/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/relax-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 17:43:58,749 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 17:43:58,751 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 17:43:58,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 17:43:58,774 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 17:43:58,775 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 17:43:58,777 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 17:43:58,778 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 17:43:58,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 17:43:58,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 17:43:58,784 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 17:43:58,788 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 17:43:58,789 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 17:43:58,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 17:43:58,792 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 17:43:58,793 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 17:43:58,793 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 17:43:58,794 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 17:43:58,795 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 17:43:58,800 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 17:43:58,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 17:43:58,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 17:43:58,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 17:43:58,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 17:43:58,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 17:43:58,809 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 17:43:58,809 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 17:43:58,810 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 17:43:58,810 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 17:43:58,811 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 17:43:58,811 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 17:43:58,812 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 17:43:58,812 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 17:43:58,813 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 17:43:58,814 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 17:43:58,814 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 17:43:58,815 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 17:43:58,815 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 17:43:58,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 17:43:58,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 17:43:58,816 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 17:43:58,817 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 17:43:58,839 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 17:43:58,840 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 17:43:58,841 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 17:43:58,841 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 17:43:58,841 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 17:43:58,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 17:43:58,842 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 17:43:58,842 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 17:43:58,842 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 17:43:58,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 17:43:58,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 17:43:58,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 17:43:58,843 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 17:43:58,843 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 17:43:58,843 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 17:43:58,843 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 17:43:58,843 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 17:43:58,844 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 17:43:58,844 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 17:43:58,844 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 17:43:58,844 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 17:43:58,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:43:58,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 17:43:58,845 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 17:43:58,845 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 17:43:58,845 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 17:43:58,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 17:43:58,845 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 17:43:58,846 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 17:43:58,846 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 17:43:59,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 17:43:59,142 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 17:43:59,148 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 17:43:59,150 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 17:43:59,151 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 17:43:59,151 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/relax-2.i [2020-10-14 17:43:59,209 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/60414e398/172beebefbfc4538afa8ee7427c364b9/FLAG83b498395 [2020-10-14 17:43:59,656 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 17:43:59,657 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/relax-2.i [2020-10-14 17:43:59,673 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/60414e398/172beebefbfc4538afa8ee7427c364b9/FLAG83b498395 [2020-10-14 17:44:00,020 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/60414e398/172beebefbfc4538afa8ee7427c364b9 [2020-10-14 17:44:00,029 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 17:44:00,031 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 17:44:00,032 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 17:44:00,032 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 17:44:00,036 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 17:44:00,036 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:44:00" (1/1) ... [2020-10-14 17:44:00,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@750e1b8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:00, skipping insertion in model container [2020-10-14 17:44:00,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:44:00" (1/1) ... [2020-10-14 17:44:00,047 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 17:44:00,097 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 17:44:00,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:44:00,523 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 17:44:00,592 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:44:00,642 INFO L208 MainTranslator]: Completed translation [2020-10-14 17:44:00,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:00 WrapperNode [2020-10-14 17:44:00,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 17:44:00,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 17:44:00,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 17:44:00,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 17:44:00,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:00" (1/1) ... [2020-10-14 17:44:00,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:00" (1/1) ... [2020-10-14 17:44:00,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:00" (1/1) ... [2020-10-14 17:44:00,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:00" (1/1) ... [2020-10-14 17:44:00,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:00" (1/1) ... [2020-10-14 17:44:00,698 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:00" (1/1) ... [2020-10-14 17:44:00,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:00" (1/1) ... [2020-10-14 17:44:00,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 17:44:00,708 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 17:44:00,708 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 17:44:00,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 17:44:00,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:00" (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 17:44:00,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 17:44:00,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 17:44:00,770 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 17:44:00,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 17:44:00,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-14 17:44:00,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-14 17:44:00,770 INFO L138 BoogieDeclarations]: Found implementation of procedure is_relaxed_prefix [2020-10-14 17:44:00,771 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 17:44:00,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-10-14 17:44:00,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 17:44:00,771 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 17:44:00,771 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 17:44:00,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 17:44:00,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 17:44:00,772 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-14 17:44:00,772 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-14 17:44:00,772 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-14 17:44:00,772 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-14 17:44:00,773 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-14 17:44:00,773 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-14 17:44:00,773 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-14 17:44:00,773 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-14 17:44:00,773 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-14 17:44:00,773 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-14 17:44:00,774 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-14 17:44:00,774 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-14 17:44:00,774 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-14 17:44:00,774 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-14 17:44:00,774 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-14 17:44:00,774 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-14 17:44:00,775 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-14 17:44:00,775 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-14 17:44:00,775 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-14 17:44:00,775 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-14 17:44:00,775 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-14 17:44:00,775 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-14 17:44:00,775 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-14 17:44:00,776 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-14 17:44:00,776 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-14 17:44:00,776 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-14 17:44:00,776 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-14 17:44:00,776 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-14 17:44:00,776 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-14 17:44:00,777 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-14 17:44:00,777 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-14 17:44:00,777 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-14 17:44:00,777 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-14 17:44:00,777 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-14 17:44:00,777 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-14 17:44:00,778 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-14 17:44:00,778 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-14 17:44:00,778 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-14 17:44:00,778 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-14 17:44:00,778 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-14 17:44:00,778 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-14 17:44:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-14 17:44:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-14 17:44:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-14 17:44:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-14 17:44:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-14 17:44:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-14 17:44:00,780 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-14 17:44:00,780 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-14 17:44:00,780 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-14 17:44:00,780 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-14 17:44:00,780 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-14 17:44:00,780 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 17:44:00,780 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-14 17:44:00,781 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-14 17:44:00,781 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-14 17:44:00,781 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-14 17:44:00,781 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-14 17:44:00,781 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-14 17:44:00,781 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-14 17:44:00,782 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-14 17:44:00,782 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-14 17:44:00,782 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 17:44:00,782 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-14 17:44:00,782 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-14 17:44:00,782 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-14 17:44:00,782 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-14 17:44:00,783 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-14 17:44:00,783 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-14 17:44:00,783 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-14 17:44:00,783 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-14 17:44:00,783 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-14 17:44:00,783 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-14 17:44:00,783 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-14 17:44:00,784 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-14 17:44:00,784 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-14 17:44:00,784 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-14 17:44:00,784 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-14 17:44:00,784 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-14 17:44:00,784 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-14 17:44:00,784 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-14 17:44:00,785 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-14 17:44:00,785 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-14 17:44:00,785 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-14 17:44:00,785 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-14 17:44:00,785 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-14 17:44:00,785 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-14 17:44:00,785 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-14 17:44:00,786 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-14 17:44:00,786 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-14 17:44:00,786 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-14 17:44:00,786 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-14 17:44:00,786 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-14 17:44:00,786 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-14 17:44:00,786 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-14 17:44:00,787 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-14 17:44:00,787 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-14 17:44:00,787 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-14 17:44:00,787 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-14 17:44:00,787 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-14 17:44:00,787 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-14 17:44:00,787 INFO L130 BoogieDeclarations]: Found specification of procedure is_relaxed_prefix [2020-10-14 17:44:00,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 17:44:00,788 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 17:44:00,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 17:44:00,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 17:44:00,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 17:44:00,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 17:44:00,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 17:44:01,332 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 17:44:01,332 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-14 17:44:01,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:44:01 BoogieIcfgContainer [2020-10-14 17:44:01,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 17:44:01,338 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 17:44:01,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 17:44:01,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 17:44:01,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:44:00" (1/3) ... [2020-10-14 17:44:01,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b3cbee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:44:01, skipping insertion in model container [2020-10-14 17:44:01,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:00" (2/3) ... [2020-10-14 17:44:01,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b3cbee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:44:01, skipping insertion in model container [2020-10-14 17:44:01,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:44:01" (3/3) ... [2020-10-14 17:44:01,344 INFO L109 eAbstractionObserver]: Analyzing ICFG relax-2.i [2020-10-14 17:44:01,355 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 17:44:01,362 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 17:44:01,376 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 17:44:01,395 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 17:44:01,396 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 17:44:01,396 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 17:44:01,396 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 17:44:01,396 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 17:44:01,396 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 17:44:01,397 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 17:44:01,397 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 17:44:01,412 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2020-10-14 17:44:01,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 17:44:01,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:01,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:01,418 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:01,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:01,423 INFO L82 PathProgramCache]: Analyzing trace with hash 15551313, now seen corresponding path program 1 times [2020-10-14 17:44:01,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:01,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181307105] [2020-10-14 17:44:01,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:01,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:01,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:01,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:01,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:02,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:02,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 17:44:02,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:44:02,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 599 [2020-10-14 17:44:02,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:02,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:02,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 17:44:02,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 17:44:02,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 17:44:02,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 17:44:02,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:02,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:02,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:02,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:02,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:02,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:02,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 17:44:02,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:02,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:02,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:02,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:02,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:02,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:02,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 17:44:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:02,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:02,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:02,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:44:02,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:02,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-14 17:44:02,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:02,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:02,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 17:44:02,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:02,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 17:44:02,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:02,345 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 17:44:02,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181307105] [2020-10-14 17:44:02,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:44:02,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 17:44:02,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037085097] [2020-10-14 17:44:02,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 17:44:02,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:02,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 17:44:02,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 17:44:02,373 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 5 states. [2020-10-14 17:44:02,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:02,641 INFO L93 Difference]: Finished difference Result 111 states and 168 transitions. [2020-10-14 17:44:02,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 17:44:02,643 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-14 17:44:02,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:02,653 INFO L225 Difference]: With dead ends: 111 [2020-10-14 17:44:02,654 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 17:44:02,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:44:02,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 17:44:02,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-14 17:44:02,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-14 17:44:02,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2020-10-14 17:44:02,705 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 19 [2020-10-14 17:44:02,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:02,706 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2020-10-14 17:44:02,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 17:44:02,706 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2020-10-14 17:44:02,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 17:44:02,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:02,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:02,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 17:44:02,708 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:02,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:02,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1675761359, now seen corresponding path program 1 times [2020-10-14 17:44:02,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:02,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500862242] [2020-10-14 17:44:02,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:02,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:02,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:03,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:03,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 17:44:03,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:44:03,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 647 [2020-10-14 17:44:03,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:03,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:03,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 17:44:03,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:44:03,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 17:44:03,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:03,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:03,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:03,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:03,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:03,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:03,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:44:03,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:03,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:03,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:03,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:03,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:03,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:03,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 17:44:03,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:03,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:03,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:03,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-14 17:44:03,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:03,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-14 17:44:03,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:03,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:03,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:44:03,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:03,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 17:44:03,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:03,496 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 17:44:03,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500862242] [2020-10-14 17:44:03,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:44:03,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 17:44:03,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899785562] [2020-10-14 17:44:03,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 17:44:03,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:03,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 17:44:03,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 17:44:03,500 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand 7 states. [2020-10-14 17:44:03,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:03,804 INFO L93 Difference]: Finished difference Result 104 states and 137 transitions. [2020-10-14 17:44:03,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 17:44:03,805 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-14 17:44:03,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:03,807 INFO L225 Difference]: With dead ends: 104 [2020-10-14 17:44:03,807 INFO L226 Difference]: Without dead ends: 68 [2020-10-14 17:44:03,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:44:03,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-14 17:44:03,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2020-10-14 17:44:03,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 17:44:03,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 86 transitions. [2020-10-14 17:44:03,823 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 86 transitions. Word has length 21 [2020-10-14 17:44:03,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:03,823 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 86 transitions. [2020-10-14 17:44:03,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 17:44:03,823 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 86 transitions. [2020-10-14 17:44:03,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 17:44:03,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:03,825 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:03,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 17:44:03,825 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:03,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:03,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1478058804, now seen corresponding path program 1 times [2020-10-14 17:44:03,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:03,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998847468] [2020-10-14 17:44:03,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:03,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:03,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:03,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:03,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:04,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:04,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 17:44:04,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:44:04,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 540 [2020-10-14 17:44:04,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:04,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:04,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 17:44:04,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:44:04,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 17:44:04,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:04,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:04,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:04,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:04,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:04,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:04,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:04,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:44:04,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:04,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:04,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:04,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:04,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:04,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:04,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 17:44:04,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:04,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:04,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:04,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:44:04,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:04,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-14 17:44:04,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:04,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:04,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 17:44:04,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:04,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 17:44:04,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:04,596 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 17:44:04,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998847468] [2020-10-14 17:44:04,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:44:04,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-14 17:44:04,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24258685] [2020-10-14 17:44:04,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 17:44:04,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:04,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 17:44:04,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 17:44:04,600 INFO L87 Difference]: Start difference. First operand 65 states and 86 transitions. Second operand 8 states. [2020-10-14 17:44:05,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:05,224 INFO L93 Difference]: Finished difference Result 120 states and 162 transitions. [2020-10-14 17:44:05,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 17:44:05,224 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-14 17:44:05,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:05,228 INFO L225 Difference]: With dead ends: 120 [2020-10-14 17:44:05,228 INFO L226 Difference]: Without dead ends: 84 [2020-10-14 17:44:05,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:44:05,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-14 17:44:05,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2020-10-14 17:44:05,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 17:44:05,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 105 transitions. [2020-10-14 17:44:05,249 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 105 transitions. Word has length 22 [2020-10-14 17:44:05,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:05,249 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 105 transitions. [2020-10-14 17:44:05,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 17:44:05,250 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 105 transitions. [2020-10-14 17:44:05,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 17:44:05,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:05,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:05,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 17:44:05,253 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:05,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:05,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1840857741, now seen corresponding path program 1 times [2020-10-14 17:44:05,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:05,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079903321] [2020-10-14 17:44:05,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:05,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:05,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:05,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:06,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:06,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 17:44:06,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:44:06,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 841 [2020-10-14 17:44:06,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:06,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:06,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:44:06,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:44:06,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 17:44:06,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:06,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:06,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:06,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:06,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:06,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:06,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:44:06,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:06,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:06,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:06,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:06,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:06,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:06,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-14 17:44:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:06,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:06,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:06,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-14 17:44:06,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:06,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-14 17:44:06,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:06,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:06,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:44:06,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:06,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 17:44:06,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:06,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:44:06,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079903321] [2020-10-14 17:44:06,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:06,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:44:06,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214125141] [2020-10-14 17:44:06,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:44:06,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:06,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:44:06,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:44:06,336 INFO L87 Difference]: Start difference. First operand 76 states and 105 transitions. Second operand 10 states. [2020-10-14 17:44:07,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:07,020 INFO L93 Difference]: Finished difference Result 142 states and 198 transitions. [2020-10-14 17:44:07,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 17:44:07,020 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-14 17:44:07,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:07,022 INFO L225 Difference]: With dead ends: 142 [2020-10-14 17:44:07,023 INFO L226 Difference]: Without dead ends: 135 [2020-10-14 17:44:07,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:44:07,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-14 17:44:07,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 81. [2020-10-14 17:44:07,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-14 17:44:07,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 114 transitions. [2020-10-14 17:44:07,040 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 114 transitions. Word has length 23 [2020-10-14 17:44:07,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:07,040 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 114 transitions. [2020-10-14 17:44:07,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:44:07,040 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 114 transitions. [2020-10-14 17:44:07,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 17:44:07,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:07,042 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:07,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 17:44:07,042 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:07,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:07,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1286369985, now seen corresponding path program 1 times [2020-10-14 17:44:07,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:07,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870233750] [2020-10-14 17:44:07,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:07,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:07,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:07,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:07,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:07,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:07,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 17:44:07,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:44:07,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-14 17:44:07,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:07,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:07,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:44:07,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 17:44:07,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 17:44:07,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:07,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:07,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:07,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:07,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:07,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:07,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:07,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:44:07,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:07,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:07,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:07,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:07,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:07,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:07,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 17:44:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:07,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:07,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:07,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:07,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-14 17:44:07,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:44:07,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-14 17:44:07,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:07,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:07,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:44:07,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:07,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 17:44:07,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:07,474 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 17:44:07,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870233750] [2020-10-14 17:44:07,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:44:07,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 17:44:07,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134859290] [2020-10-14 17:44:07,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 17:44:07,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:07,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 17:44:07,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:44:07,476 INFO L87 Difference]: Start difference. First operand 81 states and 114 transitions. Second operand 6 states. [2020-10-14 17:44:07,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:07,731 INFO L93 Difference]: Finished difference Result 116 states and 161 transitions. [2020-10-14 17:44:07,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 17:44:07,731 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-14 17:44:07,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:07,733 INFO L225 Difference]: With dead ends: 116 [2020-10-14 17:44:07,733 INFO L226 Difference]: Without dead ends: 105 [2020-10-14 17:44:07,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 17:44:07,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-14 17:44:07,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 92. [2020-10-14 17:44:07,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-14 17:44:07,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 129 transitions. [2020-10-14 17:44:07,749 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 129 transitions. Word has length 24 [2020-10-14 17:44:07,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:07,749 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 129 transitions. [2020-10-14 17:44:07,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 17:44:07,749 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 129 transitions. [2020-10-14 17:44:07,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 17:44:07,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:07,752 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:07,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 17:44:07,752 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:07,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:07,752 INFO L82 PathProgramCache]: Analyzing trace with hash -510581374, now seen corresponding path program 1 times [2020-10-14 17:44:07,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:07,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198255538] [2020-10-14 17:44:07,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:07,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:07,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:07,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:07,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 17:44:07,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:07,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-14 17:44:07,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:07,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:07,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 17:44:07,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 17:44:07,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 17:44:07,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 25 [2020-10-14 17:44:07,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:07,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:07,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:07,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:07,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:07,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:07,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:44:07,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:07,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:07,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:07,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:07,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:07,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:07,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 17:44:07,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:07,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:07,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:07,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-14 17:44:07,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:07,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-14 17:44:07,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:07,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:07,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 17:44:07,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:07,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 17:44:07,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:07,930 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 17:44:07,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198255538] [2020-10-14 17:44:07,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:44:07,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 17:44:07,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58042835] [2020-10-14 17:44:07,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 17:44:07,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:07,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 17:44:07,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 17:44:07,932 INFO L87 Difference]: Start difference. First operand 92 states and 129 transitions. Second operand 5 states. [2020-10-14 17:44:08,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:08,072 INFO L93 Difference]: Finished difference Result 111 states and 150 transitions. [2020-10-14 17:44:08,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 17:44:08,073 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-14 17:44:08,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:08,074 INFO L225 Difference]: With dead ends: 111 [2020-10-14 17:44:08,074 INFO L226 Difference]: Without dead ends: 92 [2020-10-14 17:44:08,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:44:08,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-14 17:44:08,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-10-14 17:44:08,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-14 17:44:08,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 124 transitions. [2020-10-14 17:44:08,086 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 124 transitions. Word has length 24 [2020-10-14 17:44:08,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:08,086 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 124 transitions. [2020-10-14 17:44:08,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 17:44:08,086 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 124 transitions. [2020-10-14 17:44:08,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 17:44:08,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:08,088 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:08,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 17:44:08,089 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:08,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:08,089 INFO L82 PathProgramCache]: Analyzing trace with hash 774414606, now seen corresponding path program 1 times [2020-10-14 17:44:08,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:08,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34741965] [2020-10-14 17:44:08,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:08,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:08,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:08,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:08,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:08,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:08,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 17:44:08,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:44:08,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 423 [2020-10-14 17:44:08,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:08,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:08,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 17:44:08,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:44:08,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 17:44:08,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:08,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:08,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:08,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:08,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:08,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:08,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:08,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:44:08,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:08,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:08,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:08,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:08,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:08,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:08,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-14 17:44:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:08,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:08,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:08,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:44:08,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:08,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-14 17:44:08,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:08,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:08,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 17:44:08,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:08,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 17:44:08,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:44:08,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34741965] [2020-10-14 17:44:08,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:08,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 17:44:08,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479546172] [2020-10-14 17:44:08,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 17:44:08,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:08,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 17:44:08,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:44:08,686 INFO L87 Difference]: Start difference. First operand 92 states and 124 transitions. Second operand 9 states. [2020-10-14 17:44:09,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:09,178 INFO L93 Difference]: Finished difference Result 157 states and 213 transitions. [2020-10-14 17:44:09,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 17:44:09,179 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-14 17:44:09,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:09,180 INFO L225 Difference]: With dead ends: 157 [2020-10-14 17:44:09,181 INFO L226 Difference]: Without dead ends: 140 [2020-10-14 17:44:09,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:44:09,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-14 17:44:09,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 97. [2020-10-14 17:44:09,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 17:44:09,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 134 transitions. [2020-10-14 17:44:09,204 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 134 transitions. Word has length 24 [2020-10-14 17:44:09,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:09,207 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 134 transitions. [2020-10-14 17:44:09,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 17:44:09,207 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 134 transitions. [2020-10-14 17:44:09,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 17:44:09,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:09,210 INFO L422 BasicCegarLoop]: trace histogram [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 17:44:09,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 17:44:09,211 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:09,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:09,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1584690891, now seen corresponding path program 2 times [2020-10-14 17:44:09,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:09,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222370182] [2020-10-14 17:44:09,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:09,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:09,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:09,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:09,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:10,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:11,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:11,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 17:44:11,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:44:11,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1872 [2020-10-14 17:44:11,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:11,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:11,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 17:44:11,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 17:44:11,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 17:44:11,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:11,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:11,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:11,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:11,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:11,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:11,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:11,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:44:11,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:11,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:11,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:11,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:11,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:11,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:11,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-14 17:44:11,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:11,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:11,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:11,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-14 17:44:11,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:11,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-14 17:44:11,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:11,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:11,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:44:11,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:11,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 17:44:11,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 17:44:11,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222370182] [2020-10-14 17:44:11,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:44:11,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-14 17:44:11,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002228576] [2020-10-14 17:44:11,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 17:44:11,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:11,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 17:44:11,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 17:44:11,289 INFO L87 Difference]: Start difference. First operand 97 states and 134 transitions. Second operand 8 states. [2020-10-14 17:44:11,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:11,600 INFO L93 Difference]: Finished difference Result 107 states and 143 transitions. [2020-10-14 17:44:11,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 17:44:11,601 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-14 17:44:11,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:11,602 INFO L225 Difference]: With dead ends: 107 [2020-10-14 17:44:11,602 INFO L226 Difference]: Without dead ends: 103 [2020-10-14 17:44:11,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:44:11,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-14 17:44:11,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2020-10-14 17:44:11,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-14 17:44:11,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2020-10-14 17:44:11,613 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 125 transitions. Word has length 25 [2020-10-14 17:44:11,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:11,614 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 125 transitions. [2020-10-14 17:44:11,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 17:44:11,614 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 125 transitions. [2020-10-14 17:44:11,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 17:44:11,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:11,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:11,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 17:44:11,616 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:11,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:11,616 INFO L82 PathProgramCache]: Analyzing trace with hash 520815669, now seen corresponding path program 1 times [2020-10-14 17:44:11,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:11,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212510772] [2020-10-14 17:44:11,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:11,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:11,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:11,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:11,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:12,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:12,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 17:44:12,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:44:12,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1331 [2020-10-14 17:44:12,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:12,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:12,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 17:44:12,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:44:12,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 17:44:12,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:13,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:13,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:13,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:13,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:13,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:13,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:13,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:44:13,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:13,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:13,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:13,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:13,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:13,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:13,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 17:44:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:13,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:13,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:13,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:13,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-14 17:44:13,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:44:13,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-14 17:44:13,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:13,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:13,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:44:13,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 17:44:13,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 17:44:13,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:13,101 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 17:44:13,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212510772] [2020-10-14 17:44:13,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:44:13,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 17:44:13,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352396059] [2020-10-14 17:44:13,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 17:44:13,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:13,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 17:44:13,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 17:44:13,104 INFO L87 Difference]: Start difference. First operand 94 states and 125 transitions. Second operand 7 states. [2020-10-14 17:44:13,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:13,356 INFO L93 Difference]: Finished difference Result 106 states and 139 transitions. [2020-10-14 17:44:13,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 17:44:13,356 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-14 17:44:13,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:13,357 INFO L225 Difference]: With dead ends: 106 [2020-10-14 17:44:13,358 INFO L226 Difference]: Without dead ends: 87 [2020-10-14 17:44:13,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:44:13,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-14 17:44:13,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2020-10-14 17:44:13,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-14 17:44:13,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 106 transitions. [2020-10-14 17:44:13,371 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 106 transitions. Word has length 25 [2020-10-14 17:44:13,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:13,371 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 106 transitions. [2020-10-14 17:44:13,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 17:44:13,371 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 106 transitions. [2020-10-14 17:44:13,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 17:44:13,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:13,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:13,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 17:44:13,373 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:13,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:13,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1933285185, now seen corresponding path program 1 times [2020-10-14 17:44:13,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:13,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821166314] [2020-10-14 17:44:13,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:13,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:13,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:13,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 17:44:13,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:13,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-14 17:44:13,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:13,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:13,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:44:13,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 17:44:13,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 17:44:13,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:13,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:13,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:13,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:13,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:13,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:13,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:13,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:44:13,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:13,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:13,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:13,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:13,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:13,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:13,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-14 17:44:13,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:13,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:13,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:13,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-14 17:44:13,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:13,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 17:44:13,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:13,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:13,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:44:13,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-14 17:44:13,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 17:44:13,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:13,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 17:44:13,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821166314] [2020-10-14 17:44:13,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:44:13,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 17:44:13,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894104176] [2020-10-14 17:44:13,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 17:44:13,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:13,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 17:44:13,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 17:44:13,483 INFO L87 Difference]: Start difference. First operand 82 states and 106 transitions. Second operand 4 states. [2020-10-14 17:44:13,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:13,600 INFO L93 Difference]: Finished difference Result 109 states and 143 transitions. [2020-10-14 17:44:13,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 17:44:13,601 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-14 17:44:13,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:13,602 INFO L225 Difference]: With dead ends: 109 [2020-10-14 17:44:13,602 INFO L226 Difference]: Without dead ends: 91 [2020-10-14 17:44:13,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 17:44:13,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-14 17:44:13,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2020-10-14 17:44:13,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-14 17:44:13,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 112 transitions. [2020-10-14 17:44:13,613 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 112 transitions. Word has length 26 [2020-10-14 17:44:13,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:13,613 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 112 transitions. [2020-10-14 17:44:13,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 17:44:13,613 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 112 transitions. [2020-10-14 17:44:13,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 17:44:13,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:13,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:13,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 17:44:13,615 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:13,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:13,616 INFO L82 PathProgramCache]: Analyzing trace with hash -844238351, now seen corresponding path program 1 times [2020-10-14 17:44:13,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:13,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416523713] [2020-10-14 17:44:13,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:13,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:13,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:13,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:13,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:13,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:15,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:15,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 17:44:15,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:44:15,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1966 [2020-10-14 17:44:15,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:15,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:15,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 17:44:15,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:44:15,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 17:44:15,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:15,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:15,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:15,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:15,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:15,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:15,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:15,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:15,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:15,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:15,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:15,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:15,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:15,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-14 17:44:15,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:15,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:15,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:15,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:15,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-14 17:44:15,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:44:15,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-14 17:44:15,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:15,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:15,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 17:44:15,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:15,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 17:44:15,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:44:15,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416523713] [2020-10-14 17:44:15,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:15,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 17:44:15,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539544853] [2020-10-14 17:44:15,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 17:44:15,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:15,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 17:44:15,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:44:15,818 INFO L87 Difference]: Start difference. First operand 86 states and 112 transitions. Second operand 9 states. [2020-10-14 17:44:18,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:18,460 INFO L93 Difference]: Finished difference Result 173 states and 239 transitions. [2020-10-14 17:44:18,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 17:44:18,461 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-14 17:44:18,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:18,462 INFO L225 Difference]: With dead ends: 173 [2020-10-14 17:44:18,462 INFO L226 Difference]: Without dead ends: 141 [2020-10-14 17:44:18,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:44:18,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-14 17:44:18,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 110. [2020-10-14 17:44:18,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-14 17:44:18,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 149 transitions. [2020-10-14 17:44:18,475 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 149 transitions. Word has length 27 [2020-10-14 17:44:18,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:18,476 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 149 transitions. [2020-10-14 17:44:18,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 17:44:18,476 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 149 transitions. [2020-10-14 17:44:18,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 17:44:18,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:18,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:18,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 17:44:18,478 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:18,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:18,478 INFO L82 PathProgramCache]: Analyzing trace with hash -842391309, now seen corresponding path program 1 times [2020-10-14 17:44:18,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:18,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229125888] [2020-10-14 17:44:18,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:18,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:18,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:18,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:18,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:18,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:19,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:19,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 17:44:19,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:44:19,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1011 [2020-10-14 17:44:19,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:19,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:19,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:44:19,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:44:19,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 17:44:19,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:19,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:19,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:19,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:19,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:19,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:19,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:44:19,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:19,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:19,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:19,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:19,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:19,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:19,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-14 17:44:19,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:19,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:19,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:19,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:19,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:19,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-14 17:44:19,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:44:19,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-14 17:44:19,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:19,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:19,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:44:19,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:19,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 17:44:19,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:19,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:44:19,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229125888] [2020-10-14 17:44:19,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:44:19,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 17:44:19,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424377205] [2020-10-14 17:44:19,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 17:44:19,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:19,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 17:44:19,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:44:19,635 INFO L87 Difference]: Start difference. First operand 110 states and 149 transitions. Second operand 6 states. [2020-10-14 17:44:19,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:19,879 INFO L93 Difference]: Finished difference Result 143 states and 194 transitions. [2020-10-14 17:44:19,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 17:44:19,879 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-14 17:44:19,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:19,883 INFO L225 Difference]: With dead ends: 143 [2020-10-14 17:44:19,883 INFO L226 Difference]: Without dead ends: 131 [2020-10-14 17:44:19,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-14 17:44:19,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-14 17:44:19,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 105. [2020-10-14 17:44:19,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-14 17:44:19,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 143 transitions. [2020-10-14 17:44:19,904 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 143 transitions. Word has length 27 [2020-10-14 17:44:19,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:19,905 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 143 transitions. [2020-10-14 17:44:19,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 17:44:19,905 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 143 transitions. [2020-10-14 17:44:19,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 17:44:19,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:19,906 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:19,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 17:44:19,906 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:19,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:19,907 INFO L82 PathProgramCache]: Analyzing trace with hash -921118929, now seen corresponding path program 2 times [2020-10-14 17:44:19,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:19,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752911382] [2020-10-14 17:44:19,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:19,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:19,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:19,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:19,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:20,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:20,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:20,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:20,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:21,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:21,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:22,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:22,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 17:44:22,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 17:44:22,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2387 [2020-10-14 17:44:22,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:22,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:22,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 17:44:22,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:44:22,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 17:44:22,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:22,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:22,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:22,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:22,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:22,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:22,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:44:22,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:22,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:22,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:22,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:22,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:22,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:22,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-14 17:44:22,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:22,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:22,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:22,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:22,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-14 17:44:22,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:44:22,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-14 17:44:22,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:22,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:22,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:44:22,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:22,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 17:44:22,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:22,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:44:22,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752911382] [2020-10-14 17:44:22,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:22,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 17:44:22,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457708402] [2020-10-14 17:44:22,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 17:44:22,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:22,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 17:44:22,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 17:44:22,611 INFO L87 Difference]: Start difference. First operand 105 states and 143 transitions. Second operand 7 states. [2020-10-14 17:44:23,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:23,138 INFO L93 Difference]: Finished difference Result 131 states and 177 transitions. [2020-10-14 17:44:23,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 17:44:23,139 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-14 17:44:23,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:23,140 INFO L225 Difference]: With dead ends: 131 [2020-10-14 17:44:23,140 INFO L226 Difference]: Without dead ends: 119 [2020-10-14 17:44:23,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:44:23,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-14 17:44:23,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 102. [2020-10-14 17:44:23,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-14 17:44:23,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 136 transitions. [2020-10-14 17:44:23,160 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 136 transitions. Word has length 29 [2020-10-14 17:44:23,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:23,160 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 136 transitions. [2020-10-14 17:44:23,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 17:44:23,160 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 136 transitions. [2020-10-14 17:44:23,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 17:44:23,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:23,162 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:23,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 17:44:23,162 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:23,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:23,162 INFO L82 PathProgramCache]: Analyzing trace with hash -2057609023, now seen corresponding path program 1 times [2020-10-14 17:44:23,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:23,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467754726] [2020-10-14 17:44:23,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:23,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:23,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:23,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:24,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:24,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 17:44:24,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:44:24,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 894 [2020-10-14 17:44:24,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:24,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:24,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:44:24,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:44:24,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 17:44:24,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:24,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:24,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:24,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:24,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:24,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:24,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:24,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:24,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:24,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:24,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:24,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:24,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:24,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-14 17:44:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:24,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:24,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:24,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:44:24,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:24,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-14 17:44:24,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:24,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:24,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 17:44:24,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:24,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 17:44:24,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:24,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 17:44:24,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467754726] [2020-10-14 17:44:24,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:24,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:44:24,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796473894] [2020-10-14 17:44:24,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:44:24,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:24,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:44:24,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:44:24,264 INFO L87 Difference]: Start difference. First operand 102 states and 136 transitions. Second operand 10 states. [2020-10-14 17:44:29,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:29,045 INFO L93 Difference]: Finished difference Result 215 states and 294 transitions. [2020-10-14 17:44:29,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 17:44:29,046 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-14 17:44:29,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:29,048 INFO L225 Difference]: With dead ends: 215 [2020-10-14 17:44:29,049 INFO L226 Difference]: Without dead ends: 194 [2020-10-14 17:44:29,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:44:29,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-14 17:44:29,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 106. [2020-10-14 17:44:29,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-14 17:44:29,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 142 transitions. [2020-10-14 17:44:29,072 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 142 transitions. Word has length 31 [2020-10-14 17:44:29,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:29,072 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 142 transitions. [2020-10-14 17:44:29,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:44:29,073 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 142 transitions. [2020-10-14 17:44:29,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 17:44:29,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:29,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:29,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 17:44:29,074 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:29,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:29,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1600492990, now seen corresponding path program 1 times [2020-10-14 17:44:29,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:29,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718066473] [2020-10-14 17:44:29,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:29,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:29,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:29,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 17:44:29,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:29,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-14 17:44:29,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:29,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:29,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:44:29,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 17:44:29,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 17:44:29,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:29,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:29,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:29,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:29,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:29,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:29,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:44:29,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:29,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:29,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:29,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:29,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:29,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:29,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-14 17:44:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:29,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:29,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:29,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-14 17:44:29,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:29,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 17:44:29,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:29,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:29,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:44:29,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-14 17:44:29,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 17:44:29,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:44:29,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718066473] [2020-10-14 17:44:29,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:44:29,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 17:44:29,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549872301] [2020-10-14 17:44:29,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 17:44:29,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:29,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 17:44:29,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 17:44:29,184 INFO L87 Difference]: Start difference. First operand 106 states and 142 transitions. Second operand 4 states. [2020-10-14 17:44:29,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:29,319 INFO L93 Difference]: Finished difference Result 132 states and 179 transitions. [2020-10-14 17:44:29,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 17:44:29,322 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-14 17:44:29,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:29,323 INFO L225 Difference]: With dead ends: 132 [2020-10-14 17:44:29,323 INFO L226 Difference]: Without dead ends: 109 [2020-10-14 17:44:29,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 17:44:29,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-14 17:44:29,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2020-10-14 17:44:29,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-14 17:44:29,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 143 transitions. [2020-10-14 17:44:29,340 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 143 transitions. Word has length 32 [2020-10-14 17:44:29,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:29,341 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 143 transitions. [2020-10-14 17:44:29,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 17:44:29,341 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 143 transitions. [2020-10-14 17:44:29,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 17:44:29,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:29,342 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:29,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 17:44:29,342 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:29,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:29,343 INFO L82 PathProgramCache]: Analyzing trace with hash 640546495, now seen corresponding path program 2 times [2020-10-14 17:44:29,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:29,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807877549] [2020-10-14 17:44:29,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:29,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:29,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:29,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:30,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:30,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 17:44:30,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:44:30,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 874 [2020-10-14 17:44:30,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:30,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:30,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 17:44:30,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:44:30,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 17:44:30,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:30,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:30,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:30,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:30,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:30,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:30,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:30,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:30,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:30,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:30,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:30,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:30,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:30,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-14 17:44:30,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:30,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:30,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:30,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:44:30,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:30,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-14 17:44:30,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:30,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:30,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 17:44:30,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:30,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 17:44:30,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 17:44:30,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807877549] [2020-10-14 17:44:30,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:30,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 17:44:30,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18586691] [2020-10-14 17:44:30,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 17:44:30,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:30,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 17:44:30,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:44:30,460 INFO L87 Difference]: Start difference. First operand 107 states and 143 transitions. Second operand 11 states. [2020-10-14 17:44:31,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:31,237 INFO L93 Difference]: Finished difference Result 264 states and 366 transitions. [2020-10-14 17:44:31,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 17:44:31,238 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-14 17:44:31,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:31,240 INFO L225 Difference]: With dead ends: 264 [2020-10-14 17:44:31,240 INFO L226 Difference]: Without dead ends: 243 [2020-10-14 17:44:31,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:44:31,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-14 17:44:31,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 111. [2020-10-14 17:44:31,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-14 17:44:31,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 149 transitions. [2020-10-14 17:44:31,262 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 149 transitions. Word has length 33 [2020-10-14 17:44:31,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:31,263 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 149 transitions. [2020-10-14 17:44:31,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 17:44:31,263 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 149 transitions. [2020-10-14 17:44:31,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 17:44:31,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:31,264 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:31,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 17:44:31,264 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:31,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:31,265 INFO L82 PathProgramCache]: Analyzing trace with hash -592247491, now seen corresponding path program 3 times [2020-10-14 17:44:31,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:31,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528161489] [2020-10-14 17:44:31,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:31,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:31,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:31,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:32,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:32,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 17:44:32,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:44:32,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1262 [2020-10-14 17:44:32,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:32,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:32,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:44:32,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:44:32,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 17:44:32,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:32,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:32,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:32,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:32,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:32,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:32,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:32,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:32,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:32,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:32,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:32,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:32,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:32,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-14 17:44:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:32,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:32,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:32,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:44:32,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:32,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-14 17:44:32,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:32,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:32,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 17:44:32,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:32,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 17:44:32,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:32,797 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 17:44:32,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528161489] [2020-10-14 17:44:32,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:32,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:44:32,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691053763] [2020-10-14 17:44:32,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:44:32,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:32,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:44:32,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:44:32,799 INFO L87 Difference]: Start difference. First operand 111 states and 149 transitions. Second operand 12 states. [2020-10-14 17:44:33,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:33,863 INFO L93 Difference]: Finished difference Result 312 states and 437 transitions. [2020-10-14 17:44:33,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 17:44:33,864 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-14 17:44:33,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:33,866 INFO L225 Difference]: With dead ends: 312 [2020-10-14 17:44:33,866 INFO L226 Difference]: Without dead ends: 291 [2020-10-14 17:44:33,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:44:33,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-14 17:44:33,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 115. [2020-10-14 17:44:33,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-14 17:44:33,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 155 transitions. [2020-10-14 17:44:33,884 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 155 transitions. Word has length 35 [2020-10-14 17:44:33,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:33,884 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 155 transitions. [2020-10-14 17:44:33,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:44:33,885 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 155 transitions. [2020-10-14 17:44:33,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 17:44:33,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:33,886 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:33,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 17:44:33,886 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:33,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:33,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1073105843, now seen corresponding path program 1 times [2020-10-14 17:44:33,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:33,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194154042] [2020-10-14 17:44:33,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:33,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:33,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:33,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:34,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:34,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:34,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:34,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:34,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:34,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:38,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:38,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 17:44:38,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 17:44:38,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4124 [2020-10-14 17:44:38,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:38,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:38,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 17:44:38,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:44:38,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 17:44:38,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:38,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:38,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:38,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:38,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:38,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:38,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:38,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:38,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:38,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:38,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:38,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:38,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:38,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:38,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-14 17:44:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:38,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:38,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:38,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-14 17:44:38,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:38,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 17:44:38,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:38,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:38,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:44:38,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:38,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 17:44:38,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:38,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-14 17:44:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:38,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:38,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:38,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:44:38,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:38,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 17:44:38,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:38,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:38,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:44:38,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:38,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:44:38,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 17:44:38,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194154042] [2020-10-14 17:44:38,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:38,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 17:44:38,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757915277] [2020-10-14 17:44:38,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 17:44:38,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:38,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 17:44:38,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 17:44:38,152 INFO L87 Difference]: Start difference. First operand 115 states and 155 transitions. Second operand 7 states. [2020-10-14 17:44:38,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:38,521 INFO L93 Difference]: Finished difference Result 188 states and 257 transitions. [2020-10-14 17:44:38,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 17:44:38,521 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-10-14 17:44:38,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:38,523 INFO L225 Difference]: With dead ends: 188 [2020-10-14 17:44:38,523 INFO L226 Difference]: Without dead ends: 148 [2020-10-14 17:44:38,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:44:38,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-14 17:44:38,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 121. [2020-10-14 17:44:38,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-14 17:44:38,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 166 transitions. [2020-10-14 17:44:38,540 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 166 transitions. Word has length 37 [2020-10-14 17:44:38,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:38,540 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 166 transitions. [2020-10-14 17:44:38,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 17:44:38,540 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 166 transitions. [2020-10-14 17:44:38,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 17:44:38,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:38,541 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:38,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 17:44:38,542 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:38,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:38,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1918489355, now seen corresponding path program 1 times [2020-10-14 17:44:38,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:38,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926922491] [2020-10-14 17:44:38,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:38,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:38,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:38,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:38,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:38,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:38,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:39,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:43,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:43,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 17:44:43,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:44:43,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:44:43,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:43,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:43,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:44:43,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:44:43,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 17:44:43,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:43,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:43,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:43,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:43,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:43,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:43,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:43,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 17:44:43,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:43,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:43,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:43,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:43,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:43,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:43,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-14 17:44:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:43,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:43,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:43,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:43,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-14 17:44:43,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:44:43,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-14 17:44:43,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:43,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:43,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 17:44:43,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 17:44:43,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 17:44:43,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:43,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 17:44:43,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926922491] [2020-10-14 17:44:43,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:43,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:44:43,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485630398] [2020-10-14 17:44:43,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:44:43,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:43,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:44:43,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:44:43,821 INFO L87 Difference]: Start difference. First operand 121 states and 166 transitions. Second operand 10 states. [2020-10-14 17:44:44,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:44,465 INFO L93 Difference]: Finished difference Result 205 states and 287 transitions. [2020-10-14 17:44:44,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 17:44:44,466 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-14 17:44:44,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:44,467 INFO L225 Difference]: With dead ends: 205 [2020-10-14 17:44:44,468 INFO L226 Difference]: Without dead ends: 162 [2020-10-14 17:44:44,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:44:44,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-14 17:44:44,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 131. [2020-10-14 17:44:44,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-14 17:44:44,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 178 transitions. [2020-10-14 17:44:44,483 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 178 transitions. Word has length 36 [2020-10-14 17:44:44,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:44,484 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 178 transitions. [2020-10-14 17:44:44,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:44:44,484 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 178 transitions. [2020-10-14 17:44:44,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 17:44:44,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:44,485 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:44,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 17:44:44,485 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:44,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:44,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1976319871, now seen corresponding path program 1 times [2020-10-14 17:44:44,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:44,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308083614] [2020-10-14 17:44:44,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:44,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:44,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:44,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 17:44:44,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:44,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-14 17:44:44,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:44,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:44,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 17:44:44,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-14 17:44:44,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 17:44:44,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:44,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:44,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:44,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:44,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:44,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:44,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:44,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:44,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:44,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:44,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:44,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:44,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:44,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:44,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-14 17:44:44,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:44,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:44,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:44,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-14 17:44:44,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:44,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 17:44:44,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:44,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:44,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:44,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:44,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:44,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 17:44:44,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308083614] [2020-10-14 17:44:44,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:44,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 17:44:44,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910727034] [2020-10-14 17:44:44,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 17:44:44,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:44,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 17:44:44,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 17:44:44,726 INFO L87 Difference]: Start difference. First operand 131 states and 178 transitions. Second operand 8 states. [2020-10-14 17:44:45,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:45,063 INFO L93 Difference]: Finished difference Result 176 states and 243 transitions. [2020-10-14 17:44:45,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 17:44:45,064 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-14 17:44:45,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:45,067 INFO L225 Difference]: With dead ends: 176 [2020-10-14 17:44:45,067 INFO L226 Difference]: Without dead ends: 167 [2020-10-14 17:44:45,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:44:45,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-14 17:44:45,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 155. [2020-10-14 17:44:45,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-14 17:44:45,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 216 transitions. [2020-10-14 17:44:45,092 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 216 transitions. Word has length 37 [2020-10-14 17:44:45,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:45,093 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 216 transitions. [2020-10-14 17:44:45,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 17:44:45,093 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 216 transitions. [2020-10-14 17:44:45,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 17:44:45,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:45,094 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:45,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 17:44:45,095 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:45,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:45,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1509300799, now seen corresponding path program 1 times [2020-10-14 17:44:45,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:45,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031268117] [2020-10-14 17:44:45,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:45,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:45,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:45,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:45,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 17:44:45,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:45,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 228 [2020-10-14 17:44:45,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:45,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:45,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:44:45,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-14 17:44:45,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 17:44:45,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:45,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:45,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:45,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:45,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:45,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:45,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:45,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:45,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:45,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:45,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:45,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:45,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:45,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:45,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-14 17:44:45,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:45,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:45,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:45,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-14 17:44:45,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:45,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-14 17:44:45,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:45,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:45,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 17:44:45,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:45,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 17:44:45,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:45,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-14 17:44:45,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031268117] [2020-10-14 17:44:45,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:45,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:44:45,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679643113] [2020-10-14 17:44:45,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:44:45,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:45,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:44:45,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:44:45,638 INFO L87 Difference]: Start difference. First operand 155 states and 216 transitions. Second operand 10 states. [2020-10-14 17:44:46,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:46,333 INFO L93 Difference]: Finished difference Result 253 states and 365 transitions. [2020-10-14 17:44:46,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 17:44:46,334 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-14 17:44:46,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:46,335 INFO L225 Difference]: With dead ends: 253 [2020-10-14 17:44:46,336 INFO L226 Difference]: Without dead ends: 222 [2020-10-14 17:44:46,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:44:46,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-14 17:44:46,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 172. [2020-10-14 17:44:46,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-14 17:44:46,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 241 transitions. [2020-10-14 17:44:46,361 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 241 transitions. Word has length 37 [2020-10-14 17:44:46,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:46,361 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 241 transitions. [2020-10-14 17:44:46,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:44:46,361 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 241 transitions. [2020-10-14 17:44:46,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 17:44:46,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:46,363 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:46,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 17:44:46,363 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:46,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:46,363 INFO L82 PathProgramCache]: Analyzing trace with hash 103705659, now seen corresponding path program 4 times [2020-10-14 17:44:46,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:46,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086410306] [2020-10-14 17:44:46,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:46,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:46,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:46,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:46,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:47,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:47,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 17:44:47,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:44:47,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1012 [2020-10-14 17:44:47,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:47,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:47,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 17:44:47,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:44:47,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 17:44:47,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:47,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:47,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:47,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:47,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:47,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:47,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:47,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:47,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:47,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:47,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:47,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:47,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:47,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:47,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-14 17:44:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:47,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:47,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:47,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:44:47,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:47,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 17:44:47,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:47,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:47,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 17:44:47,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:47,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 17:44:47,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:47,623 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 17:44:47,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086410306] [2020-10-14 17:44:47,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:47,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 17:44:47,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796565638] [2020-10-14 17:44:47,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 17:44:47,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:47,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 17:44:47,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:44:47,625 INFO L87 Difference]: Start difference. First operand 172 states and 241 transitions. Second operand 13 states. [2020-10-14 17:45:04,484 WARN L193 SmtUtils]: Spent 8.31 s on a formula simplification that was a NOOP. DAG size: 33 [2020-10-14 17:45:22,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:22,140 INFO L93 Difference]: Finished difference Result 515 states and 738 transitions. [2020-10-14 17:45:22,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 17:45:22,143 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-14 17:45:22,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:22,147 INFO L225 Difference]: With dead ends: 515 [2020-10-14 17:45:22,147 INFO L226 Difference]: Without dead ends: 475 [2020-10-14 17:45:22,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=72, Invalid=346, Unknown=2, NotChecked=0, Total=420 [2020-10-14 17:45:22,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-10-14 17:45:22,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 176. [2020-10-14 17:45:22,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-14 17:45:22,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 247 transitions. [2020-10-14 17:45:22,191 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 247 transitions. Word has length 37 [2020-10-14 17:45:22,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:22,191 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 247 transitions. [2020-10-14 17:45:22,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 17:45:22,192 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 247 transitions. [2020-10-14 17:45:22,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 17:45:22,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:22,194 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:22,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 17:45:22,194 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:22,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:22,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1976962163, now seen corresponding path program 2 times [2020-10-14 17:45:22,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:22,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942288233] [2020-10-14 17:45:22,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:22,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:22,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:22,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:22,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:22,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:22,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:22,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:22,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:26,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:26,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 17:45:26,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:45:26,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3958 [2020-10-14 17:45:26,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:26,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:26,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 17:45:26,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:45:26,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 17:45:26,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:26,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:26,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:26,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:26,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:26,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:26,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:26,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:45:26,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:26,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:26,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:26,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:26,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:26,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:26,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-14 17:45:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:26,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:26,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:26,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:26,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:26,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-14 17:45:26,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:45:26,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-14 17:45:26,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:26,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:26,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:45:26,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:26,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 17:45:26,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:45:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 17:45:26,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942288233] [2020-10-14 17:45:26,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:26,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 17:45:26,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364535284] [2020-10-14 17:45:26,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 17:45:26,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:26,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 17:45:26,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:45:26,389 INFO L87 Difference]: Start difference. First operand 176 states and 247 transitions. Second operand 9 states. [2020-10-14 17:45:27,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:27,004 INFO L93 Difference]: Finished difference Result 243 states and 339 transitions. [2020-10-14 17:45:27,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 17:45:27,005 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-10-14 17:45:27,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:27,007 INFO L225 Difference]: With dead ends: 243 [2020-10-14 17:45:27,007 INFO L226 Difference]: Without dead ends: 235 [2020-10-14 17:45:27,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:45:27,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-14 17:45:27,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 181. [2020-10-14 17:45:27,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-14 17:45:27,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 254 transitions. [2020-10-14 17:45:27,035 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 254 transitions. Word has length 38 [2020-10-14 17:45:27,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:27,036 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 254 transitions. [2020-10-14 17:45:27,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 17:45:27,036 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 254 transitions. [2020-10-14 17:45:27,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 17:45:27,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:27,038 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:27,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 17:45:27,038 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:27,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:27,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1100215367, now seen corresponding path program 5 times [2020-10-14 17:45:27,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:27,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878391959] [2020-10-14 17:45:27,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:27,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:27,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:27,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:27,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:27,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:27,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 17:45:27,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:45:27,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 752 [2020-10-14 17:45:27,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:27,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:27,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:45:27,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:45:27,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 17:45:27,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:27,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:27,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:27,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:27,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:27,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:27,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:45:27,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:27,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:27,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:27,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:27,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:27,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:27,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-14 17:45:27,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:27,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:27,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:27,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:45:27,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:27,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 17:45:27,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:27,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:27,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 17:45:27,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:27,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 17:45:27,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 17:45:28,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878391959] [2020-10-14 17:45:28,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:28,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:45:28,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018927218] [2020-10-14 17:45:28,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:45:28,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:28,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:45:28,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:45:28,060 INFO L87 Difference]: Start difference. First operand 181 states and 254 transitions. Second operand 14 states. [2020-10-14 17:45:29,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:29,552 INFO L93 Difference]: Finished difference Result 624 states and 897 transitions. [2020-10-14 17:45:29,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 17:45:29,553 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-14 17:45:29,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:29,556 INFO L225 Difference]: With dead ends: 624 [2020-10-14 17:45:29,556 INFO L226 Difference]: Without dead ends: 579 [2020-10-14 17:45:29,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:45:29,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2020-10-14 17:45:29,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 185. [2020-10-14 17:45:29,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-14 17:45:29,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 260 transitions. [2020-10-14 17:45:29,584 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 260 transitions. Word has length 39 [2020-10-14 17:45:29,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:29,584 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 260 transitions. [2020-10-14 17:45:29,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:45:29,585 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 260 transitions. [2020-10-14 17:45:29,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 17:45:29,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:29,587 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:29,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 17:45:29,587 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:29,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:29,588 INFO L82 PathProgramCache]: Analyzing trace with hash 362750054, now seen corresponding path program 1 times [2020-10-14 17:45:29,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:29,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288387674] [2020-10-14 17:45:29,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:29,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:29,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:29,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:29,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:29,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:30,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:30,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:30,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:34,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:34,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 17:45:34,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:45:34,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:45:34,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:34,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:34,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:45:34,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:45:34,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 17:45:34,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:45:34,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:34,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:34,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:34,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:34,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:34,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:45:34,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:34,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:34,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:34,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:34,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:34,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:34,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-14 17:45:34,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:34,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:34,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:34,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:34,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:34,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:34,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 17:45:34,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:45:34,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-14 17:45:34,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:34,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:34,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 17:45:34,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:34,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 17:45:34,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:45:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 17:45:35,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288387674] [2020-10-14 17:45:35,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:35,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:45:35,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570572188] [2020-10-14 17:45:35,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:45:35,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:35,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:45:35,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:45:35,134 INFO L87 Difference]: Start difference. First operand 185 states and 260 transitions. Second operand 12 states. [2020-10-14 17:45:36,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:36,202 INFO L93 Difference]: Finished difference Result 401 states and 591 transitions. [2020-10-14 17:45:36,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 17:45:36,207 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-14 17:45:36,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:36,209 INFO L225 Difference]: With dead ends: 401 [2020-10-14 17:45:36,209 INFO L226 Difference]: Without dead ends: 357 [2020-10-14 17:45:36,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:45:36,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-10-14 17:45:36,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 219. [2020-10-14 17:45:36,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-14 17:45:36,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 319 transitions. [2020-10-14 17:45:36,234 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 319 transitions. Word has length 40 [2020-10-14 17:45:36,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:36,234 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 319 transitions. [2020-10-14 17:45:36,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:45:36,235 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 319 transitions. [2020-10-14 17:45:36,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 17:45:36,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:36,236 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:36,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 17:45:36,237 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:36,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:36,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1679519854, now seen corresponding path program 2 times [2020-10-14 17:45:36,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:36,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785826280] [2020-10-14 17:45:36,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:36,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:36,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:36,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:36,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:36,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:36,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:36,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:36,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:36,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:41,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:41,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 17:45:41,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 17:45:41,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:45:41,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:41,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:41,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:45:41,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:45:41,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 17:45:41,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:41,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:41,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:41,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:41,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:41,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:41,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:45:41,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:41,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:41,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:41,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:41,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:41,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:41,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-14 17:45:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:41,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:41,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:41,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:41,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-14 17:45:41,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:45:41,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-14 17:45:41,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:41,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:41,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:45:41,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:41,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 17:45:41,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:41,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 17:45:41,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785826280] [2020-10-14 17:45:41,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:41,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:45:41,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980575918] [2020-10-14 17:45:41,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:45:41,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:41,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:45:41,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:45:41,452 INFO L87 Difference]: Start difference. First operand 219 states and 319 transitions. Second operand 10 states. [2020-10-14 17:45:42,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:42,328 INFO L93 Difference]: Finished difference Result 377 states and 542 transitions. [2020-10-14 17:45:42,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 17:45:42,329 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-14 17:45:42,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:42,331 INFO L225 Difference]: With dead ends: 377 [2020-10-14 17:45:42,331 INFO L226 Difference]: Without dead ends: 354 [2020-10-14 17:45:42,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:45:42,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-10-14 17:45:42,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 223. [2020-10-14 17:45:42,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-14 17:45:42,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 320 transitions. [2020-10-14 17:45:42,367 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 320 transitions. Word has length 40 [2020-10-14 17:45:42,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:42,367 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 320 transitions. [2020-10-14 17:45:42,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:45:42,367 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 320 transitions. [2020-10-14 17:45:42,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 17:45:42,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:42,369 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:42,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 17:45:42,369 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:42,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:42,369 INFO L82 PathProgramCache]: Analyzing trace with hash -273284892, now seen corresponding path program 1 times [2020-10-14 17:45:42,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:42,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689795892] [2020-10-14 17:45:42,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:42,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:42,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:42,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:42,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:42,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:42,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:43,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:47,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:47,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 17:45:47,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:45:47,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 17:45:47,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:47,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:47,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 17:45:47,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:45:47,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 17:45:47,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:47,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:47,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:47,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:47,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:47,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:47,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:45:47,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:47,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:47,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:47,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:47,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:47,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:47,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-14 17:45:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:47,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:47,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:47,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-14 17:45:47,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:47,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 17:45:47,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:47,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:47,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:45:47,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:47,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 17:45:47,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:47,527 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-14 17:45:47,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689795892] [2020-10-14 17:45:47,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:47,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 17:45:47,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349971332] [2020-10-14 17:45:47,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 17:45:47,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:47,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 17:45:47,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:45:47,529 INFO L87 Difference]: Start difference. First operand 223 states and 320 transitions. Second operand 9 states. [2020-10-14 17:45:48,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:48,195 INFO L93 Difference]: Finished difference Result 350 states and 494 transitions. [2020-10-14 17:45:48,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 17:45:48,195 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-10-14 17:45:48,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:48,198 INFO L225 Difference]: With dead ends: 350 [2020-10-14 17:45:48,198 INFO L226 Difference]: Without dead ends: 317 [2020-10-14 17:45:48,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:45:48,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-10-14 17:45:48,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 222. [2020-10-14 17:45:48,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-14 17:45:48,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 316 transitions. [2020-10-14 17:45:48,232 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 316 transitions. Word has length 41 [2020-10-14 17:45:48,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:48,232 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 316 transitions. [2020-10-14 17:45:48,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 17:45:48,233 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 316 transitions. [2020-10-14 17:45:48,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 17:45:48,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:48,234 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:48,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 17:45:48,235 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:48,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:48,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1572848567, now seen corresponding path program 6 times [2020-10-14 17:45:48,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:48,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538641679] [2020-10-14 17:45:48,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:48,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:48,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:48,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:48,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:49,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:49,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 17:45:49,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:45:49,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 831 [2020-10-14 17:45:49,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:49,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:49,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 17:45:49,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:45:49,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 17:45:49,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:49,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:49,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:49,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:49,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:49,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:49,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:49,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:45:49,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:49,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:49,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:49,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:49,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:49,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:45:49,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-14 17:45:49,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:49,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:49,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:49,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:45:49,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:49,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-14 17:45:49,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:49,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:49,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 17:45:49,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:49,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 17:45:49,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:45:49,485 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 17:45:49,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538641679] [2020-10-14 17:45:49,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:49,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 17:45:49,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973628894] [2020-10-14 17:45:49,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 17:45:49,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:49,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 17:45:49,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:45:49,488 INFO L87 Difference]: Start difference. First operand 222 states and 316 transitions. Second operand 15 states. [2020-10-14 17:45:52,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:52,072 INFO L93 Difference]: Finished difference Result 869 states and 1258 transitions. [2020-10-14 17:45:52,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 17:45:52,074 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-14 17:45:52,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:52,080 INFO L225 Difference]: With dead ends: 869 [2020-10-14 17:45:52,080 INFO L226 Difference]: Without dead ends: 816 [2020-10-14 17:45:52,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2020-10-14 17:45:52,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2020-10-14 17:45:52,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 228. [2020-10-14 17:45:52,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-14 17:45:52,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 325 transitions. [2020-10-14 17:45:52,128 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 325 transitions. Word has length 41 [2020-10-14 17:45:52,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:52,129 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 325 transitions. [2020-10-14 17:45:52,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 17:45:52,129 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 325 transitions. [2020-10-14 17:45:52,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 17:45:52,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:52,130 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:52,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 17:45:52,131 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:52,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:52,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1886965784, now seen corresponding path program 2 times [2020-10-14 17:45:52,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:52,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650781949] [2020-10-14 17:45:52,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:52,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:52,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:52,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:52,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:52,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:52,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:52,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:52,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:53,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:54,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:54,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:57,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:57,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 17:45:57,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 17:45:57,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 17:45:57,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:57,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:57,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 17:45:57,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:45:57,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 17:45:57,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:45:57,550 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 20 [2020-10-14 17:45:57,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:57,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:57,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:57,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:57,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:57,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:45:57,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:57,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:57,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:57,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:57,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:57,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:45:57,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-14 17:45:57,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:57,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:57,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:57,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:57,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:57,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 17:45:57,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:45:57,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-10-14 17:45:57,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:57,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:57,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:45:57,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:57,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 17:45:57,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:45:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 17:45:57,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650781949] [2020-10-14 17:45:57,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:57,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 17:45:57,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454307993] [2020-10-14 17:45:57,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 17:45:57,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:57,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 17:45:57,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:45:57,853 INFO L87 Difference]: Start difference. First operand 228 states and 325 transitions. Second operand 9 states. [2020-10-14 17:45:59,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:59,301 INFO L93 Difference]: Finished difference Result 309 states and 437 transitions. [2020-10-14 17:45:59,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 17:45:59,301 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-14 17:45:59,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:59,303 INFO L225 Difference]: With dead ends: 309 [2020-10-14 17:45:59,303 INFO L226 Difference]: Without dead ends: 301 [2020-10-14 17:45:59,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:45:59,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-10-14 17:45:59,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 231. [2020-10-14 17:45:59,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-14 17:45:59,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 328 transitions. [2020-10-14 17:45:59,344 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 328 transitions. Word has length 42 [2020-10-14 17:45:59,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:59,344 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 328 transitions. [2020-10-14 17:45:59,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 17:45:59,344 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 328 transitions. [2020-10-14 17:45:59,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 17:45:59,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:59,346 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:59,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 17:45:59,346 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:59,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:59,347 INFO L82 PathProgramCache]: Analyzing trace with hash -570195984, now seen corresponding path program 3 times [2020-10-14 17:45:59,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:59,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401822802] [2020-10-14 17:45:59,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:59,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:59,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:59,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:59,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:59,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:59,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:59,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:59,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:59,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:59,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:00,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:00,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:04,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:04,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 17:46:04,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 17:46:04,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 17:46:04,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:04,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:04,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 17:46:04,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 17:46:04,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 17:46:04,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:04,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:46:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:04,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:04,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:04,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:46:04,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:04,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:46:04,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:04,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:04,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:46:04,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:04,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:46:04,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:04,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-14 17:46:04,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:04,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:04,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:04,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:04,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-14 17:46:04,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:46:04,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-14 17:46:04,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:04,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:04,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:46:04,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:04,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 17:46:04,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:04,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-14 17:46:04,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401822802] [2020-10-14 17:46:04,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:46:04,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 17:46:04,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778872252] [2020-10-14 17:46:04,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 17:46:04,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:46:04,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 17:46:04,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 17:46:04,504 INFO L87 Difference]: Start difference. First operand 231 states and 328 transitions. Second operand 8 states. [2020-10-14 17:46:04,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:46:04,996 INFO L93 Difference]: Finished difference Result 260 states and 362 transitions. [2020-10-14 17:46:04,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 17:46:04,997 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-10-14 17:46:04,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:46:05,000 INFO L225 Difference]: With dead ends: 260 [2020-10-14 17:46:05,000 INFO L226 Difference]: Without dead ends: 230 [2020-10-14 17:46:05,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:46:05,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-14 17:46:05,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2020-10-14 17:46:05,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-14 17:46:05,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 322 transitions. [2020-10-14 17:46:05,049 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 322 transitions. Word has length 42 [2020-10-14 17:46:05,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:46:05,049 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 322 transitions. [2020-10-14 17:46:05,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 17:46:05,049 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 322 transitions. [2020-10-14 17:46:05,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 17:46:05,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:46:05,055 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:46:05,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 17:46:05,055 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:46:05,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:46:05,055 INFO L82 PathProgramCache]: Analyzing trace with hash 757899618, now seen corresponding path program 2 times [2020-10-14 17:46:05,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:46:05,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220516131] [2020-10-14 17:46:05,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:46:05,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:05,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:05,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:05,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 17:46:05,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:05,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-14 17:46:05,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:05,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:05,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:46:05,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 17:46:05,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 17:46:05,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:05,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:46:05,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:05,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:05,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:05,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:46:05,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:05,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:46:05,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:05,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:05,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:46:05,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:05,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:46:05,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:05,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-14 17:46:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:05,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:05,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:05,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-14 17:46:05,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:05,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-14 17:46:05,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:05,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:05,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:46:05,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:05,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 17:46:05,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:05,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-14 17:46:05,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220516131] [2020-10-14 17:46:05,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:46:05,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:46:05,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455165932] [2020-10-14 17:46:05,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:46:05,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:46:05,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:46:05,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:46:05,815 INFO L87 Difference]: Start difference. First operand 230 states and 322 transitions. Second operand 14 states. [2020-10-14 17:46:06,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:46:06,915 INFO L93 Difference]: Finished difference Result 365 states and 517 transitions. [2020-10-14 17:46:06,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 17:46:06,916 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2020-10-14 17:46:06,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:46:06,918 INFO L225 Difference]: With dead ends: 365 [2020-10-14 17:46:06,918 INFO L226 Difference]: Without dead ends: 272 [2020-10-14 17:46:06,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2020-10-14 17:46:06,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-14 17:46:06,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 248. [2020-10-14 17:46:06,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-14 17:46:06,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 344 transitions. [2020-10-14 17:46:06,973 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 344 transitions. Word has length 43 [2020-10-14 17:46:06,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:46:06,974 INFO L479 AbstractCegarLoop]: Abstraction has 248 states and 344 transitions. [2020-10-14 17:46:06,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:46:06,974 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 344 transitions. [2020-10-14 17:46:06,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 17:46:06,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:46:06,976 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:46:06,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 17:46:06,976 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:46:06,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:46:06,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1221885174, now seen corresponding path program 1 times [2020-10-14 17:46:06,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:46:06,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563959242] [2020-10-14 17:46:06,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:46:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:06,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:06,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:07,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:07,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:07,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:07,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:07,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:07,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:07,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:07,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:07,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:07,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:07,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:07,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:07,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:08,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:08,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:08,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:08,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:08,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:08,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:08,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:08,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:08,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:08,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:09,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:09,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:09,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:09,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:09,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:09,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:11,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:11,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:11,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 17:46:11,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 32 [2020-10-14 17:46:11,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:46:11,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:11,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:11,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 17:46:11,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:46:11,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 17:46:11,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:46:12,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:46:12,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:12,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:12,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:12,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:46:12,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:12,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:46:12,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:12,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:12,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:46:12,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:12,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:46:12,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:12,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-14 17:46:12,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:12,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:12,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:12,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:12,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-14 17:46:12,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:46:12,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-14 17:46:12,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:12,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:12,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:46:12,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:12,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 17:46:12,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:12,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-14 17:46:12,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:12,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:12,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:12,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:46:12,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:12,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:46:12,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:12,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:12,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:46:12,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:12,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:46:12,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:12,093 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-14 17:46:12,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563959242] [2020-10-14 17:46:12,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:46:12,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 17:46:12,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54761214] [2020-10-14 17:46:12,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 17:46:12,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:46:12,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 17:46:12,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 17:46:12,095 INFO L87 Difference]: Start difference. First operand 248 states and 344 transitions. Second operand 7 states. [2020-10-14 17:46:12,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:46:12,494 INFO L93 Difference]: Finished difference Result 307 states and 424 transitions. [2020-10-14 17:46:12,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 17:46:12,494 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-10-14 17:46:12,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:46:12,496 INFO L225 Difference]: With dead ends: 307 [2020-10-14 17:46:12,496 INFO L226 Difference]: Without dead ends: 267 [2020-10-14 17:46:12,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:46:12,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-14 17:46:12,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 247. [2020-10-14 17:46:12,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-14 17:46:12,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 335 transitions. [2020-10-14 17:46:12,537 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 335 transitions. Word has length 44 [2020-10-14 17:46:12,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:46:12,538 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 335 transitions. [2020-10-14 17:46:12,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 17:46:12,538 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 335 transitions. [2020-10-14 17:46:12,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 17:46:12,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:46:12,539 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:46:12,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 17:46:12,539 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:46:12,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:46:12,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1996846133, now seen corresponding path program 7 times [2020-10-14 17:46:12,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:46:12,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550519443] [2020-10-14 17:46:12,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:46:12,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:12,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:12,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:12,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:13,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:13,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 17:46:13,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:46:13,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 865 [2020-10-14 17:46:13,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:13,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:13,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:46:13,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:46:13,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 17:46:13,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:13,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:46:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:13,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:13,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:13,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:46:13,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:13,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:46:13,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:13,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:13,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:46:13,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:13,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:46:13,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:13,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-14 17:46:13,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:13,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:13,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:13,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:46:13,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:13,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 17:46:13,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:13,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:13,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 17:46:13,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:13,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 17:46:13,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:13,744 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 17:46:13,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550519443] [2020-10-14 17:46:13,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:46:13,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:46:13,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130036467] [2020-10-14 17:46:13,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:46:13,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:46:13,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:46:13,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:46:13,746 INFO L87 Difference]: Start difference. First operand 247 states and 335 transitions. Second operand 16 states. [2020-10-14 17:46:15,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:46:15,772 INFO L93 Difference]: Finished difference Result 1085 states and 1514 transitions. [2020-10-14 17:46:15,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 17:46:15,773 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-14 17:46:15,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:46:15,778 INFO L225 Difference]: With dead ends: 1085 [2020-10-14 17:46:15,779 INFO L226 Difference]: Without dead ends: 1031 [2020-10-14 17:46:15,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:46:15,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2020-10-14 17:46:15,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 253. [2020-10-14 17:46:15,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-14 17:46:15,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 343 transitions. [2020-10-14 17:46:15,832 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 343 transitions. Word has length 43 [2020-10-14 17:46:15,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:46:15,832 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 343 transitions. [2020-10-14 17:46:15,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:46:15,832 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 343 transitions. [2020-10-14 17:46:15,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 17:46:15,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:46:15,833 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:46:15,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 17:46:15,834 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:46:15,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:46:15,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1766981426, now seen corresponding path program 4 times [2020-10-14 17:46:15,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:46:15,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712904773] [2020-10-14 17:46:15,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:46:15,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:15,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:15,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:16,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:16,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:16,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:16,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:16,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:16,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:16,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:16,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:17,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:17,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:17,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:20,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:20,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:20,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 17:46:20,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 17:46:20,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-14 17:46:20,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:20,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:20,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 17:46:20,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:46:20,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 17:46:20,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:20,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:46:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:20,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:20,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:20,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:46:20,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:20,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:46:20,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:20,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:20,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:46:20,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:20,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:46:20,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:20,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-14 17:46:20,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:20,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:21,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:21,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-14 17:46:21,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:21,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-14 17:46:21,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:21,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:21,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 17:46:21,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 17:46:21,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 17:46:21,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:21,217 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 17:46:21,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712904773] [2020-10-14 17:46:21,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:46:21,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 17:46:21,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427108769] [2020-10-14 17:46:21,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 17:46:21,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:46:21,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 17:46:21,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:46:21,219 INFO L87 Difference]: Start difference. First operand 253 states and 343 transitions. Second operand 11 states. [2020-10-14 17:46:24,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:46:24,295 INFO L93 Difference]: Finished difference Result 347 states and 469 transitions. [2020-10-14 17:46:24,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 17:46:24,296 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-14 17:46:24,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:46:24,298 INFO L225 Difference]: With dead ends: 347 [2020-10-14 17:46:24,298 INFO L226 Difference]: Without dead ends: 299 [2020-10-14 17:46:24,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:46:24,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-14 17:46:24,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 252. [2020-10-14 17:46:24,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-14 17:46:24,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 339 transitions. [2020-10-14 17:46:24,346 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 339 transitions. Word has length 44 [2020-10-14 17:46:24,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:46:24,347 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 339 transitions. [2020-10-14 17:46:24,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 17:46:24,347 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 339 transitions. [2020-10-14 17:46:24,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 17:46:24,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:46:24,349 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:46:24,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 17:46:24,349 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:46:24,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:46:24,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1049443872, now seen corresponding path program 1 times [2020-10-14 17:46:24,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:46:24,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803599066] [2020-10-14 17:46:24,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:46:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:24,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:24,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:24,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 17:46:24,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:24,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-10-14 17:46:24,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:24,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:24,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 17:46:24,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-14 17:46:24,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 17:46:24,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:24,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:46:24,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:24,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:24,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:24,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:46:24,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:24,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:46:24,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:24,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:24,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:46:24,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:24,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:46:24,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:24,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-14 17:46:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:24,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:24,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:24,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-14 17:46:24,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:24,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 17:46:24,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:24,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:24,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:46:24,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:24,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:46:24,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:24,755 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 17:46:24,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803599066] [2020-10-14 17:46:24,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:46:24,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 17:46:24,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555247994] [2020-10-14 17:46:24,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 17:46:24,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:46:24,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 17:46:24,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:46:24,757 INFO L87 Difference]: Start difference. First operand 252 states and 339 transitions. Second operand 9 states. [2020-10-14 17:46:25,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:46:25,124 INFO L93 Difference]: Finished difference Result 281 states and 377 transitions. [2020-10-14 17:46:25,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 17:46:25,130 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-10-14 17:46:25,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:46:25,131 INFO L225 Difference]: With dead ends: 281 [2020-10-14 17:46:25,132 INFO L226 Difference]: Without dead ends: 272 [2020-10-14 17:46:25,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:46:25,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-14 17:46:25,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 261. [2020-10-14 17:46:25,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-14 17:46:25,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 351 transitions. [2020-10-14 17:46:25,181 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 351 transitions. Word has length 45 [2020-10-14 17:46:25,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:46:25,181 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 351 transitions. [2020-10-14 17:46:25,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 17:46:25,181 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 351 transitions. [2020-10-14 17:46:25,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 17:46:25,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:46:25,182 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:46:25,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 17:46:25,183 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:46:25,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:46:25,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1248975114, now seen corresponding path program 1 times [2020-10-14 17:46:25,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:46:25,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632306083] [2020-10-14 17:46:25,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:46:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:25,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:25,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:25,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:25,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:25,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:25,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:25,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:25,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:25,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:25,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:25,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:25,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:25,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:25,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:25,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:25,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:25,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:26,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:26,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:26,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:27,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:27,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:28,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:28,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:28,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:28,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:28,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:28,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:28,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:28,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:29,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:29,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:29,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:29,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:29,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:29,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:29,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:29,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:29,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:29,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:29,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:29,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:30,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:30,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 17:46:30,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 42 [2020-10-14 17:46:30,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:46:30,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:30,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:30,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 17:46:30,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 17:46:30,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 17:46:30,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:46:30,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:46:30,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:30,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:30,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:30,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:46:30,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:30,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:46:30,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:30,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:30,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:46:30,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:30,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:46:30,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:30,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-14 17:46:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:30,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:30,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:30,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-14 17:46:30,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:30,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 17:46:30,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:30,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:30,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:46:30,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:30,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 17:46:30,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:30,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-14 17:46:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:30,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:30,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:30,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:46:30,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:30,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:46:30,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:30,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:30,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:46:30,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:30,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:46:30,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:46:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 17:46:30,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632306083] [2020-10-14 17:46:30,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:46:30,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 17:46:30,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830980275] [2020-10-14 17:46:30,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 17:46:30,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:46:30,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 17:46:30,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 17:46:30,312 INFO L87 Difference]: Start difference. First operand 261 states and 351 transitions. Second operand 7 states. [2020-10-14 17:46:30,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:46:30,750 INFO L93 Difference]: Finished difference Result 303 states and 407 transitions. [2020-10-14 17:46:30,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 17:46:30,751 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2020-10-14 17:46:30,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:46:30,752 INFO L225 Difference]: With dead ends: 303 [2020-10-14 17:46:30,753 INFO L226 Difference]: Without dead ends: 280 [2020-10-14 17:46:30,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:46:30,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-14 17:46:30,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 265. [2020-10-14 17:46:30,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-14 17:46:30,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 355 transitions. [2020-10-14 17:46:30,811 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 355 transitions. Word has length 46 [2020-10-14 17:46:30,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:46:30,811 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 355 transitions. [2020-10-14 17:46:30,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 17:46:30,811 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 355 transitions. [2020-10-14 17:46:30,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 17:46:30,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:46:30,813 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:46:30,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 17:46:30,813 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:46:30,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:46:30,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1436613939, now seen corresponding path program 8 times [2020-10-14 17:46:30,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:46:30,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129561867] [2020-10-14 17:46:30,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:46:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:30,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:30,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:31,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:31,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:31,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 17:46:31,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:46:31,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1130 [2020-10-14 17:46:31,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:31,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:31,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 17:46:31,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:46:31,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 17:46:31,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:32,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:46:32,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:32,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:32,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:32,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:46:32,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:32,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:46:32,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:32,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:32,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:46:32,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:32,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:46:32,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:32,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-14 17:46:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:32,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:32,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:32,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:46:32,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:32,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 17:46:32,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:32,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:32,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 17:46:32,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:32,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 17:46:32,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:32,324 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 17:46:32,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129561867] [2020-10-14 17:46:32,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:46:32,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 17:46:32,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536199355] [2020-10-14 17:46:32,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 17:46:32,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:46:32,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 17:46:32,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:46:32,326 INFO L87 Difference]: Start difference. First operand 265 states and 355 transitions. Second operand 17 states. [2020-10-14 17:46:34,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:46:34,709 INFO L93 Difference]: Finished difference Result 1324 states and 1821 transitions. [2020-10-14 17:46:34,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 17:46:34,710 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-10-14 17:46:34,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:46:34,716 INFO L225 Difference]: With dead ends: 1324 [2020-10-14 17:46:34,716 INFO L226 Difference]: Without dead ends: 1264 [2020-10-14 17:46:34,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2020-10-14 17:46:34,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2020-10-14 17:46:34,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 271. [2020-10-14 17:46:34,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-14 17:46:34,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 363 transitions. [2020-10-14 17:46:34,780 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 363 transitions. Word has length 45 [2020-10-14 17:46:34,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:46:34,780 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 363 transitions. [2020-10-14 17:46:34,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 17:46:34,780 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 363 transitions. [2020-10-14 17:46:34,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 17:46:34,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:46:34,782 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:46:34,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 17:46:34,782 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:46:34,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:46:34,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1789902259, now seen corresponding path program 1 times [2020-10-14 17:46:34,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:46:34,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860610595] [2020-10-14 17:46:34,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:46:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:34,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:34,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:35,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:35,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:35,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:35,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:36,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:39,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:39,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 17:46:39,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:46:39,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 17:46:39,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:39,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:39,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:46:39,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 17:46:39,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 17:46:39,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:39,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:46:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:39,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:39,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:39,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:46:39,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:39,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:46:39,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:39,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:39,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:46:39,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:39,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:46:39,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:39,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-14 17:46:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:39,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:39,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:39,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 17:46:39,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:39,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-14 17:46:39,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:39,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:39,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 17:46:39,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:39,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 17:46:39,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:40,060 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-14 17:46:40,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860610595] [2020-10-14 17:46:40,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:46:40,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:46:40,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270677196] [2020-10-14 17:46:40,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:46:40,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:46:40,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:46:40,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:46:40,061 INFO L87 Difference]: Start difference. First operand 271 states and 363 transitions. Second operand 10 states. [2020-10-14 17:46:40,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:46:40,766 INFO L93 Difference]: Finished difference Result 404 states and 552 transitions. [2020-10-14 17:46:40,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 17:46:40,767 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-10-14 17:46:40,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:46:40,769 INFO L225 Difference]: With dead ends: 404 [2020-10-14 17:46:40,769 INFO L226 Difference]: Without dead ends: 357 [2020-10-14 17:46:40,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:46:40,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-10-14 17:46:40,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 275. [2020-10-14 17:46:40,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-14 17:46:40,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 365 transitions. [2020-10-14 17:46:40,827 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 365 transitions. Word has length 46 [2020-10-14 17:46:40,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:46:40,827 INFO L479 AbstractCegarLoop]: Abstraction has 275 states and 365 transitions. [2020-10-14 17:46:40,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:46:40,827 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 365 transitions. [2020-10-14 17:46:40,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 17:46:40,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:46:40,829 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:46:40,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 17:46:40,829 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:46:40,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:46:40,830 INFO L82 PathProgramCache]: Analyzing trace with hash -279491055, now seen corresponding path program 2 times [2020-10-14 17:46:40,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:46:40,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700623801] [2020-10-14 17:46:40,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:46:40,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:40,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:40,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:41,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:41,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:41,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:41,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:45,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:45,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 17:46:45,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:46:45,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:46:45,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:45,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:45,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:46:45,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 17:46:45,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 17:46:45,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:46,055 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 28 [2020-10-14 17:46:46,230 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 28 [2020-10-14 17:46:46,412 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 28 [2020-10-14 17:46:46,603 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 27 [2020-10-14 17:46:46,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:46:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:46,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:46,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:46,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:46:46,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:46,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:46:46,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:46,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:46,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:46:46,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:46,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:46:46,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:46,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-14 17:46:46,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:46,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:46,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:46,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:46,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 17:46:46,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:46:46,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-14 17:46:46,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:46,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:46,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 17:46:46,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:46,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 17:46:46,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:47,026 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-14 17:46:47,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700623801] [2020-10-14 17:46:47,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:46:47,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:46:47,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703434133] [2020-10-14 17:46:47,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:46:47,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:46:47,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:46:47,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:46:47,027 INFO L87 Difference]: Start difference. First operand 275 states and 365 transitions. Second operand 12 states. [2020-10-14 17:46:50,265 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2020-10-14 17:46:50,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:46:50,559 INFO L93 Difference]: Finished difference Result 456 states and 624 transitions. [2020-10-14 17:46:50,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 17:46:50,560 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-14 17:46:50,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:46:50,563 INFO L225 Difference]: With dead ends: 456 [2020-10-14 17:46:50,563 INFO L226 Difference]: Without dead ends: 446 [2020-10-14 17:46:50,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:46:50,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-14 17:46:50,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 299. [2020-10-14 17:46:50,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-10-14 17:46:50,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 397 transitions. [2020-10-14 17:46:50,634 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 397 transitions. Word has length 46 [2020-10-14 17:46:50,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:46:50,635 INFO L479 AbstractCegarLoop]: Abstraction has 299 states and 397 transitions. [2020-10-14 17:46:50,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:46:50,635 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 397 transitions. [2020-10-14 17:46:50,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 17:46:50,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:46:50,637 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:46:50,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 17:46:50,637 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:46:50,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:46:50,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1075441379, now seen corresponding path program 3 times [2020-10-14 17:46:50,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:46:50,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384152172] [2020-10-14 17:46:50,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:46:50,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:50,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:50,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:50,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 17:46:50,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:50,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 313 [2020-10-14 17:46:50,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:50,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:50,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:46:50,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-14 17:46:50,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 17:46:50,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:51,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:46:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:51,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:51,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:51,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:46:51,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:51,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:46:51,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:51,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:51,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:46:51,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:51,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:46:51,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:51,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-14 17:46:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:51,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:51,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:51,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 17:46:51,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:51,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-14 17:46:51,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:51,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:51,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 17:46:51,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:51,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 17:46:51,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:51,350 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-14 17:46:51,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384152172] [2020-10-14 17:46:51,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:46:51,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:46:51,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723152034] [2020-10-14 17:46:51,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:46:51,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:46:51,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:46:51,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:46:51,352 INFO L87 Difference]: Start difference. First operand 299 states and 397 transitions. Second operand 12 states. [2020-10-14 17:46:52,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:46:52,287 INFO L93 Difference]: Finished difference Result 468 states and 635 transitions. [2020-10-14 17:46:52,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 17:46:52,288 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-14 17:46:52,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:46:52,290 INFO L225 Difference]: With dead ends: 468 [2020-10-14 17:46:52,290 INFO L226 Difference]: Without dead ends: 410 [2020-10-14 17:46:52,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:46:52,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-10-14 17:46:52,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 318. [2020-10-14 17:46:52,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-14 17:46:52,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 421 transitions. [2020-10-14 17:46:52,364 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 421 transitions. Word has length 47 [2020-10-14 17:46:52,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:46:52,364 INFO L479 AbstractCegarLoop]: Abstraction has 318 states and 421 transitions. [2020-10-14 17:46:52,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:46:52,365 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 421 transitions. [2020-10-14 17:46:52,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 17:46:52,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:46:52,366 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:46:52,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 17:46:52,367 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:46:52,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:46:52,367 INFO L82 PathProgramCache]: Analyzing trace with hash -75612495, now seen corresponding path program 9 times [2020-10-14 17:46:52,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:46:52,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853829874] [2020-10-14 17:46:52,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:46:52,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:52,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:52,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:52,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:54,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:54,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 17:46:54,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:46:54,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1633 [2020-10-14 17:46:54,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:54,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:54,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 17:46:54,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:46:54,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 17:46:54,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:54,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:46:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:54,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:54,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:54,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:46:54,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:54,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:46:54,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:54,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:54,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:46:54,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:54,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:46:54,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:54,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-14 17:46:54,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:54,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:54,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:54,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:46:54,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:54,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 17:46:54,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:54,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:54,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 17:46:54,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:54,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 17:46:54,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:46:54,620 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 17:46:54,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853829874] [2020-10-14 17:46:54,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:46:54,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 17:46:54,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021798096] [2020-10-14 17:46:54,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 17:46:54,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:46:54,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 17:46:54,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:46:54,623 INFO L87 Difference]: Start difference. First operand 318 states and 421 transitions. Second operand 18 states. [2020-10-14 17:46:58,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:46:58,277 INFO L93 Difference]: Finished difference Result 1807 states and 2408 transitions. [2020-10-14 17:46:58,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 17:46:58,278 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-10-14 17:46:58,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:46:58,288 INFO L225 Difference]: With dead ends: 1807 [2020-10-14 17:46:58,288 INFO L226 Difference]: Without dead ends: 1747 [2020-10-14 17:46:58,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:46:58,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2020-10-14 17:46:58,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 324. [2020-10-14 17:46:58,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-10-14 17:46:58,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 429 transitions. [2020-10-14 17:46:58,385 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 429 transitions. Word has length 47 [2020-10-14 17:46:58,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:46:58,386 INFO L479 AbstractCegarLoop]: Abstraction has 324 states and 429 transitions. [2020-10-14 17:46:58,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 17:46:58,386 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 429 transitions. [2020-10-14 17:46:58,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 17:46:58,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:46:58,389 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:46:58,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 17:46:58,389 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:46:58,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:46:58,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1897660079, now seen corresponding path program 2 times [2020-10-14 17:46:58,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:46:58,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778595725] [2020-10-14 17:46:58,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:46:58,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:58,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:58,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:58,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:59,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:59,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:03,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:03,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 17:47:03,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:47:03,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:47:03,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:03,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:03,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:47:03,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:03,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 17:47:03,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:05,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:05,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:05,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:05,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:05,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:05,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:05,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:47:05,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:05,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:05,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:05,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:05,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:05,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:05,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-14 17:47:05,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:05,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:05,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:05,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-14 17:47:05,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:05,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 17:47:05,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:05,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:05,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:47:05,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:05,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 17:47:05,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 19 refuted. 2 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 17:47:05,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778595725] [2020-10-14 17:47:05,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:05,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:47:05,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500335737] [2020-10-14 17:47:05,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:47:05,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:05,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:47:05,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=107, Unknown=1, NotChecked=0, Total=132 [2020-10-14 17:47:05,756 INFO L87 Difference]: Start difference. First operand 324 states and 429 transitions. Second operand 12 states. [2020-10-14 17:47:20,949 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-10-14 17:47:29,957 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2020-10-14 17:47:40,542 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 38 [2020-10-14 17:47:47,045 WARN L193 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 49 DAG size of output: 47