:40,889 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 19:25:40,917 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 19:25:40,969 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 19:25:40,969 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 19:25:40,969 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 19:25:40,969 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 19:25:40,970 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 19:25:40,970 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 19:25:40,970 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 19:25:40,970 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 19:25:41,005 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-24 19:25:41,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-09-24 19:25:41,025 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:25:41,026 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:25:41,027 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:25:41,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:25:41,036 INFO L82 PathProgramCache]: Analyzing trace with hash -857113145, now seen corresponding path program 1 times [2020-09-24 19:25:41,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:25:41,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180274116] [2020-09-24 19:25:41,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:25:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:25:41,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:41,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:42,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:25:42,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-09-24 19:25:42,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:25:42,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1023 [2020-09-24 19:25:42,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:25:42,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:25:42,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 19:25:42,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-09-24 19:25:42,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 19:25:42,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:25:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:25:42,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:42,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:25:42,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 19:25:42,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:25:42,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-24 19:25:42,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:25:42,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:25:42,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:25:42,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 19:25:42,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:25:42,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:25:42,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180274116] [2020-09-24 19:25:42,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:25:42,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 19:25:42,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432193638] [2020-09-24 19:25:42,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:25:42,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:25:42,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:25:42,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:25:42,735 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 4 states. [2020-09-24 19:25:45,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:25:45,103 INFO L93 Difference]: Finished difference Result 1212 states and 1611 transitions. [2020-09-24 19:25:45,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 19:25:45,105 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 110 [2020-09-24 19:25:45,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:25:45,130 INFO L225 Difference]: With dead ends: 1212 [2020-09-24 19:25:45,131 INFO L226 Difference]: Without dead ends: 638 [2020-09-24 19:25:45,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:25:45,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2020-09-24 19:25:45,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 603. [2020-09-24 19:25:45,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-09-24 19:25:45,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 719 transitions. [2020-09-24 19:25:45,255 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 719 transitions. Word has length 110 [2020-09-24 19:25:45,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:25:45,256 INFO L479 AbstractCegarLoop]: Abstraction has 603 states and 719 transitions. [2020-09-24 19:25:45,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 19:25:45,256 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 719 transitions. [2020-09-24 19:25:45,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-24 19:25:45,273 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:25:45,273 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 19:25:45,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 19:25:45,274 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:25:45,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:25:45,274 INFO L82 PathProgramCache]: Analyzing trace with hash 550881368, now seen corresponding path program 1 times [2020-09-24 19:25:45,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:25:45,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126895672] [2020-09-24 19:25:45,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:25:45,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:25:45,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:45,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:45,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:46,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:46,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:25:46,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-09-24 19:25:46,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:25:46,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1016 [2020-09-24 19:25:46,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:25:46,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:25:46,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 19:25:46,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-09-24 19:25:46,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:25:46,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:25:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:25:46,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:46,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:25:46,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 19:25:46,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:25:46,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 19:25:46,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:25:46,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:25:46,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:25:46,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:25:46,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-24 19:25:46,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 19:25:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:25:46,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:46,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:25:46,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 19:25:46,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:25:46,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-24 19:25:46,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:25:46,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:25:46,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:25:46,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 19:25:46,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-09-24 19:25:46,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:25:46,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126895672] [2020-09-24 19:25:46,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:25:46,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 19:25:46,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331326508] [2020-09-24 19:25:46,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:25:46,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:25:46,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:25:46,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:25:46,664 INFO L87 Difference]: Start difference. First operand 603 states and 719 transitions. Second operand 5 states. [2020-09-24 19:25:48,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:25:48,845 INFO L93 Difference]: Finished difference Result 1499 states and 1862 transitions. [2020-09-24 19:25:48,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:25:48,845 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2020-09-24 19:25:48,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:25:48,853 INFO L225 Difference]: With dead ends: 1499 [2020-09-24 19:25:48,853 INFO L226 Difference]: Without dead ends: 920 [2020-09-24 19:25:48,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:25:48,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2020-09-24 19:25:48,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 891. [2020-09-24 19:25:48,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 891 states. [2020-09-24 19:25:48,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1045 transitions. [2020-09-24 19:25:48,895 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1045 transitions. Word has length 131 [2020-09-24 19:25:48,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:25:48,896 INFO L479 AbstractCegarLoop]: Abstraction has 891 states and 1045 transitions. [2020-09-24 19:25:48,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:25:48,896 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1045 transitions. [2020-09-24 19:25:48,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-09-24 19:25:48,900 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:25:48,900 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 19:25:48,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 19:25:48,901 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:25:48,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:25:48,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1687843793, now seen corresponding path program 1 times [2020-09-24 19:25:48,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:25:48,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900191009] [2020-09-24 19:25:48,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:25:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:25:48,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:49,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:49,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:49,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:49,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:49,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:49,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:25:49,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-09-24 19:25:49,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 19:25:49,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1028 [2020-09-24 19:25:49,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:25:49,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:25:49,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-09-24 19:25:49,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-09-24 19:25:49,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:25:50,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:25:50,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:25:50,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:50,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:25:50,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 19:25:50,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:25:50,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-24 19:25:50,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:25:50,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:25:50,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:25:50,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:25:50,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 19:25:50,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 19:25:50,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:25:50,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:50,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:25:50,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 19:25:50,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:25:50,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-24 19:25:50,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:25:50,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:25:50,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:25:50,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 19:25:50,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:25:50,289 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:25:50,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900191009] [2020-09-24 19:25:50,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:25:50,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 19:25:50,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202165075] [2020-09-24 19:25:50,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:25:50,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:25:50,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:25:50,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:25:50,292 INFO L87 Difference]: Start difference. First operand 891 states and 1045 transitions. Second operand 5 states. [2020-09-24 19:25:52,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:25:52,230 INFO L93 Difference]: Finished difference Result 2276 states and 2773 transitions. [2020-09-24 19:25:52,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:25:52,230 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2020-09-24 19:25:52,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:25:52,240 INFO L225 Difference]: With dead ends: 2276 [2020-09-24 19:25:52,241 INFO L226 Difference]: Without dead ends: 1409 [2020-09-24 19:25:52,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:25:52,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2020-09-24 19:25:52,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 1177. [2020-09-24 19:25:52,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1177 states. [2020-09-24 19:25:52,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1428 transitions. [2020-09-24 19:25:52,308 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1428 transitions. Word has length 135 [2020-09-24 19:25:52,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:25:52,310 INFO L479 AbstractCegarLoop]: Abstraction has 1177 states and 1428 transitions. [2020-09-24 19:25:52,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:25:52,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1428 transitions. [2020-09-24 19:25:52,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-09-24 19:25:52,318 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:25:52,319 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 19:25:52,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 19:25:52,319 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:25:52,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:25:52,321 INFO L82 PathProgramCache]: Analyzing trace with hash 39430160, now seen corresponding path program 1 times [2020-09-24 19:25:52,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:25:52,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39147278] [2020-09-24 19:25:52,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:25:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:25:52,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:52,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:52,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:52,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:52,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:52,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:53,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:53,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:25:53,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-09-24 19:25:53,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 19:25:53,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1016 [2020-09-24 19:25:53,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:25:53,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:25:53,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-09-24 19:25:53,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-09-24 19:25:53,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:25:53,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:25:53,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:25:53,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:53,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:25:53,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 19:25:53,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:25:53,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 19:25:53,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:25:53,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:25:53,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:25:53,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:25:53,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:25:53,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 19:25:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:25:53,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:53,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:25:53,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 19:25:53,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:25:53,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-24 19:25:53,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:25:53,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:25:53,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:25:53,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 19:25:53,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:25:53,631 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:25:53,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39147278] [2020-09-24 19:25:53,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:25:53,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 19:25:53,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300582651] [2020-09-24 19:25:53,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:25:53,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:25:53,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:25:53,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:25:53,634 INFO L87 Difference]: Start difference. First operand 1177 states and 1428 transitions. Second operand 5 states. [2020-09-24 19:25:55,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:25:55,482 INFO L93 Difference]: Finished difference Result 2769 states and 3451 transitions. [2020-09-24 19:25:55,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:25:55,483 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 140 [2020-09-24 19:25:55,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:25:55,490 INFO L225 Difference]: With dead ends: 2769 [2020-09-24 19:25:55,490 INFO L226 Difference]: Without dead ends: 1141 [2020-09-24 19:25:55,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:25:55,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2020-09-24 19:25:55,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 1131. [2020-09-24 19:25:55,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1131 states. [2020-09-24 19:25:55,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1352 transitions. [2020-09-24 19:25:55,534 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1352 transitions. Word has length 140 [2020-09-24 19:25:55,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:25:55,534 INFO L479 AbstractCegarLoop]: Abstraction has 1131 states and 1352 transitions. [2020-09-24 19:25:55,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:25:55,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1352 transitions. [2020-09-24 19:25:55,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-09-24 19:25:55,540 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:25:55,541 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:25:55,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 19:25:55,541 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:25:55,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:25:55,542 INFO L82 PathProgramCache]: Analyzing trace with hash 926609686, now seen corresponding path program 1 times [2020-09-24 19:25:55,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:25:55,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847199883] [2020-09-24 19:25:55,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:25:55,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:25:55,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:55,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:55,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:56,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:56,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:56,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:25:56,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-09-24 19:25:56,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 19:25:56,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1001 [2020-09-24 19:25:56,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:25:56,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:25:56,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 19:25:56,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-09-24 19:25:56,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:25:56,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:25:56,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:25:56,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:56,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:25:56,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 19:25:56,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:25:56,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-24 19:25:56,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:25:56,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:25:56,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:25:56,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 19:25:56,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:25:56,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 19:25:56,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:25:56,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:57,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:25:57,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-24 19:25:57,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:25:57,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-09-24 19:25:57,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:25:57,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:25:57,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 19:25:57,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-09-24 19:25:57,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:25:57,120 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:25:57,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847199883] [2020-09-24 19:25:57,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:25:57,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 19:25:57,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822672747] [2020-09-24 19:25:57,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 19:25:57,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:25:57,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 19:25:57,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:25:57,123 INFO L87 Difference]: Start difference. First operand 1131 states and 1352 transitions. Second operand 7 states. [2020-09-24 19:25:59,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:25:59,478 INFO L93 Difference]: Finished difference Result 2900 states and 3535 transitions. [2020-09-24 19:25:59,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 19:25:59,479 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 176 [2020-09-24 19:25:59,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:25:59,488 INFO L225 Difference]: With dead ends: 2900 [2020-09-24 19:25:59,488 INFO L226 Difference]: Without dead ends: 1645 [2020-09-24 19:25:59,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-24 19:25:59,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2020-09-24 19:25:59,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1582. [2020-09-24 19:25:59,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1582 states. [2020-09-24 19:25:59,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 1899 transitions. [2020-09-24 19:25:59,544 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 1899 transitions. Word has length 176 [2020-09-24 19:25:59,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:25:59,545 INFO L479 AbstractCegarLoop]: Abstraction has 1582 states and 1899 transitions. [2020-09-24 19:25:59,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 19:25:59,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 1899 transitions. [2020-09-24 19:25:59,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-09-24 19:25:59,552 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:25:59,553 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:25:59,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 19:25:59,553 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:25:59,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:25:59,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1319899365, now seen corresponding path program 1 times [2020-09-24 19:25:59,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:25:59,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175319658] [2020-09-24 19:25:59,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:25:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:25:59,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:25:59,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:00,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:00,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:00,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:00,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:00,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:00,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-09-24 19:26:00,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 19:26:00,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-09-24 19:26:00,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:00,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:26:00,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-24 19:26:00,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-09-24 19:26:00,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:00,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:26:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:00,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:00,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:00,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 19:26:00,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:00,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 19:26:00,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:00,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:26:00,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:00,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:26:00,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:00,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 19:26:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:00,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:00,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:00,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 19:26:00,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:00,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-24 19:26:00,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:00,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:26:00,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:00,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 19:26:00,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:00,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 19:26:00,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:00,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:00,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:00,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-24 19:26:00,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:00,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-09-24 19:26:00,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:00,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:26:00,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 19:26:00,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-09-24 19:26:00,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:26:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 80 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 19:26:01,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175319658] [2020-09-24 19:26:01,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:26:01,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 19:26:01,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114475144] [2020-09-24 19:26:01,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 19:26:01,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:26:01,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 19:26:01,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:26:01,225 INFO L87 Difference]: Start difference. First operand 1582 states and 1899 transitions. Second operand 7 states. [2020-09-24 19:26:03,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:26:03,863 INFO L93 Difference]: Finished difference Result 3655 states and 4435 transitions. [2020-09-24 19:26:03,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 19:26:03,864 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 197 [2020-09-24 19:26:03,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:26:03,875 INFO L225 Difference]: With dead ends: 3655 [2020-09-24 19:26:03,875 INFO L226 Difference]: Without dead ends: 1883 [2020-09-24 19:26:03,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-24 19:26:03,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2020-09-24 19:26:03,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1835. [2020-09-24 19:26:03,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-09-24 19:26:03,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2142 transitions. [2020-09-24 19:26:03,940 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2142 transitions. Word has length 197 [2020-09-24 19:26:03,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:26:03,940 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2142 transitions. [2020-09-24 19:26:03,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 19:26:03,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2142 transitions. [2020-09-24 19:26:03,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-09-24 19:26:03,948 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:26:03,949 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:26:03,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 19:26:03,949 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:26:03,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:26:03,950 INFO L82 PathProgramCache]: Analyzing trace with hash -350239711, now seen corresponding path program 1 times [2020-09-24 19:26:03,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:26:03,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842466743] [2020-09-24 19:26:03,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:26:03,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:04,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:04,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:04,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:04,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:04,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:04,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-09-24 19:26:04,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:26:04,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1010 [2020-09-24 19:26:05,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:05,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:26:05,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-09-24 19:26:05,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-09-24 19:26:05,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:05,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:26:05,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:05,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:05,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:05,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 19:26:05,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:05,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 19:26:05,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:05,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:26:05,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:05,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:26:05,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:05,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 19:26:05,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:05,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:05,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:05,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:26:05,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:05,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-24 19:26:05,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:05,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:26:05,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:05,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 19:26:05,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:05,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-24 19:26:05,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:05,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:05,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:05,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-24 19:26:05,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:05,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-09-24 19:26:05,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:05,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:26:05,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 19:26:05,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-09-24 19:26:05,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:26:05,721 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 96 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 19:26:05,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842466743] [2020-09-24 19:26:05,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:26:05,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 19:26:05,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581984794] [2020-09-24 19:26:05,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 19:26:05,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:26:05,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 19:26:05,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-24 19:26:05,725 INFO L87 Difference]: Start difference. First operand 1835 states and 2142 transitions. Second operand 9 states. [2020-09-24 19:26:09,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:26:09,373 INFO L93 Difference]: Finished difference Result 5068 states and 6339 transitions. [2020-09-24 19:26:09,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 19:26:09,374 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 205 [2020-09-24 19:26:09,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:26:09,396 INFO L225 Difference]: With dead ends: 5068 [2020-09-24 19:26:09,396 INFO L226 Difference]: Without dead ends: 3257 [2020-09-24 19:26:09,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-09-24 19:26:09,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3257 states. [2020-09-24 19:26:09,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3257 to 2707. [2020-09-24 19:26:09,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2707 states. [2020-09-24 19:26:09,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2707 states to 2707 states and 3149 transitions. [2020-09-24 19:26:09,502 INFO L78 Accepts]: Start accepts. Automaton has 2707 states and 3149 transitions. Word has length 205 [2020-09-24 19:26:09,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:26:09,503 INFO L479 AbstractCegarLoop]: Abstraction has 2707 states and 3149 transitions. [2020-09-24 19:26:09,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 19:26:09,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2707 states and 3149 transitions. [2020-09-24 19:26:09,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-09-24 19:26:09,515 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:26:09,515 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, 2, 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] [2020-09-24 19:26:09,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 19:26:09,516 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:26:09,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:26:09,516 INFO L82 PathProgramCache]: Analyzing trace with hash -2063382552, now seen corresponding path program 1 times [2020-09-24 19:26:09,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:26:09,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942491856] [2020-09-24 19:26:09,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:26:09,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:09,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:09,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:10,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:10,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:10,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-09-24 19:26:10,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:26:10,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1027 [2020-09-24 19:26:10,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:10,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:26:10,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-09-24 19:26:10,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-09-24 19:26:10,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:10,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:26:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:10,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:10,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:10,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 19:26:10,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:10,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 19:26:10,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:10,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:26:10,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:10,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:26:10,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:10,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 19:26:10,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:10,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:10,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:10,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-24 19:26:10,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:10,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-09-24 19:26:10,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:10,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:26:10,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:10,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-24 19:26:10,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:10,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-24 19:26:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:10,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:10,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:10,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-24 19:26:10,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:10,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-09-24 19:26:10,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:10,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:26:10,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 19:26:10,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-09-24 19:26:10,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:11,127 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 124 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 19:26:11,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942491856] [2020-09-24 19:26:11,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:26:11,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 19:26:11,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998711466] [2020-09-24 19:26:11,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 19:26:11,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:26:11,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 19:26:11,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:26:11,132 INFO L87 Difference]: Start difference. First operand 2707 states and 3149 transitions. Second operand 8 states. [2020-09-24 19:26:12,852 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-09-24 19:26:14,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:26:14,159 INFO L93 Difference]: Finished difference Result 6153 states and 7240 transitions. [2020-09-24 19:26:14,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 19:26:14,160 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 219 [2020-09-24 19:26:14,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:26:14,176 INFO L225 Difference]: With dead ends: 6153 [2020-09-24 19:26:14,176 INFO L226 Difference]: Without dead ends: 3470 [2020-09-24 19:26:14,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2020-09-24 19:26:14,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3470 states. [2020-09-24 19:26:14,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3470 to 3443. [2020-09-24 19:26:14,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3443 states. [2020-09-24 19:26:14,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3443 states to 3443 states and 3878 transitions. [2020-09-24 19:26:14,274 INFO L78 Accepts]: Start accepts. Automaton has 3443 states and 3878 transitions. Word has length 219 [2020-09-24 19:26:14,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:26:14,275 INFO L479 AbstractCegarLoop]: Abstraction has 3443 states and 3878 transitions. [2020-09-24 19:26:14,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 19:26:14,275 INFO L276 IsEmpty]: Start isEmpty. Operand 3443 states and 3878 transitions. [2020-09-24 19:26:14,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-09-24 19:26:14,288 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:26:14,288 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-24 19:26:14,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 19:26:14,289 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:26:14,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:26:14,289 INFO L82 PathProgramCache]: Analyzing trace with hash 541088312, now seen corresponding path program 1 times [2020-09-24 19:26:14,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:26:14,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719864997] [2020-09-24 19:26:14,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:26:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:14,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:14,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:14,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:14,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:15,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:15,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:15,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:15,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:15,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 252 [2020-09-24 19:26:15,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 19:26:15,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1011 [2020-09-24 19:26:15,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:15,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:26:15,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-09-24 19:26:15,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-09-24 19:26:15,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:15,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:26:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:15,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:15,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:15,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 19:26:15,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:15,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 19:26:15,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:15,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:26:15,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:15,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:26:15,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:15,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 19:26:15,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:15,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:15,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:15,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:26:15,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:15,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 19:26:15,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:15,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:26:15,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:15,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:26:15,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:15,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-24 19:26:15,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:15,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:15,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:15,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-24 19:26:15,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:15,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-09-24 19:26:15,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:15,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:26:15,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:15,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 19:26:15,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:15,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-24 19:26:15,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:15,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:15,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:15,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-24 19:26:15,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:15,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-09-24 19:26:15,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:15,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:26:15,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 19:26:15,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-09-24 19:26:15,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:15,916 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-24 19:26:15,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719864997] [2020-09-24 19:26:15,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:26:15,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 19:26:15,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787329510] [2020-09-24 19:26:15,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 19:26:15,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:26:15,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 19:26:15,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:26:15,919 INFO L87 Difference]: Start difference. First operand 3443 states and 3878 transitions. Second operand 8 states. [2020-09-24 19:26:18,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:26:18,227 INFO L93 Difference]: Finished difference Result 7045 states and 7968 transitions. [2020-09-24 19:26:18,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 19:26:18,227 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 237 [2020-09-24 19:26:18,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:26:18,241 INFO L225 Difference]: With dead ends: 7045 [2020-09-24 19:26:18,242 INFO L226 Difference]: Without dead ends: 3626 [2020-09-24 19:26:18,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-24 19:26:18,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3626 states. [2020-09-24 19:26:18,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3626 to 3584. [2020-09-24 19:26:18,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3584 states. [2020-09-24 19:26:18,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 4027 transitions. [2020-09-24 19:26:18,335 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 4027 transitions. Word has length 237 [2020-09-24 19:26:18,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:26:18,336 INFO L479 AbstractCegarLoop]: Abstraction has 3584 states and 4027 transitions. [2020-09-24 19:26:18,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 19:26:18,336 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 4027 transitions. [2020-09-24 19:26:18,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-09-24 19:26:18,349 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:26:18,349 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, 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] [2020-09-24 19:26:18,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 19:26:18,349 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:26:18,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:26:18,350 INFO L82 PathProgramCache]: Analyzing trace with hash -685843220, now seen corresponding path program 1 times [2020-09-24 19:26:18,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:26:18,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440935441] [2020-09-24 19:26:18,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:26:18,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:18,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:18,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:18,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:19,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:19,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-09-24 19:26:19,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:26:19,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1043 [2020-09-24 19:26:19,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:19,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:26:19,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-09-24 19:26:19,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-09-24 19:26:19,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:19,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:26:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:19,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:19,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:19,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 19:26:19,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:19,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 19:26:19,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:19,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:26:19,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:19,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:26:19,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:19,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 19:26:19,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:19,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:19,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:19,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-24 19:26:19,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:19,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-09-24 19:26:19,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:19,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:26:19,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:19,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-24 19:26:19,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:19,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-24 19:26:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:19,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:19,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:19,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-24 19:26:19,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:19,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-09-24 19:26:19,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:19,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:26:19,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 19:26:19,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-09-24 19:26:19,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:20,352 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 19:26:20,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440935441] [2020-09-24 19:26:20,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:26:20,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 19:26:20,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446591781] [2020-09-24 19:26:20,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 19:26:20,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:26:20,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 19:26:20,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:26:20,356 INFO L87 Difference]: Start difference. First operand 3584 states and 4027 transitions. Second operand 8 states. [2020-09-24 19:26:21,166 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-09-24 19:26:23,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:26:23,411 INFO L93 Difference]: Finished difference Result 7328 states and 8251 transitions. [2020-09-24 19:26:23,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 19:26:23,412 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 243 [2020-09-24 19:26:23,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:26:23,425 INFO L225 Difference]: With dead ends: 7328 [2020-09-24 19:26:23,426 INFO L226 Difference]: Without dead ends: 3426 [2020-09-24 19:26:23,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-09-24 19:26:23,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3426 states. [2020-09-24 19:26:23,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3426 to 3387. [2020-09-24 19:26:23,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3387 states. [2020-09-24 19:26:23,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3387 states to 3387 states and 3711 transitions. [2020-09-24 19:26:23,510 INFO L78 Accepts]: Start accepts. Automaton has 3387 states and 3711 transitions. Word has length 243 [2020-09-24 19:26:23,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:26:23,510 INFO L479 AbstractCegarLoop]: Abstraction has 3387 states and 3711 transitions. [2020-09-24 19:26:23,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 19:26:23,510 INFO L276 IsEmpty]: Start isEmpty. Operand 3387 states and 3711 transitions. [2020-09-24 19:26:23,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-09-24 19:26:23,521 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:26:23,521 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:26:23,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 19:26:23,522 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:26:23,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:26:23,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1910271732, now seen corresponding path program 1 times [2020-09-24 19:26:23,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:26:23,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010496362] [2020-09-24 19:26:23,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:26:23,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:23,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:23,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:24,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:24,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:24,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:24,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 267 [2020-09-24 19:26:24,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:26:24,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1127 [2020-09-24 19:26:24,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:24,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:26:24,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 170 [2020-09-24 19:26:24,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-09-24 19:26:24,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:24,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:26:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:24,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:24,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:24,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 19:26:24,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:24,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 19:26:24,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:24,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:26:24,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:24,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:26:24,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:24,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 19:26:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:24,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:24,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:24,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 19:26:24,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:24,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 19:26:24,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:24,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:26:24,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:24,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:26:24,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:24,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-24 19:26:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:24,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:24,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:24,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-24 19:26:24,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:24,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-24 19:26:24,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:24,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:26:24,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:24,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:26:24,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:24,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-09-24 19:26:24,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:24,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:25,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:25,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-24 19:26:25,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:25,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-24 19:26:25,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:25,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:26:25,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:25,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-09-24 19:26:25,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 126 proven. 3 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-09-24 19:26:25,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010496362] [2020-09-24 19:26:25,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:26:25,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 19:26:25,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509395205] [2020-09-24 19:26:25,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:26:25,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:26:25,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:26:25,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:26:25,116 INFO L87 Difference]: Start difference. First operand 3387 states and 3711 transitions. Second operand 5 states. [2020-09-24 19:26:26,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:26:26,722 INFO L93 Difference]: Finished difference Result 6933 states and 7619 transitions. [2020-09-24 19:26:26,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:26:26,723 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 252 [2020-09-24 19:26:26,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:26:26,736 INFO L225 Difference]: With dead ends: 6933 [2020-09-24 19:26:26,736 INFO L226 Difference]: Without dead ends: 3570 [2020-09-24 19:26:26,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:26:26,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3570 states. [2020-09-24 19:26:26,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3570 to 3389. [2020-09-24 19:26:26,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3389 states. [2020-09-24 19:26:26,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3389 states to 3389 states and 3678 transitions. [2020-09-24 19:26:26,818 INFO L78 Accepts]: Start accepts. Automaton has 3389 states and 3678 transitions. Word has length 252 [2020-09-24 19:26:26,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:26:26,819 INFO L479 AbstractCegarLoop]: Abstraction has 3389 states and 3678 transitions. [2020-09-24 19:26:26,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:26:26,819 INFO L276 IsEmpty]: Start isEmpty. Operand 3389 states and 3678 transitions. [2020-09-24 19:26:26,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-09-24 19:26:26,834 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:26:26,835 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:26:26,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 19:26:26,835 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:26:26,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:26:26,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1539255752, now seen corresponding path program 1 times [2020-09-24 19:26:26,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:26:26,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751367789] [2020-09-24 19:26:26,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:26:26,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:26,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:27,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:27,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:27,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:27,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-09-24 19:26:27,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:26:27,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1037 [2020-09-24 19:26:27,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:27,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:26:27,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-09-24 19:26:27,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-09-24 19:26:27,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:28,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:26:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:28,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:28,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:28,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 19:26:28,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:28,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 19:26:28,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:28,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:26:28,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:28,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:26:28,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:28,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 19:26:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:28,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:28,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:28,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-24 19:26:28,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:28,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 19:26:28,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:28,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:26:28,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:28,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:26:28,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:28,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-24 19:26:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:28,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:28,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:28,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 19:26:28,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:28,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-24 19:26:28,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:28,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:26:28,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:28,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 19:26:28,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:28,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-09-24 19:26:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:28,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:28,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:28,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-24 19:26:28,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:28,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-09-24 19:26:28,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:28,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:26:28,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 19:26:28,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-09-24 19:26:28,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:28,400 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 191 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-09-24 19:26:28,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751367789] [2020-09-24 19:26:28,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:26:28,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 19:26:28,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498222090] [2020-09-24 19:26:28,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 19:26:28,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:26:28,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 19:26:28,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:26:28,403 INFO L87 Difference]: Start difference. First operand 3389 states and 3678 transitions. Second operand 8 states.