/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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_init3_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 17:55:54,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 17:55:54,720 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 17:55:54,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 17:55:54,746 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 17:55:54,747 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 17:55:54,749 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 17:55:54,751 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 17:55:54,753 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 17:55:54,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 17:55:54,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 17:55:54,756 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 17:55:54,757 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 17:55:54,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 17:55:54,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 17:55:54,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 17:55:54,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 17:55:54,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 17:55:54,764 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 17:55:54,766 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 17:55:54,769 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 17:55:54,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 17:55:54,774 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 17:55:54,775 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 17:55:54,779 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 17:55:54,780 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 17:55:54,780 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 17:55:54,782 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 17:55:54,783 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 17:55:54,785 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 17:55:54,786 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 17:55:54,787 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 17:55:54,788 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 17:55:54,789 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 17:55:54,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 17:55:54,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 17:55:54,793 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 17:55:54,794 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 17:55:54,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 17:55:54,795 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 17:55:54,796 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 17:55:54,797 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 [2020-10-14 17:55:54,853 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 17:55:54,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 17:55:54,855 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 17:55:54,856 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 17:55:54,857 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 17:55:54,857 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 17:55:54,857 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 17:55:54,857 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 17:55:54,858 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 17:55:54,858 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 17:55:54,858 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 17:55:54,858 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 17:55:54,859 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 17:55:54,859 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 17:55:54,859 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 17:55:54,859 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 17:55:54,859 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 17:55:54,860 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 17:55:54,860 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 17:55:54,861 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 17:55:54,861 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 17:55:54,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:55:54,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 17:55:54,862 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 17:55:54,862 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 17:55:54,862 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 17:55:54,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 17:55:54,863 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 17:55:54,863 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 17:55:54,864 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 17:55:55,216 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 17:55:55,230 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 17:55:55,233 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 17:55:55,235 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 17:55:55,236 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 17:55:55,236 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init3_ground-1.i [2020-10-14 17:55:55,317 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/036e3703d/46fa6b66eec444cf8467b5ea45e0f641/FLAGee3982546 [2020-10-14 17:55:55,820 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 17:55:55,821 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init3_ground-1.i [2020-10-14 17:55:55,828 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/036e3703d/46fa6b66eec444cf8467b5ea45e0f641/FLAGee3982546 [2020-10-14 17:55:56,196 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/036e3703d/46fa6b66eec444cf8467b5ea45e0f641 [2020-10-14 17:55:56,207 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 17:55:56,209 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 17:55:56,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 17:55:56,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 17:55:56,214 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 17:55:56,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:55:56" (1/1) ... [2020-10-14 17:55:56,219 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79d9afb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:55:56, skipping insertion in model container [2020-10-14 17:55:56,219 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:55:56" (1/1) ... [2020-10-14 17:55:56,227 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 17:55:56,246 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 17:55:56,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:55:56,432 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 17:55:56,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:55:56,472 INFO L208 MainTranslator]: Completed translation [2020-10-14 17:55:56,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:55:56 WrapperNode [2020-10-14 17:55:56,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 17:55:56,473 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 17:55:56,474 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 17:55:56,474 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 17:55:56,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:55:56" (1/1) ... [2020-10-14 17:55:56,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:55:56" (1/1) ... [2020-10-14 17:55:56,596 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:55:56" (1/1) ... [2020-10-14 17:55:56,597 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:55:56" (1/1) ... [2020-10-14 17:55:56,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:55:56" (1/1) ... [2020-10-14 17:55:56,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:55:56" (1/1) ... [2020-10-14 17:55:56,632 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:55:56" (1/1) ... [2020-10-14 17:55:56,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 17:55:56,637 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 17:55:56,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 17:55:56,638 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 17:55:56,638 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:55:56" (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 [2020-10-14 17:55:56,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 17:55:56,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 17:55:56,701 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 17:55:56,701 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 17:55:56,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 17:55:56,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 17:55:56,702 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 17:55:56,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 17:55:56,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 17:55:56,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 17:55:56,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 17:55:56,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 17:55:56,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 17:55:56,928 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 17:55:56,928 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-14 17:55:56,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:55:56 BoogieIcfgContainer [2020-10-14 17:55:56,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 17:55:56,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 17:55:56,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 17:55:56,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 17:55:56,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:55:56" (1/3) ... [2020-10-14 17:55:56,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@766e584d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:55:56, skipping insertion in model container [2020-10-14 17:55:56,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:55:56" (2/3) ... [2020-10-14 17:55:56,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@766e584d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:55:56, skipping insertion in model container [2020-10-14 17:55:56,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:55:56" (3/3) ... [2020-10-14 17:55:56,942 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init3_ground-1.i [2020-10-14 17:55:56,954 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 17:55:56,961 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 17:55:56,977 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 17:55:57,023 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 17:55:57,023 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 17:55:57,024 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 17:55:57,024 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 17:55:57,024 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 17:55:57,025 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 17:55:57,025 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 17:55:57,025 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 17:55:57,052 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-14 17:55:57,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 17:55:57,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:57,062 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:55:57,062 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:57,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:57,069 INFO L82 PathProgramCache]: Analyzing trace with hash 578824766, now seen corresponding path program 1 times [2020-10-14 17:55:57,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:57,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377900039] [2020-10-14 17:55:57,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:57,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:57,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:57,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:57,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:57,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:57,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 17:55:57,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:55:57,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-10-14 17:55:57,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:57,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:57,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:55:57,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:55:57,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:55:57,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 17:55:57,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:57,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:57,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:57,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:57,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:57,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:57,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 17:55:57,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:57,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:57,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:57,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:57,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:57,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:55:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:55:57,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377900039] [2020-10-14 17:55:57,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:55:57,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 17:55:57,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048690823] [2020-10-14 17:55:57,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 17:55:57,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:57,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 17:55:57,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 17:55:57,691 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 4 states. [2020-10-14 17:55:57,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:57,816 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2020-10-14 17:55:57,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 17:55:57,818 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-14 17:55:57,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:57,826 INFO L225 Difference]: With dead ends: 50 [2020-10-14 17:55:57,826 INFO L226 Difference]: Without dead ends: 25 [2020-10-14 17:55:57,830 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 [2020-10-14 17:55:57,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-14 17:55:57,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-14 17:55:57,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 17:55:57,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-14 17:55:57,870 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2020-10-14 17:55:57,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:57,871 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-14 17:55:57,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 17:55:57,871 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-14 17:55:57,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 17:55:57,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:57,872 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] [2020-10-14 17:55:57,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 17:55:57,873 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:57,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:57,874 INFO L82 PathProgramCache]: Analyzing trace with hash 3753729, now seen corresponding path program 1 times [2020-10-14 17:55:57,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:57,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102741087] [2020-10-14 17:55:57,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:57,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:57,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:57,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:57,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:58,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:58,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:58,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 17:55:58,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:55:58,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1092 [2020-10-14 17:55:58,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:58,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:58,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 17:55:58,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:55:58,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 17:55:58,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:55:59,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:59,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:59,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:59,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:59,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:59,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:59,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 17:55:59,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:59,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:59,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:59,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:59,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:59,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:55:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 17:55:59,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102741087] [2020-10-14 17:55:59,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:59,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:55:59,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460353769] [2020-10-14 17:55:59,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:55:59,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:59,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:55:59,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:55:59,174 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 10 states. [2020-10-14 17:55:59,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:59,484 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-10-14 17:55:59,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 17:55:59,485 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-14 17:55:59,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:59,489 INFO L225 Difference]: With dead ends: 44 [2020-10-14 17:55:59,489 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 17:55:59,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:55:59,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 17:55:59,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2020-10-14 17:55:59,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 17:55:59,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-14 17:55:59,507 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 20 [2020-10-14 17:55:59,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:59,508 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-14 17:55:59,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:55:59,509 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-14 17:55:59,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 17:55:59,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:59,510 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:55:59,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 17:55:59,511 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:59,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:59,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1974713063, now seen corresponding path program 2 times [2020-10-14 17:55:59,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:59,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756248585] [2020-10-14 17:55:59,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:59,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:59,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:59,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:59,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:00,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:00,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 17:56:00,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:56:00,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 600 [2020-10-14 17:56:00,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:00,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:00,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:56:00,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:56:00,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 17:56:00,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:56:00,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:56:00,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:00,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:00,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:00,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:56:00,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:00,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:56:00,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:00,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:00,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:56:00,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:00,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:56:00,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:56:00,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 17:56:00,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756248585] [2020-10-14 17:56:00,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:56:00,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 17:56:00,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457513955] [2020-10-14 17:56:00,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 17:56:00,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:56:00,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 17:56:00,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:56:00,264 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 11 states. [2020-10-14 17:56:00,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:56:00,560 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-10-14 17:56:00,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 17:56:00,561 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-10-14 17:56:00,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:56:00,567 INFO L225 Difference]: With dead ends: 53 [2020-10-14 17:56:00,567 INFO L226 Difference]: Without dead ends: 51 [2020-10-14 17:56:00,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:56:00,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-14 17:56:00,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2020-10-14 17:56:00,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 17:56:00,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-10-14 17:56:00,591 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 21 [2020-10-14 17:56:00,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:56:00,591 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-10-14 17:56:00,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 17:56:00,592 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-10-14 17:56:00,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 17:56:00,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:56:00,594 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:56:00,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 17:56:00,594 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:56:00,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:56:00,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1117325825, now seen corresponding path program 3 times [2020-10-14 17:56:00,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:56:00,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849891729] [2020-10-14 17:56:00,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:56:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:00,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:00,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:00,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:00,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:01,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:01,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 17:56:01,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:56:01,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 943 [2020-10-14 17:56:01,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:01,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:01,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 17:56:01,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:56:01,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 17:56:01,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:56:01,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:56:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:01,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:01,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:01,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:56:01,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:01,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:56:01,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:01,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:01,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:56:01,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:01,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:56:01,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:56:01,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 17:56:01,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849891729] [2020-10-14 17:56:01,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:56:01,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:56:01,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738944868] [2020-10-14 17:56:01,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:56:01,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:56:01,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:56:01,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:56:01,723 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 12 states. [2020-10-14 17:56:02,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:56:02,019 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2020-10-14 17:56:02,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 17:56:02,019 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-10-14 17:56:02,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:56:02,021 INFO L225 Difference]: With dead ends: 55 [2020-10-14 17:56:02,021 INFO L226 Difference]: Without dead ends: 53 [2020-10-14 17:56:02,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:56:02,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-14 17:56:02,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2020-10-14 17:56:02,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 17:56:02,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-14 17:56:02,029 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 22 [2020-10-14 17:56:02,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:56:02,030 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-14 17:56:02,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:56:02,030 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-14 17:56:02,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 17:56:02,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:56:02,031 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:56:02,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 17:56:02,032 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:56:02,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:56:02,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1813716455, now seen corresponding path program 4 times [2020-10-14 17:56:02,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:56:02,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568180989] [2020-10-14 17:56:02,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:56:02,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:02,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:02,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:02,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:02,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:02,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:02,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 17:56:02,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:56:02,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 671 [2020-10-14 17:56:02,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:02,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:02,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:56:02,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:56:02,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 17:56:02,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:56:02,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:56:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:02,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:02,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:02,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:56:02,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:02,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:56:02,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:02,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:02,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:56:02,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:02,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:56:02,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:56:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 17:56:02,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568180989] [2020-10-14 17:56:02,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:56:02,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 17:56:02,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87154076] [2020-10-14 17:56:02,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 17:56:02,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:56:02,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 17:56:02,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:56:02,902 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 13 states. [2020-10-14 17:56:03,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:56:03,176 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2020-10-14 17:56:03,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 17:56:03,177 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2020-10-14 17:56:03,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:56:03,179 INFO L225 Difference]: With dead ends: 57 [2020-10-14 17:56:03,180 INFO L226 Difference]: Without dead ends: 55 [2020-10-14 17:56:03,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:56:03,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-14 17:56:03,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 36. [2020-10-14 17:56:03,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 17:56:03,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-10-14 17:56:03,189 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 23 [2020-10-14 17:56:03,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:56:03,189 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-10-14 17:56:03,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 17:56:03,190 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-10-14 17:56:03,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 17:56:03,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:56:03,191 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:56:03,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 17:56:03,191 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:56:03,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:56:03,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1813253377, now seen corresponding path program 5 times [2020-10-14 17:56:03,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:56:03,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677686813] [2020-10-14 17:56:03,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:56:03,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:03,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:03,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:03,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:03,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:04,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:04,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 17:56:04,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:56:04,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 938 [2020-10-14 17:56:04,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:04,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:04,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 17:56:04,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:56:04,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 17:56:04,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:56:04,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:56:04,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:04,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:04,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:04,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:56:04,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:04,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:56:04,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:04,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:04,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:56:04,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:04,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:56:04,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:56:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 17:56:04,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677686813] [2020-10-14 17:56:04,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:56:04,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:56:04,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029658587] [2020-10-14 17:56:04,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:56:04,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:56:04,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:56:04,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:56:04,460 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 14 states. [2020-10-14 17:56:04,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:56:04,861 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2020-10-14 17:56:04,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 17:56:04,863 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-10-14 17:56:04,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:56:04,864 INFO L225 Difference]: With dead ends: 59 [2020-10-14 17:56:04,864 INFO L226 Difference]: Without dead ends: 57 [2020-10-14 17:56:04,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:56:04,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-14 17:56:04,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 37. [2020-10-14 17:56:04,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 17:56:04,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-10-14 17:56:04,873 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 24 [2020-10-14 17:56:04,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:56:04,873 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-10-14 17:56:04,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:56:04,873 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-10-14 17:56:04,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 17:56:04,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:56:04,875 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:56:04,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 17:56:04,875 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:56:04,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:56:04,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1714798823, now seen corresponding path program 6 times [2020-10-14 17:56:04,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:56:04,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113168196] [2020-10-14 17:56:04,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:56:04,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:04,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:04,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:04,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:05,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:06,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:06,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 17:56:06,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:56:06,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1121 [2020-10-14 17:56:06,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:06,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:06,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:56:06,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:56:06,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 17:56:06,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:56:06,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:56:06,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:06,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:06,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:06,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:56:06,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:06,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:56:06,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:06,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:06,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:56:06,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:06,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:56:06,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:56:06,322 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 17:56:06,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113168196] [2020-10-14 17:56:06,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:56:06,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 17:56:06,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794168838] [2020-10-14 17:56:06,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 17:56:06,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:56:06,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 17:56:06,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:56:06,329 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 15 states. [2020-10-14 17:56:06,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:56:06,653 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2020-10-14 17:56:06,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 17:56:06,654 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2020-10-14 17:56:06,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:56:06,655 INFO L225 Difference]: With dead ends: 61 [2020-10-14 17:56:06,655 INFO L226 Difference]: Without dead ends: 59 [2020-10-14 17:56:06,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:56:06,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-14 17:56:06,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 38. [2020-10-14 17:56:06,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 17:56:06,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2020-10-14 17:56:06,669 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 25 [2020-10-14 17:56:06,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:56:06,670 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2020-10-14 17:56:06,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 17:56:06,670 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2020-10-14 17:56:06,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 17:56:06,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:56:06,672 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:56:06,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 17:56:06,673 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:56:06,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:56:06,673 INFO L82 PathProgramCache]: Analyzing trace with hash 584732673, now seen corresponding path program 7 times [2020-10-14 17:56:06,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:56:06,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559948952] [2020-10-14 17:56:06,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:56:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:06,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:06,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:06,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:07,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:07,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:07,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 17:56:07,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:56:07,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1289 [2020-10-14 17:56:07,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:07,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:07,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 17:56:07,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:56:07,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 17:56:07,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:56:08,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:56:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:08,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:08,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:08,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:56:08,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:08,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:56:08,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:08,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:08,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:56:08,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:08,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:56:08,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:56:08,311 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 17:56:08,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559948952] [2020-10-14 17:56:08,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:56:08,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:56:08,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101449133] [2020-10-14 17:56:08,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:56:08,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:56:08,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:56:08,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:56:08,314 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 16 states. [2020-10-14 17:56:08,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:56:08,640 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2020-10-14 17:56:08,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 17:56:08,641 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2020-10-14 17:56:08,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:56:08,643 INFO L225 Difference]: With dead ends: 63 [2020-10-14 17:56:08,643 INFO L226 Difference]: Without dead ends: 61 [2020-10-14 17:56:08,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:56:08,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-14 17:56:08,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 39. [2020-10-14 17:56:08,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 17:56:08,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2020-10-14 17:56:08,662 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 26 [2020-10-14 17:56:08,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:56:08,663 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2020-10-14 17:56:08,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:56:08,663 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2020-10-14 17:56:08,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 17:56:08,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:56:08,664 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:56:08,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 17:56:08,665 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:56:08,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:56:08,665 INFO L82 PathProgramCache]: Analyzing trace with hash 583556280, now seen corresponding path program 1 times [2020-10-14 17:56:08,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:56:08,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083271323] [2020-10-14 17:56:08,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:56:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:08,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:08,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:08,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:08,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:08,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:09,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:09,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 17:56:09,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:56:09,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 814 [2020-10-14 17:56:09,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:09,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:09,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:56:09,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:56:09,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 17:56:09,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:56:09,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:56:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:09,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:09,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:09,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:56:09,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:09,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:56:09,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:09,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:09,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:56:09,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:09,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:56:09,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:56:09,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-14 17:56:09,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:09,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:09,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:09,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:56:09,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:09,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 17:56:09,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:09,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:09,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:56:09,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 17:56:09,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:56:09,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:56:09,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:56:09,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083271323] [2020-10-14 17:56:09,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:56:09,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 17:56:09,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587811441] [2020-10-14 17:56:09,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 17:56:09,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:56:09,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 17:56:09,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:56:09,696 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 11 states. [2020-10-14 17:56:10,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:56:10,077 INFO L93 Difference]: Finished difference Result 69 states and 91 transitions. [2020-10-14 17:56:10,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 17:56:10,077 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-14 17:56:10,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:56:10,078 INFO L225 Difference]: With dead ends: 69 [2020-10-14 17:56:10,078 INFO L226 Difference]: Without dead ends: 53 [2020-10-14 17:56:10,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:56:10,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-14 17:56:10,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-14 17:56:10,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 17:56:10,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2020-10-14 17:56:10,087 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 28 [2020-10-14 17:56:10,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:56:10,087 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2020-10-14 17:56:10,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 17:56:10,088 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2020-10-14 17:56:10,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 17:56:10,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:56:10,089 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:56:10,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 17:56:10,089 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:56:10,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:56:10,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1144234983, now seen corresponding path program 8 times [2020-10-14 17:56:10,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:56:10,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357384983] [2020-10-14 17:56:10,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:56:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:10,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:10,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:10,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:11,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:11,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:11,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 17:56:11,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:56:11,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1696 [2020-10-14 17:56:11,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:11,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:11,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 17:56:11,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:56:11,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 17:56:11,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:56:12,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:56:12,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:12,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:12,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:12,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:56:12,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:12,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:56:12,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:12,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:12,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:56:12,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:12,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:56:12,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:56:12,103 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 17:56:12,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357384983] [2020-10-14 17:56:12,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:56:12,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 17:56:12,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188924979] [2020-10-14 17:56:12,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 17:56:12,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:56:12,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 17:56:12,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:56:12,107 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand 17 states. [2020-10-14 17:56:12,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:56:12,448 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2020-10-14 17:56:12,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 17:56:12,449 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 27 [2020-10-14 17:56:12,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:56:12,450 INFO L225 Difference]: With dead ends: 83 [2020-10-14 17:56:12,451 INFO L226 Difference]: Without dead ends: 78 [2020-10-14 17:56:12,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:56:12,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-14 17:56:12,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 55. [2020-10-14 17:56:12,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 17:56:12,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2020-10-14 17:56:12,476 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 27 [2020-10-14 17:56:12,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:56:12,478 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2020-10-14 17:56:12,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 17:56:12,479 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2020-10-14 17:56:12,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 17:56:12,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:56:12,483 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:56:12,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 17:56:12,487 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:56:12,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:56:12,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1092342529, now seen corresponding path program 9 times [2020-10-14 17:56:12,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:56:12,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920883218] [2020-10-14 17:56:12,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:56:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:12,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:12,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:12,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:13,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:14,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:14,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 17:56:14,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:56:14,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1606 [2020-10-14 17:56:14,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:14,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:14,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 17:56:14,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:56:14,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 17:56:14,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:56:14,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:56:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:14,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:14,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:14,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:56:14,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:14,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:56:14,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:14,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:14,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:56:14,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:14,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:56:14,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:56:14,638 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 17:56:14,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920883218] [2020-10-14 17:56:14,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:56:14,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 17:56:14,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059441038] [2020-10-14 17:56:14,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 17:56:14,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:56:14,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 17:56:14,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:56:14,642 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand 18 states. [2020-10-14 17:56:14,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:56:14,945 INFO L93 Difference]: Finished difference Result 86 states and 111 transitions. [2020-10-14 17:56:14,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 17:56:14,946 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 28 [2020-10-14 17:56:14,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:56:14,947 INFO L225 Difference]: With dead ends: 86 [2020-10-14 17:56:14,947 INFO L226 Difference]: Without dead ends: 81 [2020-10-14 17:56:14,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:56:14,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-14 17:56:14,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 57. [2020-10-14 17:56:14,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 17:56:14,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-10-14 17:56:14,965 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 28 [2020-10-14 17:56:14,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:56:14,965 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-10-14 17:56:14,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 17:56:14,965 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-10-14 17:56:14,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 17:56:14,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:56:14,966 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 17:56:14,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 17:56:14,967 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:56:14,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:56:14,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1901620111, now seen corresponding path program 2 times [2020-10-14 17:56:14,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:56:14,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757646750] [2020-10-14 17:56:14,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:56:14,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:14,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:14,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:14,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:15,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:15,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:15,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:15,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:16,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:16,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 17:56:16,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:56:16,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1325 [2020-10-14 17:56:16,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:16,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:16,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 17:56:16,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:56:16,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 17:56:16,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:56:16,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:56:16,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:16,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:16,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:16,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:56:16,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:16,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:56:16,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:16,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:16,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:56:16,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:16,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:56:16,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:56:16,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-14 17:56:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:16,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:16,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:16,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:56:16,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:16,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:56:16,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:16,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:16,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:56:16,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:16,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:56:16,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:56:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 17:56:16,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757646750] [2020-10-14 17:56:16,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:56:16,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:56:16,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180521435] [2020-10-14 17:56:16,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:56:16,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:56:16,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:56:16,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:56:16,484 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 12 states. [2020-10-14 17:56:16,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:56:16,659 INFO L93 Difference]: Finished difference Result 93 states and 121 transitions. [2020-10-14 17:56:16,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 17:56:16,660 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-14 17:56:16,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:56:16,661 INFO L225 Difference]: With dead ends: 93 [2020-10-14 17:56:16,661 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 17:56:16,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:56:16,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 17:56:16,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-14 17:56:16,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 17:56:16,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2020-10-14 17:56:16,671 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 29 [2020-10-14 17:56:16,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:56:16,672 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2020-10-14 17:56:16,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:56:16,672 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2020-10-14 17:56:16,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 17:56:16,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:56:16,673 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:56:16,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 17:56:16,673 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:56:16,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:56:16,674 INFO L82 PathProgramCache]: Analyzing trace with hash 902249105, now seen corresponding path program 3 times [2020-10-14 17:56:16,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:56:16,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674305512] [2020-10-14 17:56:16,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:56:16,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:16,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:16,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:16,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:16,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:16,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:17,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:18,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:18,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 17:56:18,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:56:18,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1756 [2020-10-14 17:56:18,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:18,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:18,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:56:18,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:56:18,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 17:56:18,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:56:18,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:56:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:18,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:18,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:18,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:56:18,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:18,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:56:18,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:18,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:18,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:56:18,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:18,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:56:18,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:56:18,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-14 17:56:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:18,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:18,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:18,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:56:18,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:18,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 17:56:18,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:18,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:18,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:56:18,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:18,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:56:18,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:56:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:56:18,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674305512] [2020-10-14 17:56:18,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:56:18,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 17:56:18,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706288665] [2020-10-14 17:56:18,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 17:56:18,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:56:18,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 17:56:18,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:56:18,630 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 13 states. [2020-10-14 17:56:18,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:56:18,947 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2020-10-14 17:56:18,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 17:56:18,948 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-14 17:56:18,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:56:18,949 INFO L225 Difference]: With dead ends: 67 [2020-10-14 17:56:18,949 INFO L226 Difference]: Without dead ends: 65 [2020-10-14 17:56:18,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:56:18,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-14 17:56:18,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 54. [2020-10-14 17:56:18,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 17:56:18,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2020-10-14 17:56:18,960 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 31 [2020-10-14 17:56:18,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:56:18,961 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2020-10-14 17:56:18,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 17:56:18,961 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2020-10-14 17:56:18,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 17:56:18,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:56:18,965 INFO L422 BasicCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:56:18,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 17:56:18,965 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:56:18,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:56:18,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1411035354, now seen corresponding path program 10 times [2020-10-14 17:56:18,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:56:18,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050563303] [2020-10-14 17:56:18,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:56:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:18,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:18,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:18,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:20,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:21,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:21,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 17:56:21,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:56:21,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2255 [2020-10-14 17:56:21,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:21,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:21,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 17:56:21,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:56:21,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 17:56:21,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:56:21,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:56:21,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:21,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:21,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:21,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:56:21,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:21,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:56:21,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:21,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:21,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:56:21,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:21,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:56:21,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:56:21,667 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:56:21,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050563303] [2020-10-14 17:56:21,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:56:21,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 17:56:21,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866768721] [2020-10-14 17:56:21,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 17:56:21,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:56:21,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 17:56:21,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:56:21,670 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand 20 states. [2020-10-14 17:56:22,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:56:22,051 INFO L93 Difference]: Finished difference Result 81 states and 104 transitions. [2020-10-14 17:56:22,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 17:56:22,053 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2020-10-14 17:56:22,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:56:22,054 INFO L225 Difference]: With dead ends: 81 [2020-10-14 17:56:22,054 INFO L226 Difference]: Without dead ends: 79 [2020-10-14 17:56:22,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2020-10-14 17:56:22,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-14 17:56:22,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 56. [2020-10-14 17:56:22,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-14 17:56:22,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2020-10-14 17:56:22,071 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 31 [2020-10-14 17:56:22,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:56:22,071 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2020-10-14 17:56:22,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 17:56:22,071 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2020-10-14 17:56:22,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 17:56:22,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:56:22,072 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:56:22,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 17:56:22,073 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:56:22,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:56:22,073 INFO L82 PathProgramCache]: Analyzing trace with hash 91482961, now seen corresponding path program 4 times [2020-10-14 17:56:22,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:56:22,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424592022] [2020-10-14 17:56:22,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:56:22,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:22,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:22,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:22,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:22,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:22,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:23,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:24,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:24,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 17:56:24,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:56:24,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2441 [2020-10-14 17:56:24,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:24,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:24,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:56:24,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:56:24,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 17:56:24,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:24,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:56:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:24,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:24,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:24,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:56:24,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:24,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:56:24,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:24,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:24,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:56:24,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:24,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:56:24,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:24,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-14 17:56:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:24,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:24,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:24,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:56:24,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:24,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:56:24,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:24,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:24,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:56:24,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:24,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:56:24,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:56:24,743 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:56:24,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424592022] [2020-10-14 17:56:24,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:56:24,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 17:56:24,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990930812] [2020-10-14 17:56:24,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 17:56:24,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:56:24,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 17:56:24,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:56:24,746 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand 15 states. [2020-10-14 17:56:25,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:56:25,092 INFO L93 Difference]: Finished difference Result 88 states and 107 transitions. [2020-10-14 17:56:25,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 17:56:25,092 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-10-14 17:56:25,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:56:25,094 INFO L225 Difference]: With dead ends: 88 [2020-10-14 17:56:25,094 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 17:56:25,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:56:25,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 17:56:25,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2020-10-14 17:56:25,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-14 17:56:25,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2020-10-14 17:56:25,117 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 33 [2020-10-14 17:56:25,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:56:25,117 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2020-10-14 17:56:25,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 17:56:25,117 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2020-10-14 17:56:25,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 17:56:25,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:56:25,118 INFO L422 BasicCegarLoop]: trace histogram [11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:56:25,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 17:56:25,119 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:56:25,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:56:25,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1298655648, now seen corresponding path program 11 times [2020-10-14 17:56:25,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:56:25,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289368809] [2020-10-14 17:56:25,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:56:25,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:25,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:25,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:25,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:26,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:27,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:27,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 17:56:27,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:56:27,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2404 [2020-10-14 17:56:27,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:27,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:27,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 17:56:27,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:56:27,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 17:56:27,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:56:28,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:56:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:28,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:28,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:28,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:56:28,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:28,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:56:28,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:28,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:28,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:56:28,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:28,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:56:28,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:56:28,208 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 68 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:56:28,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289368809] [2020-10-14 17:56:28,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:56:28,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 17:56:28,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958126576] [2020-10-14 17:56:28,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 17:56:28,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:56:28,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 17:56:28,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:56:28,211 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand 21 states. [2020-10-14 17:56:28,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:56:28,717 INFO L93 Difference]: Finished difference Result 90 states and 115 transitions. [2020-10-14 17:56:28,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 17:56:28,718 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 32 [2020-10-14 17:56:28,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:56:28,719 INFO L225 Difference]: With dead ends: 90 [2020-10-14 17:56:28,720 INFO L226 Difference]: Without dead ends: 88 [2020-10-14 17:56:28,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:56:28,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-14 17:56:28,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 57. [2020-10-14 17:56:28,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 17:56:28,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-10-14 17:56:28,731 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 32 [2020-10-14 17:56:28,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:56:28,732 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-10-14 17:56:28,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 17:56:28,732 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-10-14 17:56:28,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 17:56:28,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:56:28,733 INFO L422 BasicCegarLoop]: trace histogram [12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:56:28,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 17:56:28,734 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:56:28,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:56:28,734 INFO L82 PathProgramCache]: Analyzing trace with hash 600269210, now seen corresponding path program 12 times [2020-10-14 17:56:28,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:56:28,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529892371] [2020-10-14 17:56:28,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:56:28,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:28,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:28,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:28,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:30,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:31,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:31,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 17:56:31,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:56:31,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2502 [2020-10-14 17:56:31,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:31,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:31,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 17:56:31,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:56:31,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 17:56:31,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:31,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:56:31,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:31,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:31,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:31,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:56:31,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:31,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:56:31,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:31,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:31,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:56:31,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:31,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:56:31,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:31,831 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 1 proven. 80 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:56:31,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529892371] [2020-10-14 17:56:31,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:56:31,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 17:56:31,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177680896] [2020-10-14 17:56:31,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 17:56:31,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:56:31,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 17:56:31,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2020-10-14 17:56:31,834 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 22 states. [2020-10-14 17:56:32,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:56:32,276 INFO L93 Difference]: Finished difference Result 92 states and 119 transitions. [2020-10-14 17:56:32,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 17:56:32,277 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 33 [2020-10-14 17:56:32,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:56:32,278 INFO L225 Difference]: With dead ends: 92 [2020-10-14 17:56:32,278 INFO L226 Difference]: Without dead ends: 90 [2020-10-14 17:56:32,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2020-10-14 17:56:32,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-14 17:56:32,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-14 17:56:32,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 17:56:32,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2020-10-14 17:56:32,286 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 33 [2020-10-14 17:56:32,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:56:32,286 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2020-10-14 17:56:32,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 17:56:32,287 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2020-10-14 17:56:32,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 17:56:32,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:56:32,287 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:56:32,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 17:56:32,288 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:56:32,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:56:32,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1665700847, now seen corresponding path program 5 times [2020-10-14 17:56:32,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:56:32,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634550568] [2020-10-14 17:56:32,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:56:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:32,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:32,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:32,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:32,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:32,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:33,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:35,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:35,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 17:56:35,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:56:35,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2836 [2020-10-14 17:56:35,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:35,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:35,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 17:56:35,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:56:35,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 17:56:35,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:35,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:56:35,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:35,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:35,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:35,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:56:35,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:35,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:56:35,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:35,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:35,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:56:35,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:35,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:56:35,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:35,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-14 17:56:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:35,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:35,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:35,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:56:35,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:35,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:56:35,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:35,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:35,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:56:35,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:35,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:56:35,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:35,436 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:56:35,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634550568] [2020-10-14 17:56:35,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:56:35,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 17:56:35,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815802155] [2020-10-14 17:56:35,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 17:56:35,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:56:35,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 17:56:35,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:56:35,439 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand 17 states. [2020-10-14 17:56:35,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:56:35,870 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2020-10-14 17:56:35,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 17:56:35,873 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-10-14 17:56:35,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:56:35,875 INFO L225 Difference]: With dead ends: 92 [2020-10-14 17:56:35,875 INFO L226 Difference]: Without dead ends: 90 [2020-10-14 17:56:35,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2020-10-14 17:56:35,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-14 17:56:35,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-14 17:56:35,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 17:56:35,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2020-10-14 17:56:35,887 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 35 [2020-10-14 17:56:35,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:56:35,888 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2020-10-14 17:56:35,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 17:56:35,888 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2020-10-14 17:56:35,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 17:56:35,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:56:35,888 INFO L422 BasicCegarLoop]: trace histogram [13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:56:35,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 17:56:35,889 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:56:35,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:56:35,889 INFO L82 PathProgramCache]: Analyzing trace with hash -662602336, now seen corresponding path program 13 times [2020-10-14 17:56:35,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:56:35,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366750417] [2020-10-14 17:56:35,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:56:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:35,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:35,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:35,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:37,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:38,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:38,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 17:56:38,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:56:38,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2238 [2020-10-14 17:56:38,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:38,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:38,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 17:56:38,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:56:38,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 17:56:38,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:38,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:56:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:38,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:38,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:38,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:56:38,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:38,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:56:38,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:38,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:38,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:56:38,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:38,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:56:38,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:38,882 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 1 proven. 93 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:56:38,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366750417] [2020-10-14 17:56:38,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:56:38,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 17:56:38,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289941983] [2020-10-14 17:56:38,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 17:56:38,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:56:38,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 17:56:38,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:56:38,884 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand 23 states. [2020-10-14 17:56:39,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:56:39,301 INFO L93 Difference]: Finished difference Result 94 states and 123 transitions. [2020-10-14 17:56:39,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 17:56:39,302 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 34 [2020-10-14 17:56:39,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:56:39,303 INFO L225 Difference]: With dead ends: 94 [2020-10-14 17:56:39,303 INFO L226 Difference]: Without dead ends: 92 [2020-10-14 17:56:39,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=228, Invalid=528, Unknown=0, NotChecked=0, Total=756 [2020-10-14 17:56:39,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-14 17:56:39,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 59. [2020-10-14 17:56:39,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 17:56:39,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2020-10-14 17:56:39,311 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 34 [2020-10-14 17:56:39,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:56:39,311 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2020-10-14 17:56:39,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 17:56:39,312 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2020-10-14 17:56:39,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 17:56:39,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:56:39,312 INFO L422 BasicCegarLoop]: trace histogram [14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:56:39,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 17:56:39,313 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:56:39,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:56:39,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1156914598, now seen corresponding path program 14 times [2020-10-14 17:56:39,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:56:39,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633994361] [2020-10-14 17:56:39,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:56:39,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:39,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:39,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:39,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:40,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:41,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:41,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 17:56:41,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:56:41,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2025 [2020-10-14 17:56:41,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:41,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:41,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 17:56:41,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:56:41,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 17:56:41,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:42,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:56:42,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:42,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:42,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:42,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:56:42,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:42,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:56:42,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:42,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:42,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:56:42,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:42,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:56:42,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:42,037 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 1 proven. 107 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:56:42,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633994361] [2020-10-14 17:56:42,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:56:42,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 17:56:42,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459481287] [2020-10-14 17:56:42,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 17:56:42,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:56:42,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 17:56:42,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-14 17:56:42,039 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand 24 states. [2020-10-14 17:56:42,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:56:42,437 INFO L93 Difference]: Finished difference Result 96 states and 127 transitions. [2020-10-14 17:56:42,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 17:56:42,438 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 35 [2020-10-14 17:56:42,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:56:42,439 INFO L225 Difference]: With dead ends: 96 [2020-10-14 17:56:42,439 INFO L226 Difference]: Without dead ends: 94 [2020-10-14 17:56:42,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=254, Invalid=616, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:56:42,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-14 17:56:42,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 60. [2020-10-14 17:56:42,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-14 17:56:42,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2020-10-14 17:56:42,449 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 35 [2020-10-14 17:56:42,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:56:42,449 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2020-10-14 17:56:42,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 17:56:42,449 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2020-10-14 17:56:42,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 17:56:42,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:56:42,450 INFO L422 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:56:42,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 17:56:42,451 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:56:42,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:56:42,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1897774289, now seen corresponding path program 6 times [2020-10-14 17:56:42,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:56:42,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781715911] [2020-10-14 17:56:42,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:56:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:42,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:42,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:42,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:42,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:43,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:43,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:44,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:44,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 17:56:44,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:56:44,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1970 [2020-10-14 17:56:44,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:44,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:44,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 17:56:44,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:56:44,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 17:56:44,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:44,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:56:44,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:44,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:44,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:44,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:56:44,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:44,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:56:44,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:44,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:44,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:56:44,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:44,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:56:44,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:44,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-14 17:56:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:44,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:44,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:44,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:56:44,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:44,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:56:44,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:44,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:44,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:56:44,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:44,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:56:44,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:44,832 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:56:44,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781715911] [2020-10-14 17:56:44,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:56:44,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 17:56:44,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202162668] [2020-10-14 17:56:44,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 17:56:44,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:56:44,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 17:56:44,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:56:44,834 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand 19 states. [2020-10-14 17:56:45,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:56:45,327 INFO L93 Difference]: Finished difference Result 93 states and 119 transitions. [2020-10-14 17:56:45,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 17:56:45,328 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2020-10-14 17:56:45,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:56:45,329 INFO L225 Difference]: With dead ends: 93 [2020-10-14 17:56:45,329 INFO L226 Difference]: Without dead ends: 91 [2020-10-14 17:56:45,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:56:45,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-14 17:56:45,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 57. [2020-10-14 17:56:45,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 17:56:45,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2020-10-14 17:56:45,342 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 37 [2020-10-14 17:56:45,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:56:45,342 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2020-10-14 17:56:45,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 17:56:45,342 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2020-10-14 17:56:45,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 17:56:45,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:56:45,343 INFO L422 BasicCegarLoop]: trace histogram [15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:56:45,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 17:56:45,343 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:56:45,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:56:45,344 INFO L82 PathProgramCache]: Analyzing trace with hash 699274464, now seen corresponding path program 15 times [2020-10-14 17:56:45,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:56:45,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277904291] [2020-10-14 17:56:45,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:56:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:45,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:45,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:45,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:46,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:47,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:47,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 17:56:47,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:56:47,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1836 [2020-10-14 17:56:47,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:47,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:47,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 17:56:47,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:56:47,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 17:56:47,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:47,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:56:47,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:47,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:47,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:47,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:56:47,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:47,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:56:47,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:47,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:47,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:56:47,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:47,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:56:47,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:56:47,997 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 1 proven. 122 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:56:47,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277904291] [2020-10-14 17:56:47,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:56:47,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 17:56:47,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128696432] [2020-10-14 17:56:47,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 17:56:47,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:56:47,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 17:56:47,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-14 17:56:47,999 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand 25 states. [2020-10-14 17:56:48,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:56:48,497 INFO L93 Difference]: Finished difference Result 95 states and 127 transitions. [2020-10-14 17:56:48,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 17:56:48,500 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 36 [2020-10-14 17:56:48,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:56:48,501 INFO L225 Difference]: With dead ends: 95 [2020-10-14 17:56:48,502 INFO L226 Difference]: Without dead ends: 93 [2020-10-14 17:56:48,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-10-14 17:56:48,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-14 17:56:48,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-10-14 17:56:48,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 17:56:48,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2020-10-14 17:56:48,510 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 36 [2020-10-14 17:56:48,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:56:48,510 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2020-10-14 17:56:48,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 17:56:48,510 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2020-10-14 17:56:48,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 17:56:48,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:56:48,511 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:56:48,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 17:56:48,511 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:56:48,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:56:48,511 INFO L82 PathProgramCache]: Analyzing trace with hash -684605368, now seen corresponding path program 7 times [2020-10-14 17:56:48,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:56:48,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552108466] [2020-10-14 17:56:48,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:56:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:48,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:48,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:48,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:48,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:48,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:49,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:49,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:51,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:51,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 17:56:51,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:56:51,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3201 [2020-10-14 17:56:51,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:51,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:51,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:56:51,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:56:51,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 17:56:51,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:51,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:56:51,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:51,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:51,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:51,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:56:51,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:51,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:56:51,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:51,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:51,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:56:51,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:51,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:56:51,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:56:51,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-14 17:56:51,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:51,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:51,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:51,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:56:51,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:51,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:56:51,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:51,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:51,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:56:51,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:51,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:56:51,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:51,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-14 17:56:51,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:51,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:51,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:51,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:56:51,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:51,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:56:51,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:51,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:51,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:56:51,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 17:56:51,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:56:51,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:51,916 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 17:56:51,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552108466] [2020-10-14 17:56:51,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:56:51,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:56:51,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158861856] [2020-10-14 17:56:51,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:56:51,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:56:51,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:56:51,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:56:51,919 INFO L87 Difference]: Start difference. First operand 58 states and 75 transitions. Second operand 14 states. [2020-10-14 17:56:52,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:56:52,384 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2020-10-14 17:56:52,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 17:56:52,385 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-14 17:56:52,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:56:52,386 INFO L225 Difference]: With dead ends: 84 [2020-10-14 17:56:52,386 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 17:56:52,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:56:52,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 17:56:52,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2020-10-14 17:56:52,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 17:56:52,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-10-14 17:56:52,395 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 39 [2020-10-14 17:56:52,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:56:52,395 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-10-14 17:56:52,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:56:52,395 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-10-14 17:56:52,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 17:56:52,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:56:52,396 INFO L422 BasicCegarLoop]: trace histogram [16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:56:52,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 17:56:52,396 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:56:52,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:56:52,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1888406758, now seen corresponding path program 16 times [2020-10-14 17:56:52,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:56:52,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712182216] [2020-10-14 17:56:52,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:56:52,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:52,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:52,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:52,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:53,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:54,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:54,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 17:56:54,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:56:54,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1968 [2020-10-14 17:56:54,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:54,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:54,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 17:56:54,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:56:54,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 17:56:54,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:55,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:56:55,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:55,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:55,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:55,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:56:55,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:55,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:56:55,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:55,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:55,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:56:55,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:55,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:56:55,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:55,254 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 1 proven. 138 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:56:55,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712182216] [2020-10-14 17:56:55,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:56:55,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 17:56:55,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870241280] [2020-10-14 17:56:55,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 17:56:55,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:56:55,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 17:56:55,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:56:55,257 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 26 states. [2020-10-14 17:56:55,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:56:55,756 INFO L93 Difference]: Finished difference Result 82 states and 107 transitions. [2020-10-14 17:56:55,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 17:56:55,757 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 37 [2020-10-14 17:56:55,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:56:55,758 INFO L225 Difference]: With dead ends: 82 [2020-10-14 17:56:55,758 INFO L226 Difference]: Without dead ends: 80 [2020-10-14 17:56:55,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=299, Invalid=693, Unknown=0, NotChecked=0, Total=992 [2020-10-14 17:56:55,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-14 17:56:55,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2020-10-14 17:56:55,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-14 17:56:55,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-10-14 17:56:55,766 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 37 [2020-10-14 17:56:55,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:56:55,766 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-10-14 17:56:55,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 17:56:55,766 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-10-14 17:56:55,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 17:56:55,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:56:55,766 INFO L422 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:56:55,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 17:56:55,767 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:56:55,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:56:55,767 INFO L82 PathProgramCache]: Analyzing trace with hash -986522223, now seen corresponding path program 8 times [2020-10-14 17:56:55,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:56:55,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944280988] [2020-10-14 17:56:55,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:56:55,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:55,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:55,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:55,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:55,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:56,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:57,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:58,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:58,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 17:56:58,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:56:58,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3098 [2020-10-14 17:56:58,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:58,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:58,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 17:56:58,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:56:58,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 17:56:58,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:59,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:56:59,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:59,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:59,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:59,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:56:59,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:59,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:56:59,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:59,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:59,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:56:59,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:59,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:56:59,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:59,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-14 17:56:59,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:59,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:59,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:59,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:56:59,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:59,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:56:59,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:59,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:59,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:56:59,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:59,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:56:59,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 2 proven. 60 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:56:59,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944280988] [2020-10-14 17:56:59,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:56:59,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 17:56:59,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184749682] [2020-10-14 17:56:59,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 17:56:59,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:56:59,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 17:56:59,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:56:59,354 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 21 states. [2020-10-14 17:56:59,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:56:59,868 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2020-10-14 17:56:59,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 17:56:59,871 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2020-10-14 17:56:59,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:56:59,872 INFO L225 Difference]: With dead ends: 78 [2020-10-14 17:56:59,873 INFO L226 Difference]: Without dead ends: 65 [2020-10-14 17:56:59,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:56:59,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-14 17:56:59,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 52. [2020-10-14 17:56:59,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-14 17:56:59,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-10-14 17:56:59,881 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 39 [2020-10-14 17:56:59,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:56:59,882 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-10-14 17:56:59,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 17:56:59,882 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-10-14 17:56:59,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 17:56:59,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:56:59,882 INFO L422 BasicCegarLoop]: trace histogram [17, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:56:59,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 17:56:59,883 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:56:59,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:56:59,883 INFO L82 PathProgramCache]: Analyzing trace with hash -502146016, now seen corresponding path program 17 times [2020-10-14 17:56:59,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:56:59,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491066377] [2020-10-14 17:56:59,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:56:59,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:59,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:59,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:59,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:01,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:02,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:57:02,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 17:57:02,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:57:02,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2313 [2020-10-14 17:57:02,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:57:02,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:57:02,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 17:57:02,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:57:02,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 17:57:02,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:57:03,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:57:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:57:03,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:03,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:57:03,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:57:03,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:57:03,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:57:03,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:57:03,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:57:03,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:57:03,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:57:03,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:57:03,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:57:03,191 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 1 proven. 155 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:57:03,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491066377] [2020-10-14 17:57:03,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:57:03,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 17:57:03,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035652548] [2020-10-14 17:57:03,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 17:57:03,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:57:03,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 17:57:03,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2020-10-14 17:57:03,193 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 27 states. [2020-10-14 17:57:03,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:57:03,746 INFO L93 Difference]: Finished difference Result 84 states and 109 transitions. [2020-10-14 17:57:03,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 17:57:03,747 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 38 [2020-10-14 17:57:03,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:57:03,749 INFO L225 Difference]: With dead ends: 84 [2020-10-14 17:57:03,749 INFO L226 Difference]: Without dead ends: 82 [2020-10-14 17:57:03,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=323, Invalid=733, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:57:03,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-14 17:57:03,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 53. [2020-10-14 17:57:03,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 17:57:03,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2020-10-14 17:57:03,757 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 38 [2020-10-14 17:57:03,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:57:03,757 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2020-10-14 17:57:03,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 17:57:03,757 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2020-10-14 17:57:03,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 17:57:03,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:57:03,758 INFO L422 BasicCegarLoop]: trace histogram [18, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:57:03,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 17:57:03,758 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:57:03,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:57:03,758 INFO L82 PathProgramCache]: Analyzing trace with hash -477735974, now seen corresponding path program 18 times [2020-10-14 17:57:03,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:57:03,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104470605] [2020-10-14 17:57:03,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:57:03,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:57:03,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:03,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:03,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:05,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:06,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:57:06,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 17:57:06,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:57:06,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2488 [2020-10-14 17:57:06,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:57:06,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:57:06,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 17:57:06,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:57:06,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 17:57:06,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:57:07,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:57:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:57:07,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:07,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:57:07,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:57:07,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:57:07,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:57:07,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:57:07,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:57:07,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:57:07,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:57:07,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:57:07,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:57:07,370 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 1 proven. 173 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:57:07,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104470605] [2020-10-14 17:57:07,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:57:07,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 17:57:07,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623470431] [2020-10-14 17:57:07,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 17:57:07,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:57:07,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 17:57:07,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=494, Unknown=0, NotChecked=0, Total=756 [2020-10-14 17:57:07,372 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 28 states. [2020-10-14 17:57:07,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:57:07,967 INFO L93 Difference]: Finished difference Result 86 states and 113 transitions. [2020-10-14 17:57:07,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 17:57:07,968 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 39 [2020-10-14 17:57:07,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:57:07,969 INFO L225 Difference]: With dead ends: 86 [2020-10-14 17:57:07,970 INFO L226 Difference]: Without dead ends: 84 [2020-10-14 17:57:07,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=348, Invalid=774, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 17:57:07,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-14 17:57:07,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 54. [2020-10-14 17:57:07,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 17:57:07,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-10-14 17:57:07,987 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 39 [2020-10-14 17:57:07,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:57:07,987 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-10-14 17:57:07,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 17:57:07,988 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-10-14 17:57:07,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 17:57:07,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:57:07,988 INFO L422 BasicCegarLoop]: trace histogram [12, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:57:07,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 17:57:07,989 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:57:07,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:57:07,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1753402961, now seen corresponding path program 9 times [2020-10-14 17:57:07,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:57:07,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875754536] [2020-10-14 17:57:07,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:57:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:57:07,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:08,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:08,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:08,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:08,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:09,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:11,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:57:11,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 17:57:11,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:57:11,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3045 [2020-10-14 17:57:11,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:57:11,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:57:11,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 17:57:11,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:57:11,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 17:57:11,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:57:11,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:57:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:57:11,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:11,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:57:11,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:57:11,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:57:11,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:57:11,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:57:11,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:57:11,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:57:11,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:57:11,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:57:11,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:57:11,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-14 17:57:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:57:11,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:11,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:57:11,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:57:11,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:57:11,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:57:11,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:57:11,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:57:11,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:57:11,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:57:11,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:57:11,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:57:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:57:11,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875754536] [2020-10-14 17:57:11,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:57:11,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 17:57:11,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444191186] [2020-10-14 17:57:11,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 17:57:11,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:57:11,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 17:57:11,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:57:11,914 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 23 states. [2020-10-14 17:57:12,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:57:12,438 INFO L93 Difference]: Finished difference Result 82 states and 104 transitions. [2020-10-14 17:57:12,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 17:57:12,439 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 41 [2020-10-14 17:57:12,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:57:12,440 INFO L225 Difference]: With dead ends: 82 [2020-10-14 17:57:12,441 INFO L226 Difference]: Without dead ends: 69 [2020-10-14 17:57:12,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=237, Invalid=633, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:57:12,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-14 17:57:12,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 54. [2020-10-14 17:57:12,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 17:57:12,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2020-10-14 17:57:12,449 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 41 [2020-10-14 17:57:12,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:57:12,449 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2020-10-14 17:57:12,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 17:57:12,449 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2020-10-14 17:57:12,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 17:57:12,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:57:12,450 INFO L422 BasicCegarLoop]: trace histogram [19, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:57:12,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 17:57:12,450 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:57:12,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:57:12,450 INFO L82 PathProgramCache]: Analyzing trace with hash 278975328, now seen corresponding path program 19 times [2020-10-14 17:57:12,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:57:12,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550595145] [2020-10-14 17:57:12,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:57:12,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:57:12,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:12,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:12,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:14,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:15,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:57:15,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 17:57:15,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:57:15,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2625 [2020-10-14 17:57:15,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:57:15,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:57:15,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 17:57:15,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:57:15,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 17:57:15,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:57:16,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:57:16,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:57:16,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:16,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:57:16,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:57:16,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:57:16,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:57:16,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:57:16,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:57:16,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:57:16,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:57:16,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:57:16,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:57:16,320 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 1 proven. 192 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:57:16,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550595145] [2020-10-14 17:57:16,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:57:16,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 17:57:16,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098199582] [2020-10-14 17:57:16,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 17:57:16,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:57:16,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 17:57:16,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=527, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:57:16,322 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 29 states. [2020-10-14 17:57:16,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:57:16,882 INFO L93 Difference]: Finished difference Result 88 states and 115 transitions. [2020-10-14 17:57:16,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 17:57:16,883 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 40 [2020-10-14 17:57:16,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:57:16,884 INFO L225 Difference]: With dead ends: 88 [2020-10-14 17:57:16,885 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 17:57:16,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 17:57:16,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 17:57:16,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 55. [2020-10-14 17:57:16,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 17:57:16,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-10-14 17:57:16,895 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 40 [2020-10-14 17:57:16,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:57:16,895 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-10-14 17:57:16,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 17:57:16,896 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-10-14 17:57:16,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 17:57:16,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:57:16,896 INFO L422 BasicCegarLoop]: trace histogram [20, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:57:16,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 17:57:16,897 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:57:16,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:57:16,897 INFO L82 PathProgramCache]: Analyzing trace with hash -2032778086, now seen corresponding path program 20 times [2020-10-14 17:57:16,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:57:16,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026908979] [2020-10-14 17:57:16,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:57:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:57:16,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:16,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:16,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:18,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:19,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:57:19,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 17:57:19,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:57:19,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2834 [2020-10-14 17:57:19,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:57:19,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:57:19,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 17:57:19,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:57:19,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 17:57:19,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:57:21,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:57:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:57:21,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:21,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:57:21,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:57:21,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:57:21,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:57:21,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:57:21,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:57:21,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:57:21,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:57:21,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:57:21,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:57:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 1 proven. 212 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:57:21,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026908979] [2020-10-14 17:57:21,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:57:21,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 17:57:21,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978960651] [2020-10-14 17:57:21,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 17:57:21,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:57:21,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 17:57:21,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=561, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:57:21,285 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 30 states. [2020-10-14 17:57:21,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:57:21,795 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2020-10-14 17:57:21,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 17:57:21,797 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 41 [2020-10-14 17:57:21,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:57:21,798 INFO L225 Difference]: With dead ends: 90 [2020-10-14 17:57:21,798 INFO L226 Difference]: Without dead ends: 88 [2020-10-14 17:57:21,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=401, Invalid=859, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 17:57:21,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-14 17:57:21,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 56. [2020-10-14 17:57:21,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-14 17:57:21,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-10-14 17:57:21,808 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 41 [2020-10-14 17:57:21,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:57:21,808 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-10-14 17:57:21,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 17:57:21,808 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-10-14 17:57:21,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 17:57:21,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:57:21,809 INFO L422 BasicCegarLoop]: trace histogram [14, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:57:21,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 17:57:21,809 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:57:21,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:57:21,810 INFO L82 PathProgramCache]: Analyzing trace with hash 2006552337, now seen corresponding path program 10 times [2020-10-14 17:57:21,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:57:21,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039273381] [2020-10-14 17:57:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:57:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:57:21,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:21,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:21,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:21,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:22,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:23,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:24,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:57:24,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 17:57:24,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:57:24,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3018 [2020-10-14 17:57:24,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:57:24,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:57:24,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 17:57:24,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:57:24,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 17:57:24,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:57:25,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:57:25,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:57:25,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:25,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:57:25,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:57:25,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:57:25,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:57:25,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:57:25,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:57:25,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:57:25,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:57:25,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:57:25,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:57:25,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-14 17:57:25,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:57:25,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:25,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:57:25,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:57:25,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:57:25,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:57:25,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:57:25,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:57:25,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:57:25,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:57:25,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:57:25,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:57:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 2 proven. 110 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:57:25,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039273381] [2020-10-14 17:57:25,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:57:25,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 17:57:25,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633645763] [2020-10-14 17:57:25,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 17:57:25,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:57:25,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 17:57:25,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2020-10-14 17:57:25,491 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 25 states. [2020-10-14 17:57:26,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:57:26,077 INFO L93 Difference]: Finished difference Result 86 states and 110 transitions. [2020-10-14 17:57:26,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 17:57:26,078 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 43 [2020-10-14 17:57:26,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:57:26,079 INFO L225 Difference]: With dead ends: 86 [2020-10-14 17:57:26,079 INFO L226 Difference]: Without dead ends: 73 [2020-10-14 17:57:26,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=282, Invalid=710, Unknown=0, NotChecked=0, Total=992 [2020-10-14 17:57:26,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-14 17:57:26,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 56. [2020-10-14 17:57:26,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-14 17:57:26,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2020-10-14 17:57:26,089 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 43 [2020-10-14 17:57:26,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:57:26,090 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2020-10-14 17:57:26,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 17:57:26,090 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2020-10-14 17:57:26,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 17:57:26,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:57:26,091 INFO L422 BasicCegarLoop]: trace histogram [21, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:57:26,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 17:57:26,091 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:57:26,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:57:26,091 INFO L82 PathProgramCache]: Analyzing trace with hash -682689888, now seen corresponding path program 21 times [2020-10-14 17:57:26,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:57:26,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045158616] [2020-10-14 17:57:26,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:57:26,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:57:26,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:26,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:26,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:27,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:28,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:57:28,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 17:57:28,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:57:28,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2886 [2020-10-14 17:57:28,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:57:28,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:57:28,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 17:57:28,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:57:28,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 17:57:28,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:57:30,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:57:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:57:30,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:30,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:57:30,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:57:30,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:57:30,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:57:30,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:57:30,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:57:30,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:57:30,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:57:30,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:57:30,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:57:30,403 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 1 proven. 233 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:57:30,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045158616] [2020-10-14 17:57:30,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:57:30,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 17:57:30,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032507384] [2020-10-14 17:57:30,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 17:57:30,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:57:30,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 17:57:30,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=596, Unknown=0, NotChecked=0, Total=930 [2020-10-14 17:57:30,405 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 31 states. [2020-10-14 17:57:30,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:57:30,977 INFO L93 Difference]: Finished difference Result 92 states and 121 transitions. [2020-10-14 17:57:30,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 17:57:30,978 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 42 [2020-10-14 17:57:30,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:57:30,979 INFO L225 Difference]: With dead ends: 92 [2020-10-14 17:57:30,979 INFO L226 Difference]: Without dead ends: 90 [2020-10-14 17:57:30,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=424, Invalid=836, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 17:57:30,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-14 17:57:30,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 57. [2020-10-14 17:57:30,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 17:57:30,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2020-10-14 17:57:30,988 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 42 [2020-10-14 17:57:30,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:57:30,988 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2020-10-14 17:57:30,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 17:57:30,989 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2020-10-14 17:57:30,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 17:57:30,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:57:30,989 INFO L422 BasicCegarLoop]: trace histogram [22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:57:30,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 17:57:30,989 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:57:30,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:57:30,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1779628710, now seen corresponding path program 22 times [2020-10-14 17:57:30,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:57:30,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780393008] [2020-10-14 17:57:30,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:57:30,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:57:30,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:31,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:31,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:32,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:33,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:57:33,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 17:57:33,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:57:33,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2904 [2020-10-14 17:57:33,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:57:33,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:57:33,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 17:57:33,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:57:33,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 17:57:33,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:57:35,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:57:35,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:57:35,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:35,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:57:35,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:57:35,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:57:35,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:57:35,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:57:35,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:57:35,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:57:35,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:57:35,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:57:35,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:57:35,434 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 1 proven. 255 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:57:35,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780393008] [2020-10-14 17:57:35,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:57:35,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 17:57:35,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925118797] [2020-10-14 17:57:35,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 17:57:35,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:57:35,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 17:57:35,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=632, Unknown=0, NotChecked=0, Total=992 [2020-10-14 17:57:35,437 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 32 states. [2020-10-14 17:57:36,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:57:36,128 INFO L93 Difference]: Finished difference Result 94 states and 125 transitions. [2020-10-14 17:57:36,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 17:57:36,129 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 43 [2020-10-14 17:57:36,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:57:36,131 INFO L225 Difference]: With dead ends: 94 [2020-10-14 17:57:36,131 INFO L226 Difference]: Without dead ends: 92 [2020-10-14 17:57:36,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=453, Invalid=879, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 17:57:36,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-14 17:57:36,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 58. [2020-10-14 17:57:36,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 17:57:36,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2020-10-14 17:57:36,152 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 43 [2020-10-14 17:57:36,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:57:36,155 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2020-10-14 17:57:36,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 17:57:36,156 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2020-10-14 17:57:36,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 17:57:36,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:57:36,157 INFO L422 BasicCegarLoop]: trace histogram [16, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:57:36,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 17:57:36,157 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:57:36,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:57:36,157 INFO L82 PathProgramCache]: Analyzing trace with hash 469966801, now seen corresponding path program 11 times [2020-10-14 17:57:36,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:57:36,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090046736] [2020-10-14 17:57:36,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:57:36,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:57:36,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:36,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:36,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:36,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:37,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:39,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:40,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:57:40,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 17:57:40,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:57:40,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4640 [2020-10-14 17:57:40,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:57:40,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:57:40,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 17:57:40,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:57:40,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 17:57:40,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:57:41,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:57:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:57:41,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:41,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:57:41,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:57:41,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:57:41,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:57:41,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:57:41,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:57:41,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:57:41,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:57:41,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:57:41,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:57:41,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-14 17:57:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:57:41,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:41,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:57:41,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:57:41,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:57:41,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:57:41,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:57:41,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:57:41,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:57:41,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:57:41,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:57:41,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:57:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 2 proven. 141 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:57:41,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090046736] [2020-10-14 17:57:41,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:57:41,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 17:57:41,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886927623] [2020-10-14 17:57:41,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 17:57:41,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:57:41,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 17:57:41,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=483, Unknown=0, NotChecked=0, Total=702 [2020-10-14 17:57:41,799 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 27 states. [2020-10-14 17:57:42,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:57:42,469 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2020-10-14 17:57:42,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 17:57:42,469 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 45 [2020-10-14 17:57:42,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:57:42,471 INFO L225 Difference]: With dead ends: 90 [2020-10-14 17:57:42,471 INFO L226 Difference]: Without dead ends: 77 [2020-10-14 17:57:42,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=336, Invalid=854, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 17:57:42,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-14 17:57:42,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 58. [2020-10-14 17:57:42,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 17:57:42,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-10-14 17:57:42,483 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 45 [2020-10-14 17:57:42,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:57:42,483 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-10-14 17:57:42,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 17:57:42,483 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-10-14 17:57:42,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 17:57:42,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:57:42,484 INFO L422 BasicCegarLoop]: trace histogram [23, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:57:42,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 17:57:42,484 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:57:42,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:57:42,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1424993824, now seen corresponding path program 23 times [2020-10-14 17:57:42,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:57:42,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233548999] [2020-10-14 17:57:42,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:57:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:57:42,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:42,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:42,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:44,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:45,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:57:45,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 17:57:45,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:57:45,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3092 [2020-10-14 17:57:45,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:57:45,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:57:45,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 17:57:45,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:57:45,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 17:57:45,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:57:47,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:57:47,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:57:47,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:47,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:57:47,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:57:47,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:57:47,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:57:47,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:57:47,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:57:47,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:57:47,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:57:47,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:57:47,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:57:47,286 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 1 proven. 278 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:57:47,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233548999] [2020-10-14 17:57:47,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:57:47,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 17:57:47,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972691339] [2020-10-14 17:57:47,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 17:57:47,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:57:47,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 17:57:47,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=669, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:57:47,289 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 33 states. [2020-10-14 17:57:47,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:57:47,961 INFO L93 Difference]: Finished difference Result 96 states and 127 transitions. [2020-10-14 17:57:47,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 17:57:47,962 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 44 [2020-10-14 17:57:47,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:57:47,964 INFO L225 Difference]: With dead ends: 96 [2020-10-14 17:57:47,964 INFO L226 Difference]: Without dead ends: 94 [2020-10-14 17:57:47,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=483, Invalid=923, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 17:57:47,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-14 17:57:47,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 59. [2020-10-14 17:57:47,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 17:57:47,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-10-14 17:57:47,974 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 44 [2020-10-14 17:57:47,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:57:47,974 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-10-14 17:57:47,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 17:57:47,974 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-10-14 17:57:47,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 17:57:47,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:57:47,975 INFO L422 BasicCegarLoop]: trace histogram [24, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:57:47,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 17:57:47,975 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:57:47,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:57:47,976 INFO L82 PathProgramCache]: Analyzing trace with hash 978753050, now seen corresponding path program 24 times [2020-10-14 17:57:47,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:57:47,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179295127] [2020-10-14 17:57:47,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:57:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:57:47,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:47,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:48,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:50,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:51,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:57:51,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 17:57:51,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:57:51,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3144 [2020-10-14 17:57:51,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:57:51,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:57:51,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 17:57:51,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:57:51,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 17:57:51,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:57:52,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:57:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:57:52,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:52,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:57:52,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:57:52,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:57:52,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:57:52,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:57:52,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:57:52,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:57:52,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:57:52,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:57:52,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:57:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 1 proven. 302 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:57:52,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179295127] [2020-10-14 17:57:52,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:57:52,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 17:57:52,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849677746] [2020-10-14 17:57:52,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 17:57:52,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:57:52,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 17:57:52,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=707, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 17:57:52,969 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 34 states. [2020-10-14 17:57:53,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:57:53,685 INFO L93 Difference]: Finished difference Result 98 states and 131 transitions. [2020-10-14 17:57:53,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 17:57:53,686 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 45 [2020-10-14 17:57:53,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:57:53,687 INFO L225 Difference]: With dead ends: 98 [2020-10-14 17:57:53,687 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 17:57:53,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=514, Invalid=968, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 17:57:53,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 17:57:53,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 60. [2020-10-14 17:57:53,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-14 17:57:53,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2020-10-14 17:57:53,698 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 45 [2020-10-14 17:57:53,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:57:53,698 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2020-10-14 17:57:53,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 17:57:53,699 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2020-10-14 17:57:53,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 17:57:53,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:57:53,699 INFO L422 BasicCegarLoop]: trace histogram [18, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:57:53,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 17:57:53,700 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:57:53,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:57:53,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1280016529, now seen corresponding path program 12 times [2020-10-14 17:57:53,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:57:53,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022614569] [2020-10-14 17:57:53,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:57:53,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:57:53,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:53,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:53,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:53,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:54,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:56,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:58,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:57:58,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 17:57:58,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:57:58,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4435 [2020-10-14 17:57:58,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:57:58,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:57:58,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 17:57:58,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:57:58,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 17:57:58,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:57:59,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:57:59,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:57:59,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:59,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:57:59,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:57:59,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:57:59,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:57:59,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:57:59,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:57:59,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:57:59,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:57:59,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:57:59,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:57:59,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-14 17:57:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:57:59,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:57:59,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:57:59,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:57:59,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:57:59,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:57:59,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:57:59,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:57:59,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:57:59,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:57:59,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:57:59,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:57:59,397 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 2 proven. 176 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:57:59,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022614569] [2020-10-14 17:57:59,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:57:59,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 17:57:59,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601540073] [2020-10-14 17:57:59,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 17:57:59,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:57:59,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 17:57:59,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:57:59,399 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand 29 states. [2020-10-14 17:58:00,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:58:00,125 INFO L93 Difference]: Finished difference Result 94 states and 122 transitions. [2020-10-14 17:58:00,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 17:58:00,126 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 47 [2020-10-14 17:58:00,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:58:00,127 INFO L225 Difference]: With dead ends: 94 [2020-10-14 17:58:00,128 INFO L226 Difference]: Without dead ends: 81 [2020-10-14 17:58:00,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 17:58:00,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-14 17:58:00,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 60. [2020-10-14 17:58:00,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-14 17:58:00,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2020-10-14 17:58:00,140 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 47 [2020-10-14 17:58:00,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:58:00,140 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2020-10-14 17:58:00,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 17:58:00,140 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2020-10-14 17:58:00,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 17:58:00,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:58:00,141 INFO L422 BasicCegarLoop]: trace histogram [25, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:58:00,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 17:58:00,141 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:58:00,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:58:00,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1814505184, now seen corresponding path program 25 times [2020-10-14 17:58:00,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:58:00,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243346070] [2020-10-14 17:58:00,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:58:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:58:00,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:00,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:00,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:02,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:03,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:58:03,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 17:58:03,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:58:03,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3640 [2020-10-14 17:58:03,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:58:03,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:58:03,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 17:58:03,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:58:03,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 17:58:03,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:58:05,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:58:05,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:58:05,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:05,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:58:05,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:58:05,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:58:05,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:58:05,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:58:05,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:58:05,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:58:05,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:58:05,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:58:05,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:58:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 1 proven. 327 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:58:05,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243346070] [2020-10-14 17:58:05,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:58:05,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 17:58:05,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362080238] [2020-10-14 17:58:05,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 17:58:05,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:58:05,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 17:58:05,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=746, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 17:58:05,752 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 35 states. [2020-10-14 17:58:06,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:58:06,509 INFO L93 Difference]: Finished difference Result 100 states and 133 transitions. [2020-10-14 17:58:06,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 17:58:06,510 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 46 [2020-10-14 17:58:06,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:58:06,511 INFO L225 Difference]: With dead ends: 100 [2020-10-14 17:58:06,511 INFO L226 Difference]: Without dead ends: 98 [2020-10-14 17:58:06,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=546, Invalid=1014, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 17:58:06,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-14 17:58:06,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2020-10-14 17:58:06,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-14 17:58:06,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2020-10-14 17:58:06,523 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 46 [2020-10-14 17:58:06,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:58:06,524 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2020-10-14 17:58:06,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 17:58:06,524 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2020-10-14 17:58:06,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 17:58:06,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:58:06,525 INFO L422 BasicCegarLoop]: trace histogram [26, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:58:06,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 17:58:06,525 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:58:06,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:58:06,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1788802778, now seen corresponding path program 26 times [2020-10-14 17:58:06,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:58:06,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27483280] [2020-10-14 17:58:06,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:58:06,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:58:06,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:06,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:06,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:08,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:10,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:58:10,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 17:58:10,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:58:10,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3699 [2020-10-14 17:58:10,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:58:10,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:58:10,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 17:58:10,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:58:10,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 17:58:10,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:58:12,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:58:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:58:12,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:12,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:58:12,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:58:12,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:58:12,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:58:12,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:58:12,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:58:12,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:58:12,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:58:12,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:58:12,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:58:12,305 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 1 proven. 353 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:58:12,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27483280] [2020-10-14 17:58:12,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:58:12,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 17:58:12,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877706074] [2020-10-14 17:58:12,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 17:58:12,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:58:12,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 17:58:12,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=786, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 17:58:12,307 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 36 states. [2020-10-14 17:58:13,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:58:13,152 INFO L93 Difference]: Finished difference Result 102 states and 137 transitions. [2020-10-14 17:58:13,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 17:58:13,153 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 47 [2020-10-14 17:58:13,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:58:13,154 INFO L225 Difference]: With dead ends: 102 [2020-10-14 17:58:13,154 INFO L226 Difference]: Without dead ends: 100 [2020-10-14 17:58:13,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=584, Invalid=1138, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 17:58:13,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-14 17:58:13,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 62. [2020-10-14 17:58:13,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 17:58:13,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-10-14 17:58:13,168 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 47 [2020-10-14 17:58:13,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:58:13,168 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-10-14 17:58:13,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 17:58:13,168 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-10-14 17:58:13,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 17:58:13,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:58:13,169 INFO L422 BasicCegarLoop]: trace histogram [20, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:58:13,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 17:58:13,169 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:58:13,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:58:13,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1946242735, now seen corresponding path program 13 times [2020-10-14 17:58:13,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:58:13,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999314006] [2020-10-14 17:58:13,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:58:13,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:58:13,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:13,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:13,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:13,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:13,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:17,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:18,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:58:18,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 17:58:18,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:58:18,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:58:18,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:58:18,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:58:18,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 17:58:18,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:58:18,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-14 17:58:18,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:58:19,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:58:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:58:19,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:19,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:58:19,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:58:19,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:58:19,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:58:19,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:58:19,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:58:19,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:58:19,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:58:19,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:58:19,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:58:19,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-14 17:58:19,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:58:19,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:19,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:58:19,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:58:19,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:58:19,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:58:19,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:58:19,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:58:19,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:58:19,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:58:19,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:58:19,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:58:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 2 proven. 215 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:58:19,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999314006] [2020-10-14 17:58:19,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:58:19,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 17:58:19,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053844872] [2020-10-14 17:58:19,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 17:58:19,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:58:19,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 17:58:19,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=621, Unknown=0, NotChecked=0, Total=930 [2020-10-14 17:58:19,656 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 31 states. [2020-10-14 17:58:20,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:58:20,488 INFO L93 Difference]: Finished difference Result 98 states and 128 transitions. [2020-10-14 17:58:20,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 17:58:20,489 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 49 [2020-10-14 17:58:20,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:58:20,490 INFO L225 Difference]: With dead ends: 98 [2020-10-14 17:58:20,490 INFO L226 Difference]: Without dead ends: 85 [2020-10-14 17:58:20,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=441, Invalid=965, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 17:58:20,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-14 17:58:20,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-14 17:58:20,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 17:58:20,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2020-10-14 17:58:20,505 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 49 [2020-10-14 17:58:20,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:58:20,505 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2020-10-14 17:58:20,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 17:58:20,505 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2020-10-14 17:58:20,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 17:58:20,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:58:20,506 INFO L422 BasicCegarLoop]: trace histogram [27, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:58:20,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 17:58:20,506 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:58:20,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:58:20,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1822199904, now seen corresponding path program 27 times [2020-10-14 17:58:20,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:58:20,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21945962] [2020-10-14 17:58:20,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:58:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:58:20,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:20,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:20,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:22,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:24,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:58:24,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 17:58:24,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:58:24,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4313 [2020-10-14 17:58:24,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:58:24,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:58:24,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 17:58:24,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:58:24,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 17:58:24,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:58:27,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:58:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:58:27,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:27,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:58:27,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:58:27,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:58:27,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:58:27,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:58:27,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:58:27,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:58:27,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:58:27,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:58:27,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:58:27,161 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 1 proven. 380 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:58:27,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21945962] [2020-10-14 17:58:27,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:58:27,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 17:58:27,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764207507] [2020-10-14 17:58:27,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 17:58:27,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:58:27,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 17:58:27,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=827, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 17:58:27,163 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 37 states. [2020-10-14 17:58:27,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:58:27,881 INFO L93 Difference]: Finished difference Result 104 states and 139 transitions. [2020-10-14 17:58:27,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 17:58:27,882 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 48 [2020-10-14 17:58:27,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:58:27,883 INFO L225 Difference]: With dead ends: 104 [2020-10-14 17:58:27,884 INFO L226 Difference]: Without dead ends: 102 [2020-10-14 17:58:27,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=613, Invalid=1109, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 17:58:27,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-14 17:58:27,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 63. [2020-10-14 17:58:27,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-14 17:58:27,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2020-10-14 17:58:27,898 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 48 [2020-10-14 17:58:27,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:58:27,898 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2020-10-14 17:58:27,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 17:58:27,899 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2020-10-14 17:58:27,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 17:58:27,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:58:27,899 INFO L422 BasicCegarLoop]: trace histogram [28, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:58:27,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 17:58:27,899 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:58:27,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:58:27,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1437456486, now seen corresponding path program 28 times [2020-10-14 17:58:27,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:58:27,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862281052] [2020-10-14 17:58:27,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:58:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:58:27,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:27,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:28,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:30,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:32,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:58:32,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 17:58:32,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:58:32,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4396 [2020-10-14 17:58:32,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:58:32,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:58:32,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 17:58:32,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:58:32,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 17:58:32,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:58:34,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:58:34,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:58:34,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:34,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:58:34,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:58:34,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:58:34,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:58:34,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:58:34,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:58:34,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:58:34,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:58:34,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:58:34,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:58:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 1 proven. 408 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:58:34,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862281052] [2020-10-14 17:58:34,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:58:34,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 17:58:34,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825587392] [2020-10-14 17:58:34,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 17:58:34,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:58:34,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 17:58:34,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=869, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 17:58:34,767 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 38 states. [2020-10-14 17:58:35,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:58:35,670 INFO L93 Difference]: Finished difference Result 106 states and 143 transitions. [2020-10-14 17:58:35,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 17:58:35,671 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 49 [2020-10-14 17:58:35,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:58:35,672 INFO L225 Difference]: With dead ends: 106 [2020-10-14 17:58:35,672 INFO L226 Difference]: Without dead ends: 104 [2020-10-14 17:58:35,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=648, Invalid=1158, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 17:58:35,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-14 17:58:35,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 64. [2020-10-14 17:58:35,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-14 17:58:35,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-10-14 17:58:35,689 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 49 [2020-10-14 17:58:35,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:58:35,690 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-10-14 17:58:35,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-14 17:58:35,690 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-10-14 17:58:35,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 17:58:35,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:58:35,691 INFO L422 BasicCegarLoop]: trace histogram [22, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:58:35,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 17:58:35,691 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:58:35,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:58:35,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1415007727, now seen corresponding path program 14 times [2020-10-14 17:58:35,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:58:35,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368708004] [2020-10-14 17:58:35,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:58:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:58:35,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:35,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:35,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:35,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:36,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:39,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:40,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:58:40,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 17:58:40,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:58:40,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:58:40,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:58:40,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:58:40,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 17:58:40,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:58:40,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 17:58:40,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:58:42,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:58:42,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:58:42,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:42,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:58:42,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:58:42,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:58:42,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:58:42,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:58:42,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:58:42,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:58:42,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:58:42,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:58:42,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:58:42,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-14 17:58:42,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:58:42,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:42,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:58:42,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:58:42,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:58:42,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:58:42,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:58:42,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:58:42,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:58:42,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:58:42,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:58:42,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:58:42,468 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 2 proven. 258 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:58:42,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368708004] [2020-10-14 17:58:42,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:58:42,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 17:58:42,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313715046] [2020-10-14 17:58:42,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 17:58:42,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:58:42,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 17:58:42,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:58:42,470 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 33 states. [2020-10-14 17:58:43,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:58:43,442 INFO L93 Difference]: Finished difference Result 102 states and 134 transitions. [2020-10-14 17:58:43,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 17:58:43,443 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 51 [2020-10-14 17:58:43,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:58:43,444 INFO L225 Difference]: With dead ends: 102 [2020-10-14 17:58:43,444 INFO L226 Difference]: Without dead ends: 89 [2020-10-14 17:58:43,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=502, Invalid=1058, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 17:58:43,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-14 17:58:43,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 64. [2020-10-14 17:58:43,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-14 17:58:43,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2020-10-14 17:58:43,465 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 51 [2020-10-14 17:58:43,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:58:43,465 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2020-10-14 17:58:43,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 17:58:43,465 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2020-10-14 17:58:43,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 17:58:43,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:58:43,466 INFO L422 BasicCegarLoop]: trace histogram [29, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:58:43,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 17:58:43,467 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:58:43,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:58:43,467 INFO L82 PathProgramCache]: Analyzing trace with hash 592410528, now seen corresponding path program 29 times [2020-10-14 17:58:43,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:58:43,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256400271] [2020-10-14 17:58:43,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:58:43,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:58:43,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:43,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:43,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:45,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:48,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:58:48,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 17:58:48,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:58:48,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4788 [2020-10-14 17:58:48,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:58:48,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:58:48,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 17:58:48,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:58:48,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 17:58:48,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:58:51,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:58:51,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:58:51,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:51,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:58:51,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:58:51,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:58:51,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:58:51,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:58:51,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:58:51,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:58:51,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:58:51,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:58:51,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:58:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 1 proven. 437 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:58:51,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256400271] [2020-10-14 17:58:51,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:58:51,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 17:58:51,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932366902] [2020-10-14 17:58:51,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 17:58:51,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:58:51,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 17:58:51,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 17:58:51,039 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 39 states. [2020-10-14 17:58:52,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:58:52,035 INFO L93 Difference]: Finished difference Result 108 states and 145 transitions. [2020-10-14 17:58:52,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 17:58:52,036 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 50 [2020-10-14 17:58:52,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:58:52,037 INFO L225 Difference]: With dead ends: 108 [2020-10-14 17:58:52,037 INFO L226 Difference]: Without dead ends: 106 [2020-10-14 17:58:52,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=689, Invalid=1291, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 17:58:52,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-14 17:58:52,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 65. [2020-10-14 17:58:52,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 17:58:52,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2020-10-14 17:58:52,052 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 50 [2020-10-14 17:58:52,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:58:52,053 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2020-10-14 17:58:52,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 17:58:52,053 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2020-10-14 17:58:52,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 17:58:52,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:58:52,053 INFO L422 BasicCegarLoop]: trace histogram [30, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:58:52,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 17:58:52,053 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:58:52,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:58:52,054 INFO L82 PathProgramCache]: Analyzing trace with hash -906221478, now seen corresponding path program 30 times [2020-10-14 17:58:52,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:58:52,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098626339] [2020-10-14 17:58:52,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:58:52,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:58:52,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:52,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:52,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:54,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:57,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:58:57,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 17:58:57,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:58:57,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:58:57,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:58:57,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:58:57,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 17:58:57,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:58:57,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-14 17:58:57,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:58:59,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:58:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:58:59,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:58:59,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:58:59,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:58:59,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:58:59,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:58:59,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:58:59,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:58:59,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:58:59,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:58:59,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:58:59,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:58:59,935 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 1 proven. 467 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:58:59,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098626339] [2020-10-14 17:58:59,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:58:59,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 17:58:59,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606078286] [2020-10-14 17:58:59,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 17:58:59,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:58:59,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 17:58:59,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=604, Invalid=956, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 17:58:59,937 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand 40 states. [2020-10-14 17:59:01,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:59:01,051 INFO L93 Difference]: Finished difference Result 110 states and 149 transitions. [2020-10-14 17:59:01,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 17:59:01,052 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 51 [2020-10-14 17:59:01,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:59:01,053 INFO L225 Difference]: With dead ends: 110 [2020-10-14 17:59:01,053 INFO L226 Difference]: Without dead ends: 108 [2020-10-14 17:59:01,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=726, Invalid=1344, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 17:59:01,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-14 17:59:01,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 66. [2020-10-14 17:59:01,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-14 17:59:01,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2020-10-14 17:59:01,069 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 51 [2020-10-14 17:59:01,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:59:01,069 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2020-10-14 17:59:01,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 17:59:01,070 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2020-10-14 17:59:01,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 17:59:01,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:59:01,070 INFO L422 BasicCegarLoop]: trace histogram [24, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:59:01,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 17:59:01,071 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:59:01,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:59:01,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1999273263, now seen corresponding path program 15 times [2020-10-14 17:59:01,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:59:01,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571210566] [2020-10-14 17:59:01,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:59:01,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:01,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:01,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:01,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:01,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:02,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:05,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:06,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:06,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 17:59:06,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:59:06,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:59:06,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:06,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:06,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 17:59:06,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:59:06,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 17:59:06,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:59:08,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:59:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:08,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:08,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:08,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:59:08,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:08,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:59:08,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:08,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:08,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:59:08,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:59:08,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:59:08,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:59:08,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-14 17:59:08,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:08,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:08,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:08,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:59:08,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:08,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:59:08,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:08,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:08,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:59:08,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:59:08,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:59:08,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:59:08,166 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 2 proven. 305 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:59:08,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571210566] [2020-10-14 17:59:08,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:59:08,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 17:59:08,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983384885] [2020-10-14 17:59:08,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 17:59:08,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:59:08,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 17:59:08,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=775, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 17:59:08,168 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand 35 states. [2020-10-14 17:59:09,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:59:09,285 INFO L93 Difference]: Finished difference Result 106 states and 140 transitions. [2020-10-14 17:59:09,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 17:59:09,290 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 53 [2020-10-14 17:59:09,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:59:09,291 INFO L225 Difference]: With dead ends: 106 [2020-10-14 17:59:09,291 INFO L226 Difference]: Without dead ends: 93 [2020-10-14 17:59:09,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=567, Invalid=1155, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 17:59:09,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-14 17:59:09,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 66. [2020-10-14 17:59:09,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-14 17:59:09,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2020-10-14 17:59:09,317 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 53 [2020-10-14 17:59:09,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:59:09,317 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2020-10-14 17:59:09,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 17:59:09,317 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2020-10-14 17:59:09,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 17:59:09,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:59:09,318 INFO L422 BasicCegarLoop]: trace histogram [31, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:59:09,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 17:59:09,319 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:59:09,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:59:09,319 INFO L82 PathProgramCache]: Analyzing trace with hash -119173408, now seen corresponding path program 31 times [2020-10-14 17:59:09,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:59:09,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444001265] [2020-10-14 17:59:09,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:59:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:09,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:09,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:09,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:11,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:14,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:14,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 17:59:14,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:59:14,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 17:59:14,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:14,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:14,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 17:59:14,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:59:14,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 17:59:14,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:59:17,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:59:17,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:17,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:17,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:17,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:59:17,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:17,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:59:17,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:17,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:17,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:59:17,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:59:17,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:59:17,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:59:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 1 proven. 498 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:59:17,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444001265] [2020-10-14 17:59:17,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:59:17,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-14 17:59:17,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352671470] [2020-10-14 17:59:17,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-14 17:59:17,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:59:17,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-14 17:59:17,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=639, Invalid=1001, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 17:59:17,346 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 41 states. [2020-10-14 17:59:18,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:59:18,494 INFO L93 Difference]: Finished difference Result 112 states and 151 transitions. [2020-10-14 17:59:18,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-14 17:59:18,496 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 52 [2020-10-14 17:59:18,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:59:18,498 INFO L225 Difference]: With dead ends: 112 [2020-10-14 17:59:18,498 INFO L226 Difference]: Without dead ends: 110 [2020-10-14 17:59:18,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=764, Invalid=1398, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 17:59:18,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-14 17:59:18,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 67. [2020-10-14 17:59:18,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 17:59:18,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2020-10-14 17:59:18,515 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 52 [2020-10-14 17:59:18,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:59:18,516 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2020-10-14 17:59:18,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-14 17:59:18,516 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2020-10-14 17:59:18,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 17:59:18,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:59:18,516 INFO L422 BasicCegarLoop]: trace histogram [32, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:59:18,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 17:59:18,517 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:59:18,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:59:18,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1490487014, now seen corresponding path program 32 times [2020-10-14 17:59:18,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:59:18,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918719468] [2020-10-14 17:59:18,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:59:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:18,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:18,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:18,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:21,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:23,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:23,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 17:59:23,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:59:23,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:59:23,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:23,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:23,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-14 17:59:23,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:59:23,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 17:59:23,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:59:26,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:59:26,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:26,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:26,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:26,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:59:26,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:26,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:59:26,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:26,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:26,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:59:26,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:59:26,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:59:26,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:59:26,796 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 1 proven. 530 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:59:26,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918719468] [2020-10-14 17:59:26,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:59:26,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-14 17:59:26,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306705867] [2020-10-14 17:59:26,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-14 17:59:26,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:59:26,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-14 17:59:26,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=1047, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 17:59:26,797 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand 42 states. [2020-10-14 17:59:27,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:59:27,956 INFO L93 Difference]: Finished difference Result 114 states and 155 transitions. [2020-10-14 17:59:27,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 17:59:27,958 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 53 [2020-10-14 17:59:27,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:59:27,958 INFO L225 Difference]: With dead ends: 114 [2020-10-14 17:59:27,959 INFO L226 Difference]: Without dead ends: 112 [2020-10-14 17:59:27,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=803, Invalid=1453, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 17:59:27,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-14 17:59:27,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 68. [2020-10-14 17:59:27,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-14 17:59:27,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2020-10-14 17:59:27,983 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 53 [2020-10-14 17:59:27,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:59:27,984 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2020-10-14 17:59:27,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-14 17:59:27,984 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2020-10-14 17:59:27,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 17:59:27,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:59:27,985 INFO L422 BasicCegarLoop]: trace histogram [26, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:59:27,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 17:59:27,985 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:59:27,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:59:27,985 INFO L82 PathProgramCache]: Analyzing trace with hash -837737583, now seen corresponding path program 16 times [2020-10-14 17:59:27,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:59:27,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286470960] [2020-10-14 17:59:27,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:59:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:27,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:28,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:28,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:28,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:30,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:32,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:32,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:32,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 17:59:32,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:59:32,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 17:59:32,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:32,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:32,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 17:59:32,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:59:32,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 17:59:32,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:34,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:59:34,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:34,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:34,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:34,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:59:34,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:34,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:59:34,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:34,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:34,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:59:34,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:59:34,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:59:34,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:59:34,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-14 17:59:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:34,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:34,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:34,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:59:34,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:34,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:59:34,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:34,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:34,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:59:34,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:59:34,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:59:34,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:59:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 2 proven. 356 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:59:34,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286470960] [2020-10-14 17:59:34,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:59:34,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 17:59:34,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4658539] [2020-10-14 17:59:34,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 17:59:34,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:59:34,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 17:59:34,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=858, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 17:59:34,339 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 37 states. [2020-10-14 17:59:35,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:59:35,694 INFO L93 Difference]: Finished difference Result 110 states and 146 transitions. [2020-10-14 17:59:35,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 17:59:35,695 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 55 [2020-10-14 17:59:35,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:59:35,696 INFO L225 Difference]: With dead ends: 110 [2020-10-14 17:59:35,696 INFO L226 Difference]: Without dead ends: 97 [2020-10-14 17:59:35,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=641, Invalid=1339, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 17:59:35,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-14 17:59:35,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2020-10-14 17:59:35,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-14 17:59:35,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2020-10-14 17:59:35,721 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 55 [2020-10-14 17:59:35,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:59:35,721 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2020-10-14 17:59:35,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 17:59:35,721 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2020-10-14 17:59:35,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 17:59:35,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:59:35,722 INFO L422 BasicCegarLoop]: trace histogram [33, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:59:35,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 17:59:35,722 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:59:35,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:59:35,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1051535840, now seen corresponding path program 33 times [2020-10-14 17:59:35,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:59:35,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381462319] [2020-10-14 17:59:35,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:59:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:35,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:35,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:35,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:39,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:40,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:40,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 17:59:40,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:59:40,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 17:59:40,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:40,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:40,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-14 17:59:40,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:59:40,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 17:59:40,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0