/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init5_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:38:16,697 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:38:16,701 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:38:16,747 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:38:16,748 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:38:16,749 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:38:16,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:38:16,752 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:38:16,754 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:38:16,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:38:16,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:38:16,756 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:38:16,757 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:38:16,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:38:16,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:38:16,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:38:16,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:38:16,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:38:16,763 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:38:16,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:38:16,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:38:16,768 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:38:16,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:38:16,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:38:16,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:38:16,773 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:38:16,773 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:38:16,774 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:38:16,774 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:38:16,775 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:38:16,776 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:38:16,776 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:38:16,777 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:38:16,778 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:38:16,779 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:38:16,779 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:38:16,780 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:38:16,780 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:38:16,780 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:38:16,781 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:38:16,782 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:38:16,782 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 23:38:16,805 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:38:16,805 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:38:16,807 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:38:16,807 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:38:16,807 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:38:16,808 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:38:16,808 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:38:16,808 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:38:16,808 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:38:16,809 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:38:16,809 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:38:16,809 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:38:16,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:38:16,809 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:38:16,810 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:38:16,810 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:38:16,810 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:38:16,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:38:16,810 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:38:16,811 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:38:16,811 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:38:16,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:38:16,811 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:38:16,811 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:38:16,812 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:38:16,812 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:38:16,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:38:16,812 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:38:16,813 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:38:16,813 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:38:17,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:38:17,147 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:38:17,151 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:38:17,152 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:38:17,153 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:38:17,153 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init5_ground-1.i [2020-10-13 23:38:17,228 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fccea08d4/e1017906cb8f4d13afa0d5a1d46dde38/FLAG6b345f416 [2020-10-13 23:38:17,721 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:38:17,722 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init5_ground-1.i [2020-10-13 23:38:17,728 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fccea08d4/e1017906cb8f4d13afa0d5a1d46dde38/FLAG6b345f416 [2020-10-13 23:38:18,143 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fccea08d4/e1017906cb8f4d13afa0d5a1d46dde38 [2020-10-13 23:38:18,153 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:38:18,155 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:38:18,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:38:18,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:38:18,160 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:38:18,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:38:18" (1/1) ... [2020-10-13 23:38:18,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bb58955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:18, skipping insertion in model container [2020-10-13 23:38:18,165 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:38:18" (1/1) ... [2020-10-13 23:38:18,173 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:38:18,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:38:18,387 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:38:18,391 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:38:18,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:38:18,442 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:38:18,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:18 WrapperNode [2020-10-13 23:38:18,442 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:38:18,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:38:18,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:38:18,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:38:18,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:18" (1/1) ... [2020-10-13 23:38:18,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:18" (1/1) ... [2020-10-13 23:38:18,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:18" (1/1) ... [2020-10-13 23:38:18,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:18" (1/1) ... [2020-10-13 23:38:18,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:18" (1/1) ... [2020-10-13 23:38:18,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:18" (1/1) ... [2020-10-13 23:38:18,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:18" (1/1) ... [2020-10-13 23:38:18,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:38:18,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:38:18,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:38:18,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:38:18,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:38:18,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:38:18,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:38:18,635 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:38:18,635 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:38:18,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:38:18,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:38:18,636 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:38:18,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:38:18,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:38:18,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:38:18,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:38:18,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:38:18,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:38:18,894 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:38:18,894 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-13 23:38:18,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:38:18 BoogieIcfgContainer [2020-10-13 23:38:18,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:38:18,900 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:38:18,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:38:18,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:38:18,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:38:18" (1/3) ... [2020-10-13 23:38:18,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d53302a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:38:18, skipping insertion in model container [2020-10-13 23:38:18,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:18" (2/3) ... [2020-10-13 23:38:18,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d53302a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:38:18, skipping insertion in model container [2020-10-13 23:38:18,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:38:18" (3/3) ... [2020-10-13 23:38:18,907 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init5_ground-1.i [2020-10-13 23:38:18,925 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:38:18,943 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:38:18,978 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:38:19,005 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:38:19,005 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:38:19,005 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:38:19,005 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:38:19,006 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:38:19,006 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:38:19,006 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:38:19,006 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:38:19,024 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-13 23:38:19,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 23:38:19,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:19,032 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] [2020-10-13 23:38:19,033 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:19,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:19,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1721973062, now seen corresponding path program 1 times [2020-10-13 23:38:19,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:19,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339209229] [2020-10-13 23:38:19,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:19,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:19,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:19,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:19,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:19,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:19,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:19,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 23:38:19,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:38:19,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 773 [2020-10-13 23:38:19,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:19,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:19,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:19,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:38:19,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:19,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 23:38:20,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:20,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:20,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:20,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:20,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:20,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:20,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:38:20,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:20,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:20,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:20,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:20,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:20,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:38:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:38:20,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339209229] [2020-10-13 23:38:20,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:38:20,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:38:20,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190907058] [2020-10-13 23:38:20,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:38:20,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:20,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:38:20,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:38:20,087 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2020-10-13 23:38:20,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:20,233 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2020-10-13 23:38:20,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:38:20,235 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-13 23:38:20,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:20,251 INFO L225 Difference]: With dead ends: 55 [2020-10-13 23:38:20,251 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 23:38:20,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:38:20,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 23:38:20,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-13 23:38:20,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 23:38:20,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-10-13 23:38:20,293 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 21 [2020-10-13 23:38:20,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:20,294 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-10-13 23:38:20,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:38:20,294 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-10-13 23:38:20,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 23:38:20,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:20,296 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] [2020-10-13 23:38:20,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:38:20,296 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:20,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:20,297 INFO L82 PathProgramCache]: Analyzing trace with hash -13266878, now seen corresponding path program 1 times [2020-10-13 23:38:20,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:20,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177679250] [2020-10-13 23:38:20,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:20,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:20,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:20,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:20,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:20,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:20,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:20,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 23:38:20,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:38:20,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 526 [2020-10-13 23:38:20,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:20,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:20,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:38:20,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 23:38:20,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:38:20,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 23:38:20,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:20,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:20,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:20,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:20,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:20,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:20,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:38:20,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:20,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:20,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:20,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:20,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:20,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:20,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:38:20,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177679250] [2020-10-13 23:38:20,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:38:20,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:38:20,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207198452] [2020-10-13 23:38:20,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:38:20,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:20,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:38:20,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:38:20,898 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2020-10-13 23:38:21,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:21,039 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2020-10-13 23:38:21,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:38:21,040 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-13 23:38:21,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:21,041 INFO L225 Difference]: With dead ends: 50 [2020-10-13 23:38:21,042 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 23:38:21,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:38:21,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 23:38:21,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-13 23:38:21,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 23:38:21,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-13 23:38:21,062 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2020-10-13 23:38:21,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:21,062 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-13 23:38:21,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:38:21,063 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-13 23:38:21,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 23:38:21,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:21,067 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] [2020-10-13 23:38:21,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:38:21,067 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:21,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:21,069 INFO L82 PathProgramCache]: Analyzing trace with hash -927642988, now seen corresponding path program 1 times [2020-10-13 23:38:21,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:21,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623278233] [2020-10-13 23:38:21,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:21,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:21,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:21,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:21,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:21,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:23,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:26,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:26,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 23:38:26,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:38:26,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:38:26,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:26,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:26,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:38:26,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 23:38:26,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 23:38:26,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:26,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:26,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:26,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:26,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:26,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:26,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:26,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:38:26,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:26,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:26,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:26,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:26,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:26,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:38:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:38:26,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623278233] [2020-10-13 23:38:26,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:26,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:38:26,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548846175] [2020-10-13 23:38:26,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:38:26,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:26,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:38:26,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:38:26,133 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 5 states. [2020-10-13 23:38:26,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:26,299 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2020-10-13 23:38:26,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:38:26,299 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-13 23:38:26,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:26,300 INFO L225 Difference]: With dead ends: 59 [2020-10-13 23:38:26,300 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 23:38:26,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:38:26,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 23:38:26,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-13 23:38:26,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 23:38:26,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-10-13 23:38:26,312 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 26 [2020-10-13 23:38:26,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:26,312 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-10-13 23:38:26,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:38:26,312 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-10-13 23:38:26,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 23:38:26,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:26,314 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 23:38:26,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:38:26,314 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:26,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:26,315 INFO L82 PathProgramCache]: Analyzing trace with hash -681366654, now seen corresponding path program 2 times [2020-10-13 23:38:26,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:26,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67629785] [2020-10-13 23:38:26,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:26,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:26,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:26,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:26,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:26,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:31,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:31,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 23:38:31,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:38:31,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:38:31,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:31,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:31,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:38:31,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 23:38:31,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:38:31,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:31,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:31,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:31,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:31,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:31,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:31,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:31,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:38:31,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:31,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:31,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:31,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:31,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:31,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:38:31,392 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 23:38:31,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67629785] [2020-10-13 23:38:31,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:31,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:38:31,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855509875] [2020-10-13 23:38:31,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:38:31,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:31,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:38:31,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:38:31,397 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 6 states. [2020-10-13 23:38:31,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:31,556 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2020-10-13 23:38:31,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:38:31,557 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-13 23:38:31,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:31,558 INFO L225 Difference]: With dead ends: 68 [2020-10-13 23:38:31,558 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 23:38:31,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:38:31,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 23:38:31,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-13 23:38:31,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 23:38:31,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-10-13 23:38:31,567 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 31 [2020-10-13 23:38:31,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:31,567 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-10-13 23:38:31,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:38:31,567 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-10-13 23:38:31,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 23:38:31,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:31,569 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:31,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:38:31,569 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:31,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:31,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1000479276, now seen corresponding path program 3 times [2020-10-13 23:38:31,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:31,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022106385] [2020-10-13 23:38:31,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:31,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:31,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:31,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:31,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:31,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:36,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:36,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 23:38:36,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:38:36,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:38:36,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:36,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:36,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:38:36,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:38:36,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 23:38:36,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:36,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:36,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:36,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:36,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:36,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:36,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:38:36,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:36,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:36,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:36,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:36,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:36,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:36,646 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-13 23:38:36,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022106385] [2020-10-13 23:38:36,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:36,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:38:36,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343916770] [2020-10-13 23:38:36,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:38:36,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:36,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:38:36,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:38:36,651 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 7 states. [2020-10-13 23:38:36,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:36,806 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2020-10-13 23:38:36,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:38:36,807 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-10-13 23:38:36,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:36,808 INFO L225 Difference]: With dead ends: 77 [2020-10-13 23:38:36,808 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 23:38:36,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:38:36,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 23:38:36,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-13 23:38:36,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 23:38:36,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-10-13 23:38:36,826 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 36 [2020-10-13 23:38:36,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:36,827 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-10-13 23:38:36,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:38:36,828 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-10-13 23:38:36,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 23:38:36,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:36,829 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:36,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:38:36,830 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:36,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:36,830 INFO L82 PathProgramCache]: Analyzing trace with hash 631314114, now seen corresponding path program 4 times [2020-10-13 23:38:36,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:36,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314216838] [2020-10-13 23:38:36,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:36,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:36,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:36,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:36,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:36,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:37,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:41,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:41,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 23:38:41,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:38:41,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:38:41,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:41,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:41,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:38:41,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 23:38:41,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:38:41,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:41,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:41,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:41,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:41,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:41,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:41,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:41,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:38:41,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:41,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:41,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:41,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:41,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:41,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-13 23:38:41,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314216838] [2020-10-13 23:38:41,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:41,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:38:41,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665550503] [2020-10-13 23:38:41,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:38:41,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:41,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:38:41,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:38:41,927 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 8 states. [2020-10-13 23:38:42,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:42,082 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2020-10-13 23:38:42,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:38:42,083 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-13 23:38:42,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:42,084 INFO L225 Difference]: With dead ends: 86 [2020-10-13 23:38:42,084 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 23:38:42,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:38:42,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 23:38:42,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-13 23:38:42,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 23:38:42,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2020-10-13 23:38:42,092 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 41 [2020-10-13 23:38:42,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:42,093 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2020-10-13 23:38:42,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:38:42,093 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2020-10-13 23:38:42,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 23:38:42,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:42,094 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:42,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:38:42,095 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:42,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:42,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1809092332, now seen corresponding path program 5 times [2020-10-13 23:38:42,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:42,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815132423] [2020-10-13 23:38:42,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:42,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:42,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:42,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:42,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:42,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:44,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:47,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:47,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 23:38:47,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:38:47,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:38:47,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:47,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:47,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:38:47,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 23:38:47,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:38:47,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:47,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:47,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:47,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:47,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:47,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:47,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:47,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:47,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:47,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:47,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:47,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:47,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:47,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:47,186 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-13 23:38:47,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815132423] [2020-10-13 23:38:47,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:47,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:38:47,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748716543] [2020-10-13 23:38:47,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:38:47,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:47,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:38:47,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:38:47,188 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 9 states. [2020-10-13 23:38:47,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:47,340 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2020-10-13 23:38:47,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:38:47,340 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-10-13 23:38:47,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:47,341 INFO L225 Difference]: With dead ends: 95 [2020-10-13 23:38:47,341 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 23:38:47,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:38:47,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 23:38:47,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-13 23:38:47,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 23:38:47,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2020-10-13 23:38:47,350 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 46 [2020-10-13 23:38:47,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:47,350 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2020-10-13 23:38:47,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:38:47,350 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2020-10-13 23:38:47,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 23:38:47,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:47,352 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:47,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:38:47,352 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:47,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:47,352 INFO L82 PathProgramCache]: Analyzing trace with hash 2091864578, now seen corresponding path program 6 times [2020-10-13 23:38:47,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:47,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72859931] [2020-10-13 23:38:47,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:47,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:47,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:47,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:47,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:47,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:51,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:52,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:52,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 23:38:52,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:38:52,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:38:52,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:52,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:52,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:38:52,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:38:52,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:38:52,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:52,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:52,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:52,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:52,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:52,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:52,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:52,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:52,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:52,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:52,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:52,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:52,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:52,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:52,463 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-13 23:38:52,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72859931] [2020-10-13 23:38:52,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:52,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:38:52,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033970702] [2020-10-13 23:38:52,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:38:52,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:52,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:38:52,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:38:52,465 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 10 states. [2020-10-13 23:38:52,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:52,615 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2020-10-13 23:38:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:38:52,616 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-10-13 23:38:52,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:52,617 INFO L225 Difference]: With dead ends: 104 [2020-10-13 23:38:52,617 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 23:38:52,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:38:52,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 23:38:52,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-13 23:38:52,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 23:38:52,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2020-10-13 23:38:52,625 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 51 [2020-10-13 23:38:52,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:52,625 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2020-10-13 23:38:52,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:38:52,626 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2020-10-13 23:38:52,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 23:38:52,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:52,627 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:52,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:38:52,627 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:52,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:52,628 INFO L82 PathProgramCache]: Analyzing trace with hash -591532972, now seen corresponding path program 7 times [2020-10-13 23:38:52,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:52,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620773404] [2020-10-13 23:38:52,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:52,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:52,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:52,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:52,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:52,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:57,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:57,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:57,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 23:38:57,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:38:57,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:38:57,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:57,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:57,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:38:57,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 23:38:57,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 23:38:57,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:57,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:57,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:57,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:57,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:57,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:57,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:57,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:57,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:57,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:57,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:57,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:57,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:57,742 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-13 23:38:57,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620773404] [2020-10-13 23:38:57,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:57,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:38:57,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447183645] [2020-10-13 23:38:57,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:38:57,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:57,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:38:57,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:38:57,745 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 11 states. [2020-10-13 23:38:57,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:57,919 INFO L93 Difference]: Finished difference Result 113 states and 127 transitions. [2020-10-13 23:38:57,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:38:57,920 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-13 23:38:57,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:57,921 INFO L225 Difference]: With dead ends: 113 [2020-10-13 23:38:57,921 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 23:38:57,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:38:57,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 23:38:57,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-13 23:38:57,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 23:38:57,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-10-13 23:38:57,930 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 56 [2020-10-13 23:38:57,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:57,932 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-10-13 23:38:57,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:38:57,932 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-10-13 23:38:57,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 23:38:57,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:57,934 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:57,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:38:57,934 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:57,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:57,934 INFO L82 PathProgramCache]: Analyzing trace with hash 642637122, now seen corresponding path program 8 times [2020-10-13 23:38:57,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:57,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461206258] [2020-10-13 23:38:57,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:57,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:57,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:57,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:58,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:58,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:02,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:02,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 23:39:02,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:39:02,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:39:02,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:02,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:02,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:39:02,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 23:39:02,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:39:02,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:03,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:03,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:03,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:03,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:03,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:03,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:03,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:03,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:03,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:03,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:03,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:03,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-13 23:39:03,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461206258] [2020-10-13 23:39:03,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:03,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:39:03,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854064655] [2020-10-13 23:39:03,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:39:03,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:03,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:39:03,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:39:03,070 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 12 states. [2020-10-13 23:39:03,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:03,270 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2020-10-13 23:39:03,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:39:03,270 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-10-13 23:39:03,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:03,272 INFO L225 Difference]: With dead ends: 122 [2020-10-13 23:39:03,272 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 23:39:03,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:39:03,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 23:39:03,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-13 23:39:03,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 23:39:03,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2020-10-13 23:39:03,280 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 61 [2020-10-13 23:39:03,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:03,281 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2020-10-13 23:39:03,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:39:03,281 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2020-10-13 23:39:03,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 23:39:03,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:03,282 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:03,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:39:03,283 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:03,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:03,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1682614380, now seen corresponding path program 9 times [2020-10-13 23:39:03,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:03,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458440727] [2020-10-13 23:39:03,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:03,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:03,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:03,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:03,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:08,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:08,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 23:39:08,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:39:08,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:39:08,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:08,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:08,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:39:08,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:39:08,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 23:39:08,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:08,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:08,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:08,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:08,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:08,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:08,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:08,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:08,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:08,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:08,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:08,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:08,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:08,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:08,422 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-13 23:39:08,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458440727] [2020-10-13 23:39:08,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:08,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:39:08,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586358106] [2020-10-13 23:39:08,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:39:08,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:08,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:39:08,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:39:08,425 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand 13 states. [2020-10-13 23:39:08,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:08,598 INFO L93 Difference]: Finished difference Result 131 states and 145 transitions. [2020-10-13 23:39:08,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:39:08,599 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-10-13 23:39:08,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:08,600 INFO L225 Difference]: With dead ends: 131 [2020-10-13 23:39:08,600 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 23:39:08,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:39:08,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 23:39:08,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-13 23:39:08,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 23:39:08,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2020-10-13 23:39:08,611 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 66 [2020-10-13 23:39:08,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:08,612 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2020-10-13 23:39:08,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:39:08,612 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2020-10-13 23:39:08,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 23:39:08,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:08,613 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:08,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:39:08,613 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:08,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:08,614 INFO L82 PathProgramCache]: Analyzing trace with hash 591181954, now seen corresponding path program 10 times [2020-10-13 23:39:08,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:08,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150471161] [2020-10-13 23:39:08,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:08,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:08,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:08,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:08,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:08,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:13,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:13,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 23:39:13,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:39:13,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:39:13,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:13,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:13,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:39:13,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 23:39:13,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:39:13,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:13,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:13,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:13,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:13,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:13,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:13,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:13,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:13,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:13,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:13,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:13,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:13,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:13,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-10-13 23:39:13,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150471161] [2020-10-13 23:39:13,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:13,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:39:13,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214487264] [2020-10-13 23:39:13,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:39:13,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:13,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:39:13,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:39:13,763 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand 14 states. [2020-10-13 23:39:13,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:13,962 INFO L93 Difference]: Finished difference Result 140 states and 154 transitions. [2020-10-13 23:39:13,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:39:13,962 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 71 [2020-10-13 23:39:13,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:13,963 INFO L225 Difference]: With dead ends: 140 [2020-10-13 23:39:13,963 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 23:39:13,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:39:13,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 23:39:13,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-13 23:39:13,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 23:39:13,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2020-10-13 23:39:13,973 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 71 [2020-10-13 23:39:13,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:13,974 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2020-10-13 23:39:13,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:39:13,974 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2020-10-13 23:39:13,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 23:39:13,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:13,975 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:13,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:39:13,976 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:13,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:13,976 INFO L82 PathProgramCache]: Analyzing trace with hash 665957076, now seen corresponding path program 11 times [2020-10-13 23:39:13,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:13,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562547822] [2020-10-13 23:39:13,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:13,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:13,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:14,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:14,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:14,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:18,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:18,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 23:39:18,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:39:18,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:39:18,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:18,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:18,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:39:18,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 23:39:18,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 23:39:18,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:19,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:19,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:19,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:19,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:19,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:19,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:19,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:19,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:19,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:19,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:19,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:19,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:19,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:19,149 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-10-13 23:39:19,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562547822] [2020-10-13 23:39:19,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:19,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:39:19,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190622664] [2020-10-13 23:39:19,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:39:19,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:19,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:39:19,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:39:19,152 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand 15 states. [2020-10-13 23:39:19,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:19,456 INFO L93 Difference]: Finished difference Result 149 states and 163 transitions. [2020-10-13 23:39:19,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:39:19,457 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 76 [2020-10-13 23:39:19,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:19,459 INFO L225 Difference]: With dead ends: 149 [2020-10-13 23:39:19,459 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 23:39:19,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:39:19,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 23:39:19,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-13 23:39:19,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 23:39:19,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2020-10-13 23:39:19,482 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 76 [2020-10-13 23:39:19,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:19,486 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2020-10-13 23:39:19,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:39:19,486 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2020-10-13 23:39:19,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 23:39:19,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:19,491 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:19,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:39:19,492 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:19,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:19,493 INFO L82 PathProgramCache]: Analyzing trace with hash 725345218, now seen corresponding path program 12 times [2020-10-13 23:39:19,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:19,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809172569] [2020-10-13 23:39:19,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:19,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:19,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:19,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:19,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:19,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:24,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:24,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 23:39:24,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:39:24,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:39:24,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:24,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:24,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:39:24,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:39:24,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:39:24,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:24,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:24,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:24,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:24,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:24,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:24,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:24,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:24,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:24,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:24,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:24,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:24,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:24,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:24,692 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-10-13 23:39:24,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809172569] [2020-10-13 23:39:24,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:24,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:39:24,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086095210] [2020-10-13 23:39:24,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:39:24,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:24,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:39:24,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:39:24,697 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 16 states. [2020-10-13 23:39:24,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:24,995 INFO L93 Difference]: Finished difference Result 158 states and 172 transitions. [2020-10-13 23:39:24,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:39:24,996 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 81 [2020-10-13 23:39:24,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:24,997 INFO L225 Difference]: With dead ends: 158 [2020-10-13 23:39:24,997 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 23:39:24,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:39:24,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 23:39:25,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-13 23:39:25,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 23:39:25,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2020-10-13 23:39:25,021 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 81 [2020-10-13 23:39:25,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:25,021 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2020-10-13 23:39:25,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:39:25,022 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2020-10-13 23:39:25,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 23:39:25,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:25,025 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:25,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:39:25,029 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:25,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:25,029 INFO L82 PathProgramCache]: Analyzing trace with hash 810745364, now seen corresponding path program 13 times [2020-10-13 23:39:25,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:25,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242133042] [2020-10-13 23:39:25,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:25,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:25,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:25,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:25,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:30,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:30,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 23:39:30,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:39:30,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:39:30,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:30,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:30,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:39:30,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 23:39:30,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 23:39:30,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:30,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:30,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:30,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:30,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:30,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:30,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:30,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:30,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:30,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:30,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:30,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:30,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-10-13 23:39:30,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242133042] [2020-10-13 23:39:30,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:30,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:39:30,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927098845] [2020-10-13 23:39:30,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:39:30,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:30,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:39:30,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:39:30,219 INFO L87 Difference]: Start difference. First operand 91 states and 96 transitions. Second operand 17 states. [2020-10-13 23:39:30,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:30,463 INFO L93 Difference]: Finished difference Result 167 states and 181 transitions. [2020-10-13 23:39:30,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:39:30,464 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 86 [2020-10-13 23:39:30,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:30,465 INFO L225 Difference]: With dead ends: 167 [2020-10-13 23:39:30,465 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 23:39:30,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:39:30,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 23:39:30,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-13 23:39:30,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 23:39:30,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2020-10-13 23:39:30,473 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 86 [2020-10-13 23:39:30,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:30,473 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2020-10-13 23:39:30,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:39:30,474 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2020-10-13 23:39:30,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 23:39:30,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:30,474 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:30,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:39:30,475 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:30,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:30,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1391763710, now seen corresponding path program 14 times [2020-10-13 23:39:30,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:30,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494967285] [2020-10-13 23:39:30,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:30,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:30,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:30,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:30,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:30,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:35,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:35,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 23:39:35,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:39:35,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:39:35,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:35,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:35,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:39:35,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-13 23:39:35,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:39:35,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:35,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:35,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:35,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:35,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:35,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:35,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:35,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:39:35,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:35,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:35,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:35,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:35,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:35,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:35,694 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-10-13 23:39:35,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494967285] [2020-10-13 23:39:35,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:35,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:39:35,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488430748] [2020-10-13 23:39:35,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:39:35,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:35,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:39:35,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:39:35,696 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand 18 states. [2020-10-13 23:39:35,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:35,942 INFO L93 Difference]: Finished difference Result 176 states and 190 transitions. [2020-10-13 23:39:35,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:39:35,942 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-10-13 23:39:35,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:35,943 INFO L225 Difference]: With dead ends: 176 [2020-10-13 23:39:35,943 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 23:39:35,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:39:35,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 23:39:35,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-13 23:39:35,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 23:39:35,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2020-10-13 23:39:35,950 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 91 [2020-10-13 23:39:35,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:35,951 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2020-10-13 23:39:35,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:39:35,951 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2020-10-13 23:39:35,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 23:39:35,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:35,952 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:35,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:39:35,952 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:35,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:35,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1103546028, now seen corresponding path program 15 times [2020-10-13 23:39:35,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:35,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523704651] [2020-10-13 23:39:35,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:35,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:36,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:36,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:36,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:40,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:40,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 23:39:40,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:39:40,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 23:39:40,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:40,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:40,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:39:40,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 23:39:40,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:39:40,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:41,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:41,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:41,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:41,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:41,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:41,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:39:41,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:41,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:41,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:41,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:41,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:41,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:41,173 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2020-10-13 23:39:41,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523704651] [2020-10-13 23:39:41,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:41,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:39:41,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735388425] [2020-10-13 23:39:41,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:39:41,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:41,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:39:41,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:39:41,176 INFO L87 Difference]: Start difference. First operand 101 states and 106 transitions. Second operand 19 states. [2020-10-13 23:39:41,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:41,403 INFO L93 Difference]: Finished difference Result 185 states and 199 transitions. [2020-10-13 23:39:41,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:39:41,404 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 96 [2020-10-13 23:39:41,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:41,405 INFO L225 Difference]: With dead ends: 185 [2020-10-13 23:39:41,406 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 23:39:41,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:39:41,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 23:39:41,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-13 23:39:41,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 23:39:41,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 111 transitions. [2020-10-13 23:39:41,414 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 111 transitions. Word has length 96 [2020-10-13 23:39:41,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:41,415 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 111 transitions. [2020-10-13 23:39:41,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:39:41,415 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 111 transitions. [2020-10-13 23:39:41,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 23:39:41,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:41,416 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:41,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:39:41,417 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:41,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:41,417 INFO L82 PathProgramCache]: Analyzing trace with hash -831837630, now seen corresponding path program 16 times [2020-10-13 23:39:41,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:41,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594014578] [2020-10-13 23:39:41,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:41,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:41,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:41,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:41,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:46,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:46,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 23:39:46,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:39:46,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:39:46,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:46,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:46,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:39:46,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:39:46,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:39:46,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:46,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:46,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:46,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:46,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:46,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:46,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:46,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:46,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:46,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:46,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:46,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:46,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:46,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:46,660 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-10-13 23:39:46,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594014578] [2020-10-13 23:39:46,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:46,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:39:46,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485453234] [2020-10-13 23:39:46,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:39:46,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:46,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:39:46,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:39:46,671 INFO L87 Difference]: Start difference. First operand 106 states and 111 transitions. Second operand 20 states. [2020-10-13 23:39:46,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:46,944 INFO L93 Difference]: Finished difference Result 194 states and 208 transitions. [2020-10-13 23:39:46,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:39:46,945 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2020-10-13 23:39:46,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:46,946 INFO L225 Difference]: With dead ends: 194 [2020-10-13 23:39:46,946 INFO L226 Difference]: Without dead ends: 111 [2020-10-13 23:39:46,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:39:46,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-13 23:39:46,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-10-13 23:39:46,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 23:39:46,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 116 transitions. [2020-10-13 23:39:46,956 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 116 transitions. Word has length 101 [2020-10-13 23:39:46,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:46,956 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 116 transitions. [2020-10-13 23:39:46,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:39:46,956 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 116 transitions. [2020-10-13 23:39:46,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 23:39:46,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:46,957 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:46,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:39:46,957 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:46,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:46,958 INFO L82 PathProgramCache]: Analyzing trace with hash 855925908, now seen corresponding path program 17 times [2020-10-13 23:39:46,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:46,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719972850] [2020-10-13 23:39:46,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:46,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:46,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:47,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:47,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:47,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:51,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:51,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 23:39:51,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:39:51,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:39:51,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:51,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:51,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:39:51,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 23:39:51,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 23:39:51,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:52,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:52,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:52,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:52,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:52,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:52,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:39:52,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:52,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:52,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:52,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:52,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:52,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:52,220 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-10-13 23:39:52,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719972850] [2020-10-13 23:39:52,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:52,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:39:52,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839452124] [2020-10-13 23:39:52,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:39:52,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:52,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:39:52,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:39:52,222 INFO L87 Difference]: Start difference. First operand 111 states and 116 transitions. Second operand 21 states. [2020-10-13 23:39:52,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:52,491 INFO L93 Difference]: Finished difference Result 203 states and 217 transitions. [2020-10-13 23:39:52,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:39:52,491 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 106 [2020-10-13 23:39:52,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:52,492 INFO L225 Difference]: With dead ends: 203 [2020-10-13 23:39:52,493 INFO L226 Difference]: Without dead ends: 116 [2020-10-13 23:39:52,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:39:52,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-13 23:39:52,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-10-13 23:39:52,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-13 23:39:52,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 121 transitions. [2020-10-13 23:39:52,498 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 121 transitions. Word has length 106 [2020-10-13 23:39:52,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:52,498 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 121 transitions. [2020-10-13 23:39:52,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:39:52,499 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 121 transitions. [2020-10-13 23:39:52,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 23:39:52,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:52,500 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:52,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:39:52,500 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:52,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:52,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1813726594, now seen corresponding path program 18 times [2020-10-13 23:39:52,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:52,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583795204] [2020-10-13 23:39:52,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:52,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:52,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:52,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:52,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:52,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:57,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:57,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 23:39:57,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:39:57,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 23:39:57,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:57,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:57,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:39:57,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 23:39:57,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:39:57,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:57,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:57,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:57,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:57,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:57,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:57,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:57,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:57,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:57,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:57,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:57,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:57,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:57,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:57,788 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-10-13 23:39:57,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583795204] [2020-10-13 23:39:57,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:57,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:39:57,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643760294] [2020-10-13 23:39:57,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:39:57,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:57,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:39:57,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:39:57,790 INFO L87 Difference]: Start difference. First operand 116 states and 121 transitions. Second operand 22 states. [2020-10-13 23:39:58,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:58,101 INFO L93 Difference]: Finished difference Result 212 states and 226 transitions. [2020-10-13 23:39:58,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:39:58,101 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 111 [2020-10-13 23:39:58,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:58,103 INFO L225 Difference]: With dead ends: 212 [2020-10-13 23:39:58,103 INFO L226 Difference]: Without dead ends: 121 [2020-10-13 23:39:58,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:39:58,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-13 23:39:58,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-10-13 23:39:58,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-13 23:39:58,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2020-10-13 23:39:58,110 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 111 [2020-10-13 23:39:58,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:58,111 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2020-10-13 23:39:58,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:39:58,111 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2020-10-13 23:39:58,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 23:39:58,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:58,112 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:58,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:39:58,112 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:58,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:58,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1230274516, now seen corresponding path program 19 times [2020-10-13 23:39:58,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:58,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127466067] [2020-10-13 23:39:58,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:58,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:58,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:58,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:58,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:03,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:03,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 23:40:03,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:40:03,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 23:40:03,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:03,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:03,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:40:03,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 23:40:03,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 23:40:03,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:03,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:03,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:03,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:03,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:03,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:03,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:03,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:03,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:03,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:03,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:03,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:03,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:03,441 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2020-10-13 23:40:03,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127466067] [2020-10-13 23:40:03,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:03,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:40:03,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732788264] [2020-10-13 23:40:03,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:40:03,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:03,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:40:03,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:40:03,444 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand 23 states. [2020-10-13 23:40:03,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:03,707 INFO L93 Difference]: Finished difference Result 221 states and 235 transitions. [2020-10-13 23:40:03,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:40:03,707 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 116 [2020-10-13 23:40:03,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:03,708 INFO L225 Difference]: With dead ends: 221 [2020-10-13 23:40:03,709 INFO L226 Difference]: Without dead ends: 126 [2020-10-13 23:40:03,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:40:03,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-13 23:40:03,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-10-13 23:40:03,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-13 23:40:03,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions. [2020-10-13 23:40:03,717 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 116 [2020-10-13 23:40:03,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:03,719 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions. [2020-10-13 23:40:03,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:40:03,719 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions. [2020-10-13 23:40:03,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-13 23:40:03,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:03,720 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:03,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:40:03,721 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:03,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:03,721 INFO L82 PathProgramCache]: Analyzing trace with hash 433828034, now seen corresponding path program 20 times [2020-10-13 23:40:03,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:03,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259552216] [2020-10-13 23:40:03,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:03,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:03,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:03,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:03,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:04,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:08,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:08,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 23:40:08,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:40:08,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:40:08,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:08,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:08,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:40:08,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-13 23:40:08,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:40:08,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:09,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:09,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:09,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:09,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:09,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:09,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:40:09,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:09,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:09,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:09,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:09,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:09,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:09,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-10-13 23:40:09,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259552216] [2020-10-13 23:40:09,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:09,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:40:09,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367002248] [2020-10-13 23:40:09,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:40:09,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:09,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:40:09,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:40:09,068 INFO L87 Difference]: Start difference. First operand 126 states and 131 transitions. Second operand 24 states. [2020-10-13 23:40:09,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:09,359 INFO L93 Difference]: Finished difference Result 230 states and 244 transitions. [2020-10-13 23:40:09,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:40:09,359 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 121 [2020-10-13 23:40:09,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:09,360 INFO L225 Difference]: With dead ends: 230 [2020-10-13 23:40:09,361 INFO L226 Difference]: Without dead ends: 131 [2020-10-13 23:40:09,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:40:09,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-13 23:40:09,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2020-10-13 23:40:09,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-13 23:40:09,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 136 transitions. [2020-10-13 23:40:09,368 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 136 transitions. Word has length 121 [2020-10-13 23:40:09,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:09,368 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 136 transitions. [2020-10-13 23:40:09,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:40:09,369 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 136 transitions. [2020-10-13 23:40:09,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 23:40:09,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:09,370 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:09,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:40:09,370 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:09,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:09,371 INFO L82 PathProgramCache]: Analyzing trace with hash 348752660, now seen corresponding path program 21 times [2020-10-13 23:40:09,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:09,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489497727] [2020-10-13 23:40:09,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:09,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:09,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:09,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:09,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:14,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:14,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 23:40:14,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:40:14,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:40:14,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:14,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:14,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:40:14,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 23:40:14,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 23:40:14,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:14,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:14,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:14,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:14,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:14,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:14,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:14,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:14,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:14,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:14,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:14,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:14,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:14,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2020-10-13 23:40:14,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489497727] [2020-10-13 23:40:14,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:14,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:40:14,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927324474] [2020-10-13 23:40:14,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:40:14,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:14,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:40:14,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:40:14,731 INFO L87 Difference]: Start difference. First operand 131 states and 136 transitions. Second operand 25 states. [2020-10-13 23:40:15,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:15,091 INFO L93 Difference]: Finished difference Result 239 states and 253 transitions. [2020-10-13 23:40:15,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:40:15,092 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2020-10-13 23:40:15,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:15,094 INFO L225 Difference]: With dead ends: 239 [2020-10-13 23:40:15,094 INFO L226 Difference]: Without dead ends: 136 [2020-10-13 23:40:15,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:40:15,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-13 23:40:15,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-10-13 23:40:15,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 23:40:15,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 141 transitions. [2020-10-13 23:40:15,101 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 141 transitions. Word has length 126 [2020-10-13 23:40:15,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:15,101 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 141 transitions. [2020-10-13 23:40:15,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:40:15,102 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 141 transitions. [2020-10-13 23:40:15,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 23:40:15,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:15,103 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:15,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:40:15,103 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:15,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:15,104 INFO L82 PathProgramCache]: Analyzing trace with hash 577530882, now seen corresponding path program 22 times [2020-10-13 23:40:15,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:15,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522101617] [2020-10-13 23:40:15,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:15,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:15,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:15,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:15,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:15,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:20,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:20,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 23:40:20,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:40:20,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:40:20,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:20,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:20,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:40:20,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-13 23:40:20,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:40:20,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:20,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:20,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:20,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:20,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:20,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:20,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:20,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:20,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:20,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:20,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:20,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:20,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:20,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-10-13 23:40:20,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522101617] [2020-10-13 23:40:20,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:20,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:40:20,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413904878] [2020-10-13 23:40:20,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:40:20,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:20,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:40:20,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:40:20,485 INFO L87 Difference]: Start difference. First operand 136 states and 141 transitions. Second operand 26 states. [2020-10-13 23:40:20,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:20,844 INFO L93 Difference]: Finished difference Result 248 states and 262 transitions. [2020-10-13 23:40:20,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:40:20,844 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 131 [2020-10-13 23:40:20,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:20,846 INFO L225 Difference]: With dead ends: 248 [2020-10-13 23:40:20,847 INFO L226 Difference]: Without dead ends: 141 [2020-10-13 23:40:20,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:40:20,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-13 23:40:20,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2020-10-13 23:40:20,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-13 23:40:20,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 146 transitions. [2020-10-13 23:40:20,855 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 146 transitions. Word has length 131 [2020-10-13 23:40:20,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:20,855 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 146 transitions. [2020-10-13 23:40:20,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:40:20,855 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 146 transitions. [2020-10-13 23:40:20,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-13 23:40:20,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:20,857 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:20,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:40:20,857 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:20,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:20,858 INFO L82 PathProgramCache]: Analyzing trace with hash 33785428, now seen corresponding path program 23 times [2020-10-13 23:40:20,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:20,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901904318] [2020-10-13 23:40:20,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:20,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:20,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:20,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:21,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:21,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:25,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:25,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-13 23:40:25,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:40:25,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 23:40:25,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:25,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:25,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:40:25,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:40:25,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 23:40:25,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:26,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:26,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:26,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:26,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:26,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:26,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:26,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:26,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:26,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:26,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:26,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:26,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:26,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2020-10-13 23:40:26,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901904318] [2020-10-13 23:40:26,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:26,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:40:26,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935819522] [2020-10-13 23:40:26,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:40:26,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:26,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:40:26,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:40:26,314 INFO L87 Difference]: Start difference. First operand 141 states and 146 transitions. Second operand 27 states. [2020-10-13 23:40:26,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:26,686 INFO L93 Difference]: Finished difference Result 257 states and 271 transitions. [2020-10-13 23:40:26,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:40:26,686 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 136 [2020-10-13 23:40:26,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:26,688 INFO L225 Difference]: With dead ends: 257 [2020-10-13 23:40:26,688 INFO L226 Difference]: Without dead ends: 146 [2020-10-13 23:40:26,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:40:26,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-13 23:40:26,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2020-10-13 23:40:26,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-13 23:40:26,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 151 transitions. [2020-10-13 23:40:26,695 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 151 transitions. Word has length 136 [2020-10-13 23:40:26,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:26,696 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 151 transitions. [2020-10-13 23:40:26,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:40:26,696 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 151 transitions. [2020-10-13 23:40:26,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-13 23:40:26,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:26,697 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:26,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:40:26,698 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:26,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:26,698 INFO L82 PathProgramCache]: Analyzing trace with hash -2020772030, now seen corresponding path program 24 times [2020-10-13 23:40:26,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:26,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745399060] [2020-10-13 23:40:26,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:26,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:26,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:26,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:27,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:31,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:31,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-13 23:40:31,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:40:31,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:40:31,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:31,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:31,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:40:31,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 23:40:31,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:40:31,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:32,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:32,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:32,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:32,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:32,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:32,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:32,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:32,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:32,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:32,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:32,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:32,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:32,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:32,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-10-13 23:40:32,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745399060] [2020-10-13 23:40:32,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:32,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:40:32,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422669141] [2020-10-13 23:40:32,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:40:32,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:32,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:40:32,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:40:32,142 INFO L87 Difference]: Start difference. First operand 146 states and 151 transitions. Second operand 28 states. [2020-10-13 23:40:32,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:32,472 INFO L93 Difference]: Finished difference Result 266 states and 280 transitions. [2020-10-13 23:40:32,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:40:32,473 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 141 [2020-10-13 23:40:32,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:32,474 INFO L225 Difference]: With dead ends: 266 [2020-10-13 23:40:32,474 INFO L226 Difference]: Without dead ends: 151 [2020-10-13 23:40:32,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:40:32,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-13 23:40:32,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2020-10-13 23:40:32,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-13 23:40:32,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 156 transitions. [2020-10-13 23:40:32,482 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 156 transitions. Word has length 141 [2020-10-13 23:40:32,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:32,482 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 156 transitions. [2020-10-13 23:40:32,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:40:32,482 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 156 transitions. [2020-10-13 23:40:32,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-13 23:40:32,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:32,484 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:32,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:40:32,485 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:32,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:32,485 INFO L82 PathProgramCache]: Analyzing trace with hash -693997164, now seen corresponding path program 25 times [2020-10-13 23:40:32,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:32,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291868427] [2020-10-13 23:40:32,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:32,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:32,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:32,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:33,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:37,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:37,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-13 23:40:37,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:40:37,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:40:37,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:37,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:37,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 23:40:37,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-13 23:40:37,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 23:40:37,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:37,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:37,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:37,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:37,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:37,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:37,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:37,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:37,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:37,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:37,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:37,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:37,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2020-10-13 23:40:37,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291868427] [2020-10-13 23:40:37,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:37,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:40:37,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812997521] [2020-10-13 23:40:37,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:40:37,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:37,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:40:37,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:40:37,925 INFO L87 Difference]: Start difference. First operand 151 states and 156 transitions. Second operand 29 states. [2020-10-13 23:40:38,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:38,242 INFO L93 Difference]: Finished difference Result 275 states and 289 transitions. [2020-10-13 23:40:38,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:40:38,242 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 146 [2020-10-13 23:40:38,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:38,243 INFO L225 Difference]: With dead ends: 275 [2020-10-13 23:40:38,244 INFO L226 Difference]: Without dead ends: 156 [2020-10-13 23:40:38,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:40:38,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-13 23:40:38,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2020-10-13 23:40:38,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-13 23:40:38,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 161 transitions. [2020-10-13 23:40:38,251 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 161 transitions. Word has length 146 [2020-10-13 23:40:38,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:38,252 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 161 transitions. [2020-10-13 23:40:38,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:40:38,252 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 161 transitions. [2020-10-13 23:40:38,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-13 23:40:38,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:38,253 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:38,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:40:38,254 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:38,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:38,254 INFO L82 PathProgramCache]: Analyzing trace with hash 33477250, now seen corresponding path program 26 times [2020-10-13 23:40:38,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:38,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903072830] [2020-10-13 23:40:38,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:38,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:38,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:38,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:40,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:43,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:43,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-13 23:40:43,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:40:43,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 23:40:43,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:43,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:43,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:40:43,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:40:43,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:40:43,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:43,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:43,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:43,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:43,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:43,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:43,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:43,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:43,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:43,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:43,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:43,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:43,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:43,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-10-13 23:40:43,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903072830] [2020-10-13 23:40:43,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:43,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 23:40:43,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677660000] [2020-10-13 23:40:43,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 23:40:43,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:43,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 23:40:43,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:40:43,801 INFO L87 Difference]: Start difference. First operand 156 states and 161 transitions. Second operand 30 states. [2020-10-13 23:40:44,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:44,255 INFO L93 Difference]: Finished difference Result 284 states and 298 transitions. [2020-10-13 23:40:44,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 23:40:44,256 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 151 [2020-10-13 23:40:44,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:44,258 INFO L225 Difference]: With dead ends: 284 [2020-10-13 23:40:44,258 INFO L226 Difference]: Without dead ends: 161 [2020-10-13 23:40:44,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:40:44,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-13 23:40:44,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2020-10-13 23:40:44,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-13 23:40:44,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 166 transitions. [2020-10-13 23:40:44,266 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 166 transitions. Word has length 151 [2020-10-13 23:40:44,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:44,266 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 166 transitions. [2020-10-13 23:40:44,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 23:40:44,267 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 166 transitions. [2020-10-13 23:40:44,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-13 23:40:44,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:44,268 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:44,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:40:44,268 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:44,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:44,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1320792876, now seen corresponding path program 27 times [2020-10-13 23:40:44,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:44,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642628411] [2020-10-13 23:40:44,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:44,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:44,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:44,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:44,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:45,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:49,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:49,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-13 23:40:49,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:40:49,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:40:49,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:49,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:49,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 23:40:49,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:40:49,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 23:40:49,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:49,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:49,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:49,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:49,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:49,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:49,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:49,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:49,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:49,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:49,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:49,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:49,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:49,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2020-10-13 23:40:49,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642628411] [2020-10-13 23:40:49,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:49,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 23:40:49,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074850604] [2020-10-13 23:40:49,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 23:40:49,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:49,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 23:40:49,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:40:49,919 INFO L87 Difference]: Start difference. First operand 161 states and 166 transitions. Second operand 31 states. [2020-10-13 23:40:50,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:50,408 INFO L93 Difference]: Finished difference Result 293 states and 307 transitions. [2020-10-13 23:40:50,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:40:50,408 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 156 [2020-10-13 23:40:50,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:50,412 INFO L225 Difference]: With dead ends: 293 [2020-10-13 23:40:50,413 INFO L226 Difference]: Without dead ends: 166 [2020-10-13 23:40:50,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:40:50,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-13 23:40:50,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2020-10-13 23:40:50,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-13 23:40:50,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 171 transitions. [2020-10-13 23:40:50,424 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 171 transitions. Word has length 156 [2020-10-13 23:40:50,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:50,424 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 171 transitions. [2020-10-13 23:40:50,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 23:40:50,424 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 171 transitions. [2020-10-13 23:40:50,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-13 23:40:50,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:50,425 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:50,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:40:50,434 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:50,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:50,434 INFO L82 PathProgramCache]: Analyzing trace with hash 25198018, now seen corresponding path program 28 times [2020-10-13 23:40:50,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:50,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21017187] [2020-10-13 23:40:50,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:50,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:50,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:50,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:51,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:55,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:55,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-13 23:40:55,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:40:55,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 23:40:55,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:55,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:55,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 23:40:55,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:40:55,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:40:55,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:56,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:56,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:56,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:56,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:56,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:56,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:56,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:56,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:56,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:56,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:56,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:56,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:56,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:40:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2020-10-13 23:40:56,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21017187] [2020-10-13 23:40:56,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:56,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 23:40:56,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817581056] [2020-10-13 23:40:56,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 23:40:56,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:56,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 23:40:56,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:40:56,044 INFO L87 Difference]: Start difference. First operand 166 states and 171 transitions. Second operand 32 states. [2020-10-13 23:40:56,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:56,465 INFO L93 Difference]: Finished difference Result 302 states and 316 transitions. [2020-10-13 23:40:56,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 23:40:56,465 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 161 [2020-10-13 23:40:56,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:56,466 INFO L225 Difference]: With dead ends: 302 [2020-10-13 23:40:56,466 INFO L226 Difference]: Without dead ends: 171 [2020-10-13 23:40:56,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:40:56,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-13 23:40:56,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2020-10-13 23:40:56,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-13 23:40:56,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 176 transitions. [2020-10-13 23:40:56,480 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 176 transitions. Word has length 161 [2020-10-13 23:40:56,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:56,481 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 176 transitions. [2020-10-13 23:40:56,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 23:40:56,481 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 176 transitions. [2020-10-13 23:40:56,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-13 23:40:56,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:56,483 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:56,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:40:56,483 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:56,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:56,484 INFO L82 PathProgramCache]: Analyzing trace with hash 160372756, now seen corresponding path program 29 times [2020-10-13 23:40:56,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:56,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309716673] [2020-10-13 23:40:56,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:56,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:56,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:56,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:57,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:01,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:01,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-13 23:41:01,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:41:01,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 23:41:01,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:01,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:01,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 23:41:01,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:41:01,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 23:41:01,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:02,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:02,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:02,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:02,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:02,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:02,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:02,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:02,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:02,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:02,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:02,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:02,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:02,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:02,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2020-10-13 23:41:02,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309716673] [2020-10-13 23:41:02,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:02,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 23:41:02,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741278227] [2020-10-13 23:41:02,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 23:41:02,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:02,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 23:41:02,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:41:02,096 INFO L87 Difference]: Start difference. First operand 171 states and 176 transitions. Second operand 33 states. [2020-10-13 23:41:02,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:02,525 INFO L93 Difference]: Finished difference Result 311 states and 325 transitions. [2020-10-13 23:41:02,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 23:41:02,529 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 166 [2020-10-13 23:41:02,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:02,531 INFO L225 Difference]: With dead ends: 311 [2020-10-13 23:41:02,531 INFO L226 Difference]: Without dead ends: 176 [2020-10-13 23:41:02,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:41:02,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-13 23:41:02,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2020-10-13 23:41:02,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-13 23:41:02,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 181 transitions. [2020-10-13 23:41:02,539 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 181 transitions. Word has length 166 [2020-10-13 23:41:02,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:02,539 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 181 transitions. [2020-10-13 23:41:02,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 23:41:02,540 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 181 transitions. [2020-10-13 23:41:02,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-13 23:41:02,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:02,541 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:02,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:41:02,541 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:02,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:02,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1395492606, now seen corresponding path program 30 times [2020-10-13 23:41:02,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:02,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943265916] [2020-10-13 23:41:02,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:02,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:02,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:02,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:02,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:03,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:07,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:07,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-13 23:41:07,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:41:07,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 23:41:07,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:07,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:07,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 23:41:07,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:41:07,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:41:07,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:08,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:08,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:08,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:08,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:08,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:08,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:08,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:41:08,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:08,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:08,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:08,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:08,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:08,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-10-13 23:41:08,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943265916] [2020-10-13 23:41:08,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:08,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 23:41:08,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639696282] [2020-10-13 23:41:08,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 23:41:08,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:08,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 23:41:08,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:41:08,174 INFO L87 Difference]: Start difference. First operand 176 states and 181 transitions. Second operand 34 states. [2020-10-13 23:41:08,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:08,656 INFO L93 Difference]: Finished difference Result 320 states and 334 transitions. [2020-10-13 23:41:08,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 23:41:08,656 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 171 [2020-10-13 23:41:08,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:08,658 INFO L225 Difference]: With dead ends: 320 [2020-10-13 23:41:08,658 INFO L226 Difference]: Without dead ends: 181 [2020-10-13 23:41:08,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:41:08,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-13 23:41:08,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2020-10-13 23:41:08,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-13 23:41:08,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 186 transitions. [2020-10-13 23:41:08,669 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 186 transitions. Word has length 171 [2020-10-13 23:41:08,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:08,669 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 186 transitions. [2020-10-13 23:41:08,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 23:41:08,670 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 186 transitions. [2020-10-13 23:41:08,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-13 23:41:08,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:08,671 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:08,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:41:08,671 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:08,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:08,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1340288172, now seen corresponding path program 31 times [2020-10-13 23:41:08,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:08,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230520056] [2020-10-13 23:41:08,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:08,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:08,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:08,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:10,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:13,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:13,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-13 23:41:13,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:41:13,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-13 23:41:13,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:13,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:13,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 23:41:13,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-13 23:41:13,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 23:41:13,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:14,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:14,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:14,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:14,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:14,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:14,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:14,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:14,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:14,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:14,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:14,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:14,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:14,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:14,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2480 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2020-10-13 23:41:14,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230520056] [2020-10-13 23:41:14,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:14,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 23:41:14,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002822219] [2020-10-13 23:41:14,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 23:41:14,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:14,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 23:41:14,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:41:14,365 INFO L87 Difference]: Start difference. First operand 181 states and 186 transitions. Second operand 35 states. [2020-10-13 23:41:14,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:14,772 INFO L93 Difference]: Finished difference Result 329 states and 343 transitions. [2020-10-13 23:41:14,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 23:41:14,773 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 176 [2020-10-13 23:41:14,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:14,775 INFO L225 Difference]: With dead ends: 329 [2020-10-13 23:41:14,775 INFO L226 Difference]: Without dead ends: 186 [2020-10-13 23:41:14,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:41:14,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-13 23:41:14,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2020-10-13 23:41:14,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-13 23:41:14,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 191 transitions. [2020-10-13 23:41:14,784 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 191 transitions. Word has length 176 [2020-10-13 23:41:14,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:14,784 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 191 transitions. [2020-10-13 23:41:14,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 23:41:14,784 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 191 transitions. [2020-10-13 23:41:14,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-13 23:41:14,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:14,785 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:14,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:41:14,786 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:14,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:14,786 INFO L82 PathProgramCache]: Analyzing trace with hash -508246974, now seen corresponding path program 32 times [2020-10-13 23:41:14,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:14,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543898376] [2020-10-13 23:41:14,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:14,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:14,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:15,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:16,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:19,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:19,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-13 23:41:19,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:41:19,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:41:19,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:19,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:19,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 23:41:19,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-13 23:41:19,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:41:19,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:20,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:20,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:20,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:20,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:20,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:20,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:20,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:20,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:20,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:20,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:20,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:20,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:20,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:20,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2640 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2020-10-13 23:41:20,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543898376] [2020-10-13 23:41:20,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:20,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 23:41:20,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705416391] [2020-10-13 23:41:20,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 23:41:20,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:20,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 23:41:20,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:41:20,475 INFO L87 Difference]: Start difference. First operand 186 states and 191 transitions. Second operand 36 states. [2020-10-13 23:41:20,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:20,917 INFO L93 Difference]: Finished difference Result 338 states and 352 transitions. [2020-10-13 23:41:20,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 23:41:20,917 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 181 [2020-10-13 23:41:20,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:20,919 INFO L225 Difference]: With dead ends: 338 [2020-10-13 23:41:20,920 INFO L226 Difference]: Without dead ends: 191 [2020-10-13 23:41:20,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:41:20,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-13 23:41:20,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2020-10-13 23:41:20,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-13 23:41:20,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 196 transitions. [2020-10-13 23:41:20,928 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 196 transitions. Word has length 181 [2020-10-13 23:41:20,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:20,929 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 196 transitions. [2020-10-13 23:41:20,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 23:41:20,929 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 196 transitions. [2020-10-13 23:41:20,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-13 23:41:20,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:20,930 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:20,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:41:20,930 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:20,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:20,931 INFO L82 PathProgramCache]: Analyzing trace with hash -829456748, now seen corresponding path program 33 times [2020-10-13 23:41:20,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:20,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763101385] [2020-10-13 23:41:20,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:20,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:21,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:21,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:21,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:25,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:25,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-13 23:41:25,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:41:25,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-13 23:41:25,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:25,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:25,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 23:41:25,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-13 23:41:25,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 23:41:25,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:26,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:26,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:26,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:26,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:26,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:26,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:26,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:26,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:26,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:26,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:26,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:26,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:41:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2020-10-13 23:41:26,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763101385] [2020-10-13 23:41:26,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:26,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 23:41:26,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136569369] [2020-10-13 23:41:26,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 23:41:26,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:26,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 23:41:26,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:41:26,682 INFO L87 Difference]: Start difference. First operand 191 states and 196 transitions. Second operand 37 states. [2020-10-13 23:41:27,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:27,177 INFO L93 Difference]: Finished difference Result 347 states and 361 transitions. [2020-10-13 23:41:27,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 23:41:27,177 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 186 [2020-10-13 23:41:27,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:27,178 INFO L225 Difference]: With dead ends: 347 [2020-10-13 23:41:27,179 INFO L226 Difference]: Without dead ends: 196 [2020-10-13 23:41:27,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:41:27,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-13 23:41:27,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2020-10-13 23:41:27,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-13 23:41:27,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 201 transitions. [2020-10-13 23:41:27,187 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 201 transitions. Word has length 186 [2020-10-13 23:41:27,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:27,187 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 201 transitions. [2020-10-13 23:41:27,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 23:41:27,188 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 201 transitions. [2020-10-13 23:41:27,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-13 23:41:27,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:27,189 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:27,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:41:27,189 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:27,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:27,190 INFO L82 PathProgramCache]: Analyzing trace with hash 887578498, now seen corresponding path program 34 times [2020-10-13 23:41:27,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:27,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124704252] [2020-10-13 23:41:27,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:27,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:27,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:27,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:29,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:32,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:32,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-13 23:41:32,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:41:32,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:41:32,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:32,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:32,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 23:41:32,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 23:41:32,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:41:32,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:32,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:32,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:32,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:32,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:32,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:32,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:32,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:32,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:32,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:32,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:32,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:32,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:32,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2020-10-13 23:41:32,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124704252] [2020-10-13 23:41:32,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:32,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 23:41:32,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552194760] [2020-10-13 23:41:32,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 23:41:32,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:32,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 23:41:32,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:41:32,952 INFO L87 Difference]: Start difference. First operand 196 states and 201 transitions. Second operand 38 states. [2020-10-13 23:41:33,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:33,493 INFO L93 Difference]: Finished difference Result 356 states and 370 transitions. [2020-10-13 23:41:33,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 23:41:33,493 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 191 [2020-10-13 23:41:33,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:33,495 INFO L225 Difference]: With dead ends: 356 [2020-10-13 23:41:33,495 INFO L226 Difference]: Without dead ends: 201 [2020-10-13 23:41:33,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:41:33,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-13 23:41:33,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2020-10-13 23:41:33,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-13 23:41:33,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 206 transitions. [2020-10-13 23:41:33,502 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 206 transitions. Word has length 191 [2020-10-13 23:41:33,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:33,503 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 206 transitions. [2020-10-13 23:41:33,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 23:41:33,503 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 206 transitions. [2020-10-13 23:41:33,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-10-13 23:41:33,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:33,504 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:33,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:41:33,505 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:33,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:33,505 INFO L82 PathProgramCache]: Analyzing trace with hash -410576428, now seen corresponding path program 35 times [2020-10-13 23:41:33,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:33,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042734652] [2020-10-13 23:41:33,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:33,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:33,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:33,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:33,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:35,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:38,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:38,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-13 23:41:38,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:41:38,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-13 23:41:38,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:38,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:38,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 23:41:38,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 122 [2020-10-13 23:41:38,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 23:41:38,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:39,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:39,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:39,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:39,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:39,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:39,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:39,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:39,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:39,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:39,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:39,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:39,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:39,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2020-10-13 23:41:39,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042734652] [2020-10-13 23:41:39,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:39,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 23:41:39,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460040582] [2020-10-13 23:41:39,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 23:41:39,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:39,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 23:41:39,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:41:39,363 INFO L87 Difference]: Start difference. First operand 201 states and 206 transitions. Second operand 39 states. [2020-10-13 23:41:39,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:39,833 INFO L93 Difference]: Finished difference Result 365 states and 379 transitions. [2020-10-13 23:41:39,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 23:41:39,833 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 196 [2020-10-13 23:41:39,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:39,835 INFO L225 Difference]: With dead ends: 365 [2020-10-13 23:41:39,835 INFO L226 Difference]: Without dead ends: 206 [2020-10-13 23:41:39,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:41:39,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-13 23:41:39,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2020-10-13 23:41:39,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-13 23:41:39,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 211 transitions. [2020-10-13 23:41:39,845 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 211 transitions. Word has length 196 [2020-10-13 23:41:39,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:39,845 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 211 transitions. [2020-10-13 23:41:39,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 23:41:39,845 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 211 transitions. [2020-10-13 23:41:39,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-13 23:41:39,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:39,847 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:39,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:41:39,847 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:39,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:39,848 INFO L82 PathProgramCache]: Analyzing trace with hash -232109374, now seen corresponding path program 36 times [2020-10-13 23:41:39,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:39,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134971050] [2020-10-13 23:41:39,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:39,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:40,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:40,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:42,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:44,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:44,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-13 23:41:44,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:41:44,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-13 23:41:44,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:44,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:44,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 23:41:44,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-13 23:41:44,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:41:44,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:45,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:45,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:45,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:45,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:45,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:45,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:45,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:41:45,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:45,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:45,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:45,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:45,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:45,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2020-10-13 23:41:45,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134971050] [2020-10-13 23:41:45,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:45,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 23:41:45,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589442280] [2020-10-13 23:41:45,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 23:41:45,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:45,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 23:41:45,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:41:45,764 INFO L87 Difference]: Start difference. First operand 206 states and 211 transitions. Second operand 40 states. [2020-10-13 23:41:46,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:46,210 INFO L93 Difference]: Finished difference Result 374 states and 388 transitions. [2020-10-13 23:41:46,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 23:41:46,211 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 201 [2020-10-13 23:41:46,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:46,213 INFO L225 Difference]: With dead ends: 374 [2020-10-13 23:41:46,213 INFO L226 Difference]: Without dead ends: 211 [2020-10-13 23:41:46,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:41:46,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-13 23:41:46,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2020-10-13 23:41:46,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-13 23:41:46,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 216 transitions. [2020-10-13 23:41:46,221 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 216 transitions. Word has length 201 [2020-10-13 23:41:46,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:46,222 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 216 transitions. [2020-10-13 23:41:46,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 23:41:46,222 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 216 transitions. [2020-10-13 23:41:46,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-10-13 23:41:46,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:46,223 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:46,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:41:46,224 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:46,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:46,224 INFO L82 PathProgramCache]: Analyzing trace with hash -693918444, now seen corresponding path program 37 times [2020-10-13 23:41:46,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:46,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124878131] [2020-10-13 23:41:46,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:46,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:46,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:46,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:46,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:48,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:51,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:51,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-10-13 23:41:51,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:41:51,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:41:51,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:51,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:51,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 23:41:51,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:41:51,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 23:41:51,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:52,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:52,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:52,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:52,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:52,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:52,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:52,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:52,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:52,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:52,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:52,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:52,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:52,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3515 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2020-10-13 23:41:52,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124878131] [2020-10-13 23:41:52,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:52,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 23:41:52,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861279652] [2020-10-13 23:41:52,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 23:41:52,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:52,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 23:41:52,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:41:52,110 INFO L87 Difference]: Start difference. First operand 211 states and 216 transitions. Second operand 41 states. [2020-10-13 23:41:52,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:52,658 INFO L93 Difference]: Finished difference Result 383 states and 397 transitions. [2020-10-13 23:41:52,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 23:41:52,664 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 206 [2020-10-13 23:41:52,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:52,665 INFO L225 Difference]: With dead ends: 383 [2020-10-13 23:41:52,665 INFO L226 Difference]: Without dead ends: 216 [2020-10-13 23:41:52,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:41:52,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-13 23:41:52,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2020-10-13 23:41:52,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-13 23:41:52,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 221 transitions. [2020-10-13 23:41:52,672 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 221 transitions. Word has length 206 [2020-10-13 23:41:52,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:52,672 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 221 transitions. [2020-10-13 23:41:52,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 23:41:52,672 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 221 transitions. [2020-10-13 23:41:52,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-13 23:41:52,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:52,674 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:52,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:41:52,674 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:52,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:52,674 INFO L82 PathProgramCache]: Analyzing trace with hash 473794050, now seen corresponding path program 38 times [2020-10-13 23:41:52,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:52,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892297891] [2020-10-13 23:41:52,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:52,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:52,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:53,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:54,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:57,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:57,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-13 23:41:57,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:41:57,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 23:41:57,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:57,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:57,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 23:41:57,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 131 [2020-10-13 23:41:57,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:41:57,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:58,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:58,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:58,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:58,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:58,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:58,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:41:58,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:58,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:58,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:58,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:58,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:58,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3705 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2020-10-13 23:41:58,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892297891] [2020-10-13 23:41:58,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:58,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 23:41:58,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933934773] [2020-10-13 23:41:58,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 23:41:58,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:58,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 23:41:58,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:41:58,670 INFO L87 Difference]: Start difference. First operand 216 states and 221 transitions. Second operand 42 states. [2020-10-13 23:41:59,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:59,172 INFO L93 Difference]: Finished difference Result 392 states and 406 transitions. [2020-10-13 23:41:59,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 23:41:59,173 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 211 [2020-10-13 23:41:59,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:59,175 INFO L225 Difference]: With dead ends: 392 [2020-10-13 23:41:59,175 INFO L226 Difference]: Without dead ends: 221 [2020-10-13 23:41:59,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:41:59,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-13 23:41:59,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2020-10-13 23:41:59,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-13 23:41:59,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 226 transitions. [2020-10-13 23:41:59,181 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 226 transitions. Word has length 211 [2020-10-13 23:41:59,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:59,181 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 226 transitions. [2020-10-13 23:41:59,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 23:41:59,182 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 226 transitions. [2020-10-13 23:41:59,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-10-13 23:41:59,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:59,183 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:59,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:41:59,183 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:59,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:59,184 INFO L82 PathProgramCache]: Analyzing trace with hash -796581804, now seen corresponding path program 39 times [2020-10-13 23:41:59,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:59,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097014003] [2020-10-13 23:41:59,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:59,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:59,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:59,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:01,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:04,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:04,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-10-13 23:42:04,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:42:04,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-13 23:42:04,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:04,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:04,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 23:42:04,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-13 23:42:04,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 23:42:04,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:05,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:05,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:05,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:05,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:05,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:05,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:05,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:05,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:05,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:05,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:05,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:05,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:05,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:05,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3900 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2020-10-13 23:42:05,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097014003] [2020-10-13 23:42:05,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:05,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 23:42:05,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757398372] [2020-10-13 23:42:05,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 23:42:05,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:05,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 23:42:05,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 23:42:05,217 INFO L87 Difference]: Start difference. First operand 221 states and 226 transitions. Second operand 43 states. [2020-10-13 23:42:05,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:05,809 INFO L93 Difference]: Finished difference Result 401 states and 415 transitions. [2020-10-13 23:42:05,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 23:42:05,809 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 216 [2020-10-13 23:42:05,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:05,811 INFO L225 Difference]: With dead ends: 401 [2020-10-13 23:42:05,811 INFO L226 Difference]: Without dead ends: 226 [2020-10-13 23:42:05,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 23:42:05,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-13 23:42:05,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2020-10-13 23:42:05,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-13 23:42:05,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 231 transitions. [2020-10-13 23:42:05,820 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 231 transitions. Word has length 216 [2020-10-13 23:42:05,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:05,820 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 231 transitions. [2020-10-13 23:42:05,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 23:42:05,820 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 231 transitions. [2020-10-13 23:42:05,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-13 23:42:05,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:05,822 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:05,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 23:42:05,822 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:05,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:05,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1826689346, now seen corresponding path program 40 times [2020-10-13 23:42:05,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:05,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187953298] [2020-10-13 23:42:05,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:05,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:05,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:06,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:06,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:08,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:10,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:10,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-13 23:42:10,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:42:10,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-13 23:42:10,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:10,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:10,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 23:42:10,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:10,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:42:10,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:11,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:11,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:11,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:11,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:11,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:11,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:11,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:11,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:11,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:11,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:11,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:11,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:11,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2020-10-13 23:42:11,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187953298] [2020-10-13 23:42:11,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:11,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 23:42:11,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100440710] [2020-10-13 23:42:11,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 23:42:11,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:11,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 23:42:11,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 23:42:11,886 INFO L87 Difference]: Start difference. First operand 226 states and 231 transitions. Second operand 44 states. [2020-10-13 23:42:12,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:12,413 INFO L93 Difference]: Finished difference Result 410 states and 424 transitions. [2020-10-13 23:42:12,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 23:42:12,414 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 221 [2020-10-13 23:42:12,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:12,415 INFO L225 Difference]: With dead ends: 410 [2020-10-13 23:42:12,415 INFO L226 Difference]: Without dead ends: 231 [2020-10-13 23:42:12,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 23:42:12,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-13 23:42:12,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2020-10-13 23:42:12,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-13 23:42:12,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 236 transitions. [2020-10-13 23:42:12,422 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 236 transitions. Word has length 221 [2020-10-13 23:42:12,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:12,422 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 236 transitions. [2020-10-13 23:42:12,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 23:42:12,423 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 236 transitions. [2020-10-13 23:42:12,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-13 23:42:12,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:12,424 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:12,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 23:42:12,424 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:12,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:12,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1657506708, now seen corresponding path program 41 times [2020-10-13 23:42:12,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:12,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523725895] [2020-10-13 23:42:12,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:12,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:12,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:12,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:12,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:15,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking...