/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/list-properties/splice-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:35:18,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:35:18,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:35:18,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:35:18,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:35:18,645 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:35:18,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:35:18,649 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:35:18,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:35:18,656 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:35:18,657 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:35:18,659 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:35:18,660 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:35:18,663 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:35:18,666 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:35:18,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:35:18,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:35:18,673 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:35:18,674 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:35:18,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:35:18,683 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:35:18,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:35:18,685 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:35:18,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:35:18,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:35:18,698 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:35:18,699 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:35:18,699 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:35:18,700 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:35:18,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:35:18,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:35:18,704 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:35:18,705 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:35:18,705 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:35:18,707 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:35:18,707 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:35:18,708 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:35:18,708 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:35:18,709 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:35:18,710 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:35:18,711 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:35:18,712 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 23:35:18,749 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:35:18,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:35:18,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:35:18,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:35:18,751 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:35:18,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:35:18,752 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:35:18,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:35:18,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:35:18,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:35:18,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:35:18,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:35:18,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:35:18,753 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:35:18,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:35:18,753 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:35:18,753 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:35:18,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:35:18,754 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:35:18,754 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:35:18,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:35:18,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:35:18,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:35:18,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:35:18,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:35:18,755 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:35:18,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:35:18,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:35:18,756 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:35:18,756 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 23:35:19,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:35:19,124 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:35:19,131 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:35:19,133 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:35:19,136 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:35:19,137 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/splice-2.i [2020-10-14 23:35:19,201 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d208eb88a/b6f29d7a24ef429183601078f1c5b401/FLAG8838bcff0 [2020-10-14 23:35:19,764 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:35:19,765 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/splice-2.i [2020-10-14 23:35:19,779 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d208eb88a/b6f29d7a24ef429183601078f1c5b401/FLAG8838bcff0 [2020-10-14 23:35:20,038 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d208eb88a/b6f29d7a24ef429183601078f1c5b401 [2020-10-14 23:35:20,049 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:35:20,051 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:35:20,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:35:20,057 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:35:20,061 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:35:20,062 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:35:20" (1/1) ... [2020-10-14 23:35:20,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59fe9fc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:35:20, skipping insertion in model container [2020-10-14 23:35:20,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:35:20" (1/1) ... [2020-10-14 23:35:20,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:35:20,131 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:35:20,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:35:20,559 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:35:20,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:35:20,710 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:35:20,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:35:20 WrapperNode [2020-10-14 23:35:20,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:35:20,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:35:20,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:35:20,712 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:35:20,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:35:20" (1/1) ... [2020-10-14 23:35:20,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:35:20" (1/1) ... [2020-10-14 23:35:20,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:35:20" (1/1) ... [2020-10-14 23:35:20,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:35:20" (1/1) ... [2020-10-14 23:35:20,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:35:20" (1/1) ... [2020-10-14 23:35:20,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:35:20" (1/1) ... [2020-10-14 23:35:20,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:35:20" (1/1) ... [2020-10-14 23:35:20,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:35:20,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:35:20,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:35:20,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:35:20,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:35:20" (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 23:35:20,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:35:20,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:35:20,857 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-14 23:35:20,857 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-14 23:35:20,857 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-14 23:35:20,857 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-14 23:35:20,857 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-14 23:35:20,857 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-14 23:35:20,857 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:35:20,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:35:20,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 23:35:20,858 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-14 23:35:20,858 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-14 23:35:20,858 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-14 23:35:20,858 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-14 23:35:20,859 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-14 23:35:20,859 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-14 23:35:20,859 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-14 23:35:20,860 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-14 23:35:20,860 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-14 23:35:20,860 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-14 23:35:20,861 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-14 23:35:20,861 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-14 23:35:20,861 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-14 23:35:20,863 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-14 23:35:20,863 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-14 23:35:20,864 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-14 23:35:20,864 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-14 23:35:20,864 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-14 23:35:20,864 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-14 23:35:20,864 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-14 23:35:20,864 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-14 23:35:20,864 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-14 23:35:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-14 23:35:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-14 23:35:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-14 23:35:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-14 23:35:20,867 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-14 23:35:20,867 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-14 23:35:20,867 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-14 23:35:20,867 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-14 23:35:20,867 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-14 23:35:20,868 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-14 23:35:20,868 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-14 23:35:20,869 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-14 23:35:20,869 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-14 23:35:20,869 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-14 23:35:20,869 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-14 23:35:20,870 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-14 23:35:20,870 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-14 23:35:20,870 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-14 23:35:20,871 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-14 23:35:20,871 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-14 23:35:20,871 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-14 23:35:20,871 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-14 23:35:20,872 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-14 23:35:20,872 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-14 23:35:20,872 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-14 23:35:20,872 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-14 23:35:20,872 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-14 23:35:20,872 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-14 23:35:20,872 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-14 23:35:20,872 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-14 23:35:20,872 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-14 23:35:20,872 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-14 23:35:20,873 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-14 23:35:20,873 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 23:35:20,873 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-14 23:35:20,874 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-14 23:35:20,874 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-14 23:35:20,875 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-14 23:35:20,875 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-14 23:35:20,876 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-14 23:35:20,876 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-14 23:35:20,876 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 23:35:20,876 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-14 23:35:20,876 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-14 23:35:20,876 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-14 23:35:20,876 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 23:35:20,876 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-14 23:35:20,876 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-14 23:35:20,876 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-14 23:35:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-14 23:35:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-14 23:35:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-14 23:35:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-14 23:35:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-14 23:35:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-14 23:35:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-14 23:35:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-14 23:35:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-14 23:35:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-14 23:35:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-14 23:35:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-14 23:35:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-14 23:35:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-14 23:35:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-14 23:35:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-14 23:35:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-14 23:35:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-14 23:35:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-14 23:35:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-14 23:35:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-14 23:35:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-14 23:35:20,879 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-14 23:35:20,879 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-14 23:35:20,879 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-14 23:35:20,879 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-14 23:35:20,879 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-14 23:35:20,879 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-14 23:35:20,879 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-14 23:35:20,879 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-14 23:35:20,879 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-14 23:35:20,879 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-14 23:35:20,879 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-14 23:35:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-14 23:35:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-14 23:35:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-14 23:35:20,881 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-14 23:35:20,881 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:35:20,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 23:35:20,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 23:35:20,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-14 23:35:20,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-14 23:35:20,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 23:35:20,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:35:20,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:35:20,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 23:35:21,273 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-14 23:35:21,452 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:35:21,452 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-14 23:35:21,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:35:21 BoogieIcfgContainer [2020-10-14 23:35:21,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:35:21,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:35:21,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:35:21,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:35:21,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:35:20" (1/3) ... [2020-10-14 23:35:21,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4404ed56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:35:21, skipping insertion in model container [2020-10-14 23:35:21,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:35:20" (2/3) ... [2020-10-14 23:35:21,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4404ed56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:35:21, skipping insertion in model container [2020-10-14 23:35:21,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:35:21" (3/3) ... [2020-10-14 23:35:21,465 INFO L109 eAbstractionObserver]: Analyzing ICFG splice-2.i [2020-10-14 23:35:21,475 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:35:21,483 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:35:21,497 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:35:21,523 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:35:21,523 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:35:21,523 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:35:21,523 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:35:21,524 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:35:21,524 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:35:21,524 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:35:21,524 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:35:21,543 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-14 23:35:21,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 23:35:21,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:21,552 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:21,552 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:21,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:21,559 INFO L82 PathProgramCache]: Analyzing trace with hash 661731879, now seen corresponding path program 1 times [2020-10-14 23:35:21,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:21,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909210362] [2020-10-14 23:35:21,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:21,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:21,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:21,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:21,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:21,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:22,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:22,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 23:35:22,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:35:22,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 486 [2020-10-14 23:35:22,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:22,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:22,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:35:22,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:35:22,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 23:35:22,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 23:35:22,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:22,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:22,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:22,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:22,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:22,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:22,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 23:35:22,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:22,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:22,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:22,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:22,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:22,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:22,284 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 23:35:22,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909210362] [2020-10-14 23:35:22,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:35:22,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 23:35:22,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680748253] [2020-10-14 23:35:22,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:35:22,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:22,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:35:22,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:35:22,312 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 5 states. [2020-10-14 23:35:22,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:22,529 INFO L93 Difference]: Finished difference Result 68 states and 98 transitions. [2020-10-14 23:35:22,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:35:22,531 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-14 23:35:22,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:22,542 INFO L225 Difference]: With dead ends: 68 [2020-10-14 23:35:22,542 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 23:35:22,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 23:35:22,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 23:35:22,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2020-10-14 23:35:22,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 23:35:22,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-10-14 23:35:22,595 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 16 [2020-10-14 23:35:22,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:22,595 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-10-14 23:35:22,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:35:22,596 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-10-14 23:35:22,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:35:22,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:22,598 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] [2020-10-14 23:35:22,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:35:22,599 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:22,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:22,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1925443576, now seen corresponding path program 1 times [2020-10-14 23:35:22,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:22,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985921091] [2020-10-14 23:35:22,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:22,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:22,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:22,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:22,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:35:22,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:35:22,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-10-14 23:35:22,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:22,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:22,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:35:22,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 23:35:22,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 23:35:22,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:22,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:22,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:22,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:22,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:22,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:22,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:35:22,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:22,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:22,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:22,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:22,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:22,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 23:35:22,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:35:22,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985921091] [2020-10-14 23:35:22,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:35:22,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 23:35:22,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281797381] [2020-10-14 23:35:22,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:35:22,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:22,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:35:22,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:35:22,984 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 5 states. [2020-10-14 23:35:23,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:23,107 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2020-10-14 23:35:23,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:35:23,108 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-14 23:35:23,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:23,109 INFO L225 Difference]: With dead ends: 46 [2020-10-14 23:35:23,109 INFO L226 Difference]: Without dead ends: 39 [2020-10-14 23:35:23,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 23:35:23,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-14 23:35:23,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2020-10-14 23:35:23,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 23:35:23,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2020-10-14 23:35:23,124 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 24 [2020-10-14 23:35:23,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:23,125 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2020-10-14 23:35:23,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:35:23,126 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2020-10-14 23:35:23,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:35:23,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:23,129 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] [2020-10-14 23:35:23,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:35:23,129 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:23,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:23,130 INFO L82 PathProgramCache]: Analyzing trace with hash 777953469, now seen corresponding path program 1 times [2020-10-14 23:35:23,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:23,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419622516] [2020-10-14 23:35:23,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:23,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:23,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:23,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:23,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:23,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:35:23,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:35:23,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-14 23:35:23,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:23,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:23,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:35:23,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 23:35:23,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 23:35:23,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:23,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:23,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:23,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:23,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:23,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:23,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:23,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:35:23,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:23,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:23,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:23,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:23,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:23,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:35:23,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419622516] [2020-10-14 23:35:23,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:35:23,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 23:35:23,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129689573] [2020-10-14 23:35:23,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:35:23,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:23,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:35:23,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:35:23,503 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 5 states. [2020-10-14 23:35:23,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:23,599 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2020-10-14 23:35:23,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:35:23,600 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-14 23:35:23,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:23,603 INFO L225 Difference]: With dead ends: 53 [2020-10-14 23:35:23,603 INFO L226 Difference]: Without dead ends: 45 [2020-10-14 23:35:23,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 23:35:23,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-14 23:35:23,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-10-14 23:35:23,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 23:35:23,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2020-10-14 23:35:23,613 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 26 [2020-10-14 23:35:23,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:23,613 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2020-10-14 23:35:23,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:35:23,613 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2020-10-14 23:35:23,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:35:23,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:23,615 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] [2020-10-14 23:35:23,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:35:23,615 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:23,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:23,616 INFO L82 PathProgramCache]: Analyzing trace with hash -743556192, now seen corresponding path program 1 times [2020-10-14 23:35:23,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:23,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131600830] [2020-10-14 23:35:23,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:23,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:23,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:23,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:23,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:35:23,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:23,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-14 23:35:23,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:23,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:23,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:35:23,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:35:23,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:35:23,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:23,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:23,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:23,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:23,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:23,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:23,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:35:23,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:23,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:23,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:23,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:23,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:23,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:23,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131600830] [2020-10-14 23:35:23,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:23,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:35:23,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103873472] [2020-10-14 23:35:23,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:35:23,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:23,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:35:23,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:35:23,979 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 11 states. [2020-10-14 23:35:24,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:24,417 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2020-10-14 23:35:24,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:35:24,418 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-14 23:35:24,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:24,420 INFO L225 Difference]: With dead ends: 85 [2020-10-14 23:35:24,420 INFO L226 Difference]: Without dead ends: 83 [2020-10-14 23:35:24,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:35:24,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-14 23:35:24,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 59. [2020-10-14 23:35:24,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 23:35:24,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2020-10-14 23:35:24,431 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 27 [2020-10-14 23:35:24,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:24,431 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2020-10-14 23:35:24,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:35:24,432 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2020-10-14 23:35:24,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:35:24,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:24,434 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] [2020-10-14 23:35:24,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:35:24,434 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:24,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:24,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1963063202, now seen corresponding path program 1 times [2020-10-14 23:35:24,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:24,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848441295] [2020-10-14 23:35:24,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:24,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:24,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:24,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:35:24,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:24,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-14 23:35:24,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:24,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:24,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:35:24,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:24,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 23:35:24,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:24,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:24,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:24,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:24,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:24,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:24,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:24,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:35:24,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:24,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:24,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:24,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:24,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:24,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:24,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:35:24,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848441295] [2020-10-14 23:35:24,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:35:24,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 23:35:24,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503713538] [2020-10-14 23:35:24,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:35:24,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:24,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:35:24,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:35:24,568 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand 4 states. [2020-10-14 23:35:24,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:24,680 INFO L93 Difference]: Finished difference Result 106 states and 138 transitions. [2020-10-14 23:35:24,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:35:24,681 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-14 23:35:24,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:24,682 INFO L225 Difference]: With dead ends: 106 [2020-10-14 23:35:24,682 INFO L226 Difference]: Without dead ends: 73 [2020-10-14 23:35:24,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:35:24,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-14 23:35:24,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2020-10-14 23:35:24,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-14 23:35:24,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-10-14 23:35:24,692 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 27 [2020-10-14 23:35:24,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:24,692 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-10-14 23:35:24,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:35:24,692 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-10-14 23:35:24,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 23:35:24,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:24,694 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:24,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:35:24,694 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:24,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:24,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1592893925, now seen corresponding path program 1 times [2020-10-14 23:35:24,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:24,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362437379] [2020-10-14 23:35:24,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:24,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:24,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:24,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:35:24,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:24,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-14 23:35:24,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:24,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:24,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:35:24,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 23:35:24,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:35:24,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:25,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:25,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:25,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:25,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:25,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:25,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:25,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 23:35:25,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:25,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:25,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:25,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:25,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:25,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:25,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:35:25,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362437379] [2020-10-14 23:35:25,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:25,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:35:25,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516261254] [2020-10-14 23:35:25,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:35:25,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:25,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:35:25,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:35:25,111 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 7 states. [2020-10-14 23:35:25,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:25,349 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2020-10-14 23:35:25,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:35:25,350 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-14 23:35:25,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:25,351 INFO L225 Difference]: With dead ends: 76 [2020-10-14 23:35:25,351 INFO L226 Difference]: Without dead ends: 68 [2020-10-14 23:35:25,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:35:25,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-14 23:35:25,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2020-10-14 23:35:25,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 23:35:25,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-10-14 23:35:25,367 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 29 [2020-10-14 23:35:25,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:25,369 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-10-14 23:35:25,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:35:25,369 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-10-14 23:35:25,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:35:25,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:25,374 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 23:35:25,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:35:25,375 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:25,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:25,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1278392056, now seen corresponding path program 2 times [2020-10-14 23:35:25,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:25,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721247805] [2020-10-14 23:35:25,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:25,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:25,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:25,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:25,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:25,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:35:25,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:35:25,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 406 [2020-10-14 23:35:25,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:25,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:25,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:35:25,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:25,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:35:25,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:26,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:26,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:26,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:26,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:26,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:26,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:35:26,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:26,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:26,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:26,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:26,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:26,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:26,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721247805] [2020-10-14 23:35:26,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:26,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:35:26,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737895728] [2020-10-14 23:35:26,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:35:26,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:26,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:35:26,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:35:26,046 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 12 states. [2020-10-14 23:35:26,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:26,894 INFO L93 Difference]: Finished difference Result 96 states and 119 transitions. [2020-10-14 23:35:26,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:35:26,895 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-14 23:35:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:26,896 INFO L225 Difference]: With dead ends: 96 [2020-10-14 23:35:26,896 INFO L226 Difference]: Without dead ends: 69 [2020-10-14 23:35:26,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:35:26,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-14 23:35:26,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2020-10-14 23:35:26,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-14 23:35:26,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2020-10-14 23:35:26,905 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 30 [2020-10-14 23:35:26,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:26,905 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2020-10-14 23:35:26,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:35:26,905 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2020-10-14 23:35:26,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:35:26,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:26,906 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:26,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:35:26,907 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:26,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:26,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1957621515, now seen corresponding path program 3 times [2020-10-14 23:35:26,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:26,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112055893] [2020-10-14 23:35:26,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:26,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:26,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:26,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:27,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:27,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:35:27,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:35:27,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-10-14 23:35:27,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:27,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:27,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:35:27,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:27,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:35:27,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:27,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:27,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:27,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:27,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:27,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:27,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:27,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:35:27,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:27,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:27,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:27,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:27,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:27,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:27,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:27,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112055893] [2020-10-14 23:35:27,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:27,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:35:27,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063697506] [2020-10-14 23:35:27,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:35:27,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:27,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:35:27,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:35:27,677 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand 15 states. [2020-10-14 23:35:28,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:28,887 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2020-10-14 23:35:28,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:35:28,888 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-10-14 23:35:28,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:28,890 INFO L225 Difference]: With dead ends: 102 [2020-10-14 23:35:28,890 INFO L226 Difference]: Without dead ends: 84 [2020-10-14 23:35:28,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:35:28,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-14 23:35:28,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 65. [2020-10-14 23:35:28,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 23:35:28,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2020-10-14 23:35:28,898 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 33 [2020-10-14 23:35:28,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:28,898 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2020-10-14 23:35:28,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:35:28,899 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2020-10-14 23:35:28,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:35:28,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:28,900 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 23:35:28,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 23:35:28,900 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:28,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:28,900 INFO L82 PathProgramCache]: Analyzing trace with hash 748997879, now seen corresponding path program 1 times [2020-10-14 23:35:28,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:28,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266295085] [2020-10-14 23:35:28,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:28,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:28,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:29,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:29,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:29,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:35:29,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:35:29,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1047 [2020-10-14 23:35:29,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:29,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:29,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:35:29,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:29,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:35:29,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:30,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:30,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:30,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:30,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:30,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:30,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:30,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:30,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:30,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:30,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:30,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:30,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:30,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266295085] [2020-10-14 23:35:30,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:30,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:35:30,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018554744] [2020-10-14 23:35:30,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:35:30,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:30,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:35:30,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:35:30,280 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 15 states. [2020-10-14 23:35:30,944 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-10-14 23:35:31,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:31,572 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2020-10-14 23:35:31,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:35:31,573 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-10-14 23:35:31,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:31,574 INFO L225 Difference]: With dead ends: 87 [2020-10-14 23:35:31,574 INFO L226 Difference]: Without dead ends: 82 [2020-10-14 23:35:31,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2020-10-14 23:35:31,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-14 23:35:31,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2020-10-14 23:35:31,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 23:35:31,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2020-10-14 23:35:31,582 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 33 [2020-10-14 23:35:31,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:31,583 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2020-10-14 23:35:31,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:35:31,583 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2020-10-14 23:35:31,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 23:35:31,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:31,584 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:31,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 23:35:31,585 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:31,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:31,586 INFO L82 PathProgramCache]: Analyzing trace with hash 196177429, now seen corresponding path program 1 times [2020-10-14 23:35:31,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:31,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116940338] [2020-10-14 23:35:31,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:31,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:31,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:31,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:31,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:35:31,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:31,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-14 23:35:31,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:31,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:31,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:35:31,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:35:31,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 23:35:31,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:31,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:31,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:31,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:31,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:31,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:31,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:31,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:31,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:31,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:31,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:31,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:31,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:31,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:31,682 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 23:35:31,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116940338] [2020-10-14 23:35:31,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:35:31,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 23:35:31,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499954282] [2020-10-14 23:35:31,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:35:31,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:31,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:35:31,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:35:31,685 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 4 states. [2020-10-14 23:35:31,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:31,759 INFO L93 Difference]: Finished difference Result 123 states and 144 transitions. [2020-10-14 23:35:31,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:35:31,759 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-10-14 23:35:31,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:31,760 INFO L225 Difference]: With dead ends: 123 [2020-10-14 23:35:31,760 INFO L226 Difference]: Without dead ends: 75 [2020-10-14 23:35:31,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:35:31,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-14 23:35:31,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2020-10-14 23:35:31,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 23:35:31,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2020-10-14 23:35:31,774 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 36 [2020-10-14 23:35:31,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:31,775 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2020-10-14 23:35:31,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:35:31,775 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2020-10-14 23:35:31,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 23:35:31,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:31,776 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] [2020-10-14 23:35:31,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 23:35:31,777 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:31,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:31,780 INFO L82 PathProgramCache]: Analyzing trace with hash -621471021, now seen corresponding path program 1 times [2020-10-14 23:35:31,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:31,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701582837] [2020-10-14 23:35:31,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:31,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:31,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:32,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:32,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:35:32,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:32,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 541 [2020-10-14 23:35:32,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:32,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:32,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:35:32,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:32,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 23:35:32,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:32,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:32,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:32,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:32,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:32,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:32,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:35:32,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:32,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:32,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:32,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:32,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:32,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:32,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701582837] [2020-10-14 23:35:32,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:32,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:35:32,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665402122] [2020-10-14 23:35:32,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:35:32,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:32,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:35:32,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:35:32,704 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 18 states. [2020-10-14 23:35:33,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:33,575 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2020-10-14 23:35:33,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:35:33,576 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-10-14 23:35:33,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:33,578 INFO L225 Difference]: With dead ends: 83 [2020-10-14 23:35:33,578 INFO L226 Difference]: Without dead ends: 78 [2020-10-14 23:35:33,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:35:33,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-14 23:35:33,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 55. [2020-10-14 23:35:33,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 23:35:33,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-10-14 23:35:33,584 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 36 [2020-10-14 23:35:33,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:33,585 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-10-14 23:35:33,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:35:33,585 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-10-14 23:35:33,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 23:35:33,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:33,586 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] [2020-10-14 23:35:33,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 23:35:33,587 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:33,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:33,587 INFO L82 PathProgramCache]: Analyzing trace with hash -234871608, now seen corresponding path program 1 times [2020-10-14 23:35:33,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:33,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773958682] [2020-10-14 23:35:33,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:33,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:33,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:33,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:34,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:34,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:34,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 23:35:34,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:35:34,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1163 [2020-10-14 23:35:34,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:34,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:34,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:35:34,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:34,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 23:35:34,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:34,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:34,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:34,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:34,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:34,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:34,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:35:34,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:34,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:34,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:34,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:34,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:34,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:34,878 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 23:35:34,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773958682] [2020-10-14 23:35:34,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:34,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:35:34,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820879507] [2020-10-14 23:35:34,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:35:34,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:34,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:35:34,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:35:34,881 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 7 states. [2020-10-14 23:35:35,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:35,144 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2020-10-14 23:35:35,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:35:35,145 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-14 23:35:35,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:35,145 INFO L225 Difference]: With dead ends: 68 [2020-10-14 23:35:35,146 INFO L226 Difference]: Without dead ends: 63 [2020-10-14 23:35:35,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:35:35,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-14 23:35:35,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2020-10-14 23:35:35,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 23:35:35,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-10-14 23:35:35,153 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 38 [2020-10-14 23:35:35,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:35,154 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-10-14 23:35:35,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:35:35,154 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-10-14 23:35:35,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 23:35:35,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:35,155 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-14 23:35:35,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 23:35:35,155 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:35,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:35,156 INFO L82 PathProgramCache]: Analyzing trace with hash -233161586, now seen corresponding path program 1 times [2020-10-14 23:35:35,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:35,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818770549] [2020-10-14 23:35:35,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:35,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:35,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:35,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:35,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 23:35:35,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:35,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-14 23:35:35,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:35,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:35,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:35:35,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 23:35:35,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:35:35,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:35,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:35,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:35,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:35,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:35,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:35,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:35:35,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:35,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:35,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:35,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:35,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:35,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-14 23:35:35,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818770549] [2020-10-14 23:35:35,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:35,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:35:35,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278849215] [2020-10-14 23:35:35,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:35:35,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:35,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:35:35,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:35:35,515 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 8 states. [2020-10-14 23:35:35,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:35,671 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2020-10-14 23:35:35,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:35:35,671 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-10-14 23:35:35,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:35,672 INFO L225 Difference]: With dead ends: 69 [2020-10-14 23:35:35,672 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 23:35:35,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:35:35,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 23:35:35,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-10-14 23:35:35,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-14 23:35:35,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2020-10-14 23:35:35,679 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 38 [2020-10-14 23:35:35,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:35,679 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2020-10-14 23:35:35,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:35:35,679 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2020-10-14 23:35:35,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 23:35:35,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:35,680 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-14 23:35:35,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 23:35:35,681 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:35,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:35,681 INFO L82 PathProgramCache]: Analyzing trace with hash -2076362507, now seen corresponding path program 2 times [2020-10-14 23:35:35,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:35,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415111551] [2020-10-14 23:35:35,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:35,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:35,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:36,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:36,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 23:35:36,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:36,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 525 [2020-10-14 23:35:36,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:36,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:36,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:35:36,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:36,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 23:35:36,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:36,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:36,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:36,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:36,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:36,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:36,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:36,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:35:36,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:36,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:36,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:36,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:36,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:36,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:36,718 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:36,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415111551] [2020-10-14 23:35:36,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:36,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:35:36,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049272295] [2020-10-14 23:35:36,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:35:36,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:36,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:35:36,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:35:36,720 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 16 states. [2020-10-14 23:35:37,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:37,559 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2020-10-14 23:35:37,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:35:37,559 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-14 23:35:37,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:37,560 INFO L225 Difference]: With dead ends: 91 [2020-10-14 23:35:37,561 INFO L226 Difference]: Without dead ends: 77 [2020-10-14 23:35:37,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:35:37,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-14 23:35:37,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2020-10-14 23:35:37,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-14 23:35:37,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2020-10-14 23:35:37,571 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 39 [2020-10-14 23:35:37,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:37,571 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2020-10-14 23:35:37,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:35:37,571 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2020-10-14 23:35:37,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 23:35:37,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:37,572 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] [2020-10-14 23:35:37,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 23:35:37,572 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:37,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:37,573 INFO L82 PathProgramCache]: Analyzing trace with hash -731659325, now seen corresponding path program 1 times [2020-10-14 23:35:37,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:37,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74267066] [2020-10-14 23:35:37,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:37,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:37,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:37,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 23:35:37,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:37,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 360 [2020-10-14 23:35:37,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:37,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:37,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:35:37,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:37,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 23:35:37,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:38,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:38,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:38,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:38,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:38,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:38,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:35:38,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:38,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:38,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:38,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:38,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:38,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:38,437 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:35:38,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74267066] [2020-10-14 23:35:38,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:38,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:35:38,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053641291] [2020-10-14 23:35:38,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:35:38,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:38,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:35:38,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:35:38,439 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand 18 states. [2020-10-14 23:35:39,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:39,266 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2020-10-14 23:35:39,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:35:39,269 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-10-14 23:35:39,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:39,270 INFO L225 Difference]: With dead ends: 89 [2020-10-14 23:35:39,270 INFO L226 Difference]: Without dead ends: 87 [2020-10-14 23:35:39,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:35:39,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-14 23:35:39,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2020-10-14 23:35:39,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 23:35:39,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2020-10-14 23:35:39,289 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 40 [2020-10-14 23:35:39,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:39,289 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2020-10-14 23:35:39,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:35:39,290 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2020-10-14 23:35:39,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 23:35:39,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:39,291 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:39,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 23:35:39,296 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:39,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:39,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1250078526, now seen corresponding path program 1 times [2020-10-14 23:35:39,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:39,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978623954] [2020-10-14 23:35:39,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:39,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:39,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:39,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:39,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 23:35:39,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:39,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-14 23:35:39,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:39,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:39,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:35:39,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 23:35:39,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:35:39,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:39,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:39,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:39,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:39,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:39,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:39,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:39,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:39,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:39,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:39,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:39,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:39,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:39,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:39,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-14 23:35:39,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978623954] [2020-10-14 23:35:39,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:39,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:35:39,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368104882] [2020-10-14 23:35:39,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:35:39,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:39,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:35:39,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:35:39,575 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand 7 states. [2020-10-14 23:35:39,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:39,711 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-10-14 23:35:39,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:35:39,711 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-14 23:35:39,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:39,712 INFO L225 Difference]: With dead ends: 90 [2020-10-14 23:35:39,712 INFO L226 Difference]: Without dead ends: 68 [2020-10-14 23:35:39,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:35:39,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-14 23:35:39,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2020-10-14 23:35:39,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 23:35:39,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-10-14 23:35:39,720 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 42 [2020-10-14 23:35:39,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:39,721 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-10-14 23:35:39,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:35:39,721 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-10-14 23:35:39,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 23:35:39,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:39,721 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:39,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 23:35:39,722 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:39,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:39,722 INFO L82 PathProgramCache]: Analyzing trace with hash -855225014, now seen corresponding path program 3 times [2020-10-14 23:35:39,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:39,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192802847] [2020-10-14 23:35:39,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:39,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:39,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:40,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:40,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 23:35:40,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:40,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 887 [2020-10-14 23:35:40,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:40,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:40,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:35:40,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:40,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 23:35:40,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:41,021 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-14 23:35:41,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:41,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:41,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:41,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:41,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:41,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:35:41,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:41,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:41,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:41,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:41,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:41,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:41,729 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:41,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192802847] [2020-10-14 23:35:41,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:41,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:35:41,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609812086] [2020-10-14 23:35:41,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:35:41,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:41,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:35:41,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:35:41,732 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 22 states. [2020-10-14 23:35:43,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:43,517 INFO L93 Difference]: Finished difference Result 111 states and 126 transitions. [2020-10-14 23:35:43,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:35:43,517 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-10-14 23:35:43,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:43,518 INFO L225 Difference]: With dead ends: 111 [2020-10-14 23:35:43,518 INFO L226 Difference]: Without dead ends: 109 [2020-10-14 23:35:43,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=220, Invalid=1420, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 23:35:43,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-14 23:35:43,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 87. [2020-10-14 23:35:43,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-14 23:35:43,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2020-10-14 23:35:43,529 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 45 [2020-10-14 23:35:43,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:43,529 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2020-10-14 23:35:43,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:35:43,529 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2020-10-14 23:35:43,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 23:35:43,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:43,530 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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] [2020-10-14 23:35:43,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 23:35:43,531 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:43,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:43,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1531102706, now seen corresponding path program 2 times [2020-10-14 23:35:43,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:43,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782113701] [2020-10-14 23:35:43,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:43,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:43,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:45,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:45,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 23:35:45,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:35:45,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1880 [2020-10-14 23:35:45,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:45,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:45,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:35:45,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:45,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 23:35:45,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:46,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:46,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:46,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:46,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:46,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:46,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:46,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:46,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:46,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:46,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:46,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:46,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:46,327 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:35:46,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782113701] [2020-10-14 23:35:46,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:46,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:35:46,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235042457] [2020-10-14 23:35:46,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:35:46,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:46,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:35:46,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:35:46,329 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand 19 states. [2020-10-14 23:35:46,935 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-14 23:35:47,088 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-10-14 23:35:48,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:48,010 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2020-10-14 23:35:48,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:35:48,014 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-14 23:35:48,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:48,016 INFO L225 Difference]: With dead ends: 101 [2020-10-14 23:35:48,016 INFO L226 Difference]: Without dead ends: 92 [2020-10-14 23:35:48,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 23:35:48,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-14 23:35:48,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2020-10-14 23:35:48,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-14 23:35:48,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2020-10-14 23:35:48,025 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 46 [2020-10-14 23:35:48,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:48,026 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2020-10-14 23:35:48,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:35:48,026 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2020-10-14 23:35:48,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 23:35:48,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:48,026 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:48,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 23:35:48,027 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:48,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:48,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1534159489, now seen corresponding path program 2 times [2020-10-14 23:35:48,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:48,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566398584] [2020-10-14 23:35:48,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:48,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:48,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:49,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:50,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:50,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 23:35:50,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:35:50,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2699 [2020-10-14 23:35:50,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:50,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:50,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:35:50,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:50,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 23:35:50,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:51,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:51,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:51,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:51,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:51,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:51,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:51,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:51,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:51,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:51,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:51,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:51,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:51,138 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:51,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566398584] [2020-10-14 23:35:51,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:51,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:35:51,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664437866] [2020-10-14 23:35:51,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:35:51,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:51,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:35:51,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:35:51,141 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand 18 states. [2020-10-14 23:35:52,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:52,206 INFO L93 Difference]: Finished difference Result 123 states and 141 transitions. [2020-10-14 23:35:52,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:35:52,207 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-10-14 23:35:52,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:52,208 INFO L225 Difference]: With dead ends: 123 [2020-10-14 23:35:52,208 INFO L226 Difference]: Without dead ends: 118 [2020-10-14 23:35:52,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:35:52,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-14 23:35:52,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 95. [2020-10-14 23:35:52,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-14 23:35:52,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2020-10-14 23:35:52,220 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 47 [2020-10-14 23:35:52,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:52,220 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2020-10-14 23:35:52,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:35:52,220 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2020-10-14 23:35:52,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 23:35:52,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:52,221 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:52,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 23:35:52,221 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:52,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:52,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1532449467, now seen corresponding path program 2 times [2020-10-14 23:35:52,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:52,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132469760] [2020-10-14 23:35:52,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:52,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:52,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:53,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:53,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 23:35:53,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:53,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1116 [2020-10-14 23:35:53,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:53,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:53,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:35:53,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:53,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 23:35:53,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:54,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:54,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:54,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:54,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:54,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:54,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:35:54,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:54,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:54,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:54,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:54,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:54,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:54,456 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:54,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132469760] [2020-10-14 23:35:54,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:54,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:35:54,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913592973] [2020-10-14 23:35:54,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:35:54,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:54,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:35:54,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:35:54,459 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand 23 states. [2020-10-14 23:35:55,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:55,550 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2020-10-14 23:35:55,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 23:35:55,551 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 47 [2020-10-14 23:35:55,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:55,552 INFO L225 Difference]: With dead ends: 116 [2020-10-14 23:35:55,553 INFO L226 Difference]: Without dead ends: 114 [2020-10-14 23:35:55,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:35:55,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-14 23:35:55,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 97. [2020-10-14 23:35:55,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 23:35:55,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2020-10-14 23:35:55,565 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 47 [2020-10-14 23:35:55,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:55,565 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2020-10-14 23:35:55,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:35:55,565 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2020-10-14 23:35:55,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 23:35:55,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:55,566 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:55,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 23:35:55,566 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:55,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:55,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1924573792, now seen corresponding path program 4 times [2020-10-14 23:35:55,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:55,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701749379] [2020-10-14 23:35:55,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:55,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:56,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:57,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:57,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 23:35:57,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:35:57,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1862 [2020-10-14 23:35:57,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:57,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:57,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:35:57,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:57,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 23:35:57,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:58,333 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2020-10-14 23:35:58,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:58,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:58,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:58,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:58,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:58,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:58,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:58,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:58,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:58,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:58,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:58,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:58,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:58,648 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:58,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701749379] [2020-10-14 23:35:58,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:58,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:35:58,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978963121] [2020-10-14 23:35:58,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:35:58,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:58,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:35:58,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:35:58,650 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand 20 states. [2020-10-14 23:35:58,940 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-10-14 23:35:59,493 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2020-10-14 23:35:59,652 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2020-10-14 23:36:00,226 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-14 23:36:00,645 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-10-14 23:36:00,808 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-10-14 23:36:00,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:00,943 INFO L93 Difference]: Finished difference Result 122 states and 139 transitions. [2020-10-14 23:36:00,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 23:36:00,944 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-14 23:36:00,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:00,945 INFO L225 Difference]: With dead ends: 122 [2020-10-14 23:36:00,945 INFO L226 Difference]: Without dead ends: 103 [2020-10-14 23:36:00,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 23:36:00,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-14 23:36:00,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 97. [2020-10-14 23:36:00,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 23:36:00,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2020-10-14 23:36:00,957 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 48 [2020-10-14 23:36:00,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:00,957 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2020-10-14 23:36:00,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:36:00,957 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2020-10-14 23:36:00,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 23:36:00,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:00,958 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-10-14 23:36:00,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 23:36:00,958 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:00,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:00,959 INFO L82 PathProgramCache]: Analyzing trace with hash 488170170, now seen corresponding path program 3 times [2020-10-14 23:36:00,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:00,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569348633] [2020-10-14 23:36:00,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:00,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:01,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:01,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:02,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:03,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:03,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 23:36:03,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:36:03,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2215 [2020-10-14 23:36:03,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:03,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:03,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:36:03,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:36:03,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 23:36:03,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:03,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:36:03,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:03,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:03,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:03,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:36:03,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:03,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:36:03,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:03,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:03,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:36:03,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:36:03,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:36:03,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-14 23:36:03,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569348633] [2020-10-14 23:36:03,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:36:03,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:36:03,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15694817] [2020-10-14 23:36:03,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:36:03,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:36:03,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:36:03,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:36:03,274 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand 9 states. [2020-10-14 23:36:03,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:03,680 INFO L93 Difference]: Finished difference Result 120 states and 133 transitions. [2020-10-14 23:36:03,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:36:03,682 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-10-14 23:36:03,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:03,683 INFO L225 Difference]: With dead ends: 120 [2020-10-14 23:36:03,683 INFO L226 Difference]: Without dead ends: 115 [2020-10-14 23:36:03,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:36:03,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-14 23:36:03,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 100. [2020-10-14 23:36:03,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-14 23:36:03,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 111 transitions. [2020-10-14 23:36:03,711 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 111 transitions. Word has length 49 [2020-10-14 23:36:03,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:03,712 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 111 transitions. [2020-10-14 23:36:03,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:36:03,712 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 111 transitions. [2020-10-14 23:36:03,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 23:36:03,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:03,714 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:36:03,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 23:36:03,714 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:03,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:03,715 INFO L82 PathProgramCache]: Analyzing trace with hash 489880192, now seen corresponding path program 3 times [2020-10-14 23:36:03,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:03,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746221023] [2020-10-14 23:36:03,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:03,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:03,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:05,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:05,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:06,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:06,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 23:36:06,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:36:06,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2451 [2020-10-14 23:36:06,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:06,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:06,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:36:06,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:36:06,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 23:36:06,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:07,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:36:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:07,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:07,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:07,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:36:07,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:07,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:36:07,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:07,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:07,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:36:07,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:36:07,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:36:07,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:07,193 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:36:07,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746221023] [2020-10-14 23:36:07,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:36:07,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:36:07,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261884875] [2020-10-14 23:36:07,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:36:07,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:36:07,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:36:07,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:36:07,195 INFO L87 Difference]: Start difference. First operand 100 states and 111 transitions. Second operand 24 states. [2020-10-14 23:36:09,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:09,614 INFO L93 Difference]: Finished difference Result 128 states and 144 transitions. [2020-10-14 23:36:09,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 23:36:09,614 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 49 [2020-10-14 23:36:09,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:09,616 INFO L225 Difference]: With dead ends: 128 [2020-10-14 23:36:09,616 INFO L226 Difference]: Without dead ends: 121 [2020-10-14 23:36:09,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=240, Invalid=1830, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 23:36:09,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-14 23:36:09,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 101. [2020-10-14 23:36:09,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-14 23:36:09,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2020-10-14 23:36:09,630 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 49 [2020-10-14 23:36:09,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:09,630 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2020-10-14 23:36:09,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:36:09,630 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2020-10-14 23:36:09,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 23:36:09,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:09,631 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-14 23:36:09,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 23:36:09,631 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:09,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:09,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1673212619, now seen corresponding path program 4 times [2020-10-14 23:36:09,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:09,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975969297] [2020-10-14 23:36:09,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:09,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:09,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:10,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:10,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 23:36:10,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:10,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 673 [2020-10-14 23:36:10,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:10,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:10,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:36:10,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:36:10,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 23:36:10,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:11,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:36:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:11,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:11,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:11,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:36:11,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:11,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:36:11,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:11,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:11,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:36:11,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:36:11,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:36:11,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:11,361 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 23:36:11,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975969297] [2020-10-14 23:36:11,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:36:11,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:36:11,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083289784] [2020-10-14 23:36:11,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:36:11,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:36:11,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:36:11,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:36:11,363 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand 23 states. [2020-10-14 23:36:13,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:13,501 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2020-10-14 23:36:13,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 23:36:13,502 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 51 [2020-10-14 23:36:13,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:13,503 INFO L225 Difference]: With dead ends: 115 [2020-10-14 23:36:13,503 INFO L226 Difference]: Without dead ends: 113 [2020-10-14 23:36:13,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=208, Invalid=1514, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 23:36:13,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-14 23:36:13,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 104. [2020-10-14 23:36:13,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-14 23:36:13,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 115 transitions. [2020-10-14 23:36:13,516 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 115 transitions. Word has length 51 [2020-10-14 23:36:13,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:13,516 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 115 transitions. [2020-10-14 23:36:13,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:36:13,516 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 115 transitions. [2020-10-14 23:36:13,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 23:36:13,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:13,517 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:36:13,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 23:36:13,517 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:13,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:13,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1132117919, now seen corresponding path program 5 times [2020-10-14 23:36:13,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:13,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156362330] [2020-10-14 23:36:13,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:13,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:13,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:14,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:15,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:15,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 23:36:15,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:36:15,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1594 [2020-10-14 23:36:15,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:15,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:15,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:36:15,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:36:15,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 23:36:15,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:15,589 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2020-10-14 23:36:16,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:36:16,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:16,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:16,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:16,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:36:16,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:16,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:36:16,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:16,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:16,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:36:16,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:36:16,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:36:16,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:16,935 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:36:16,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156362330] [2020-10-14 23:36:16,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:36:16,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:36:16,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140930245] [2020-10-14 23:36:16,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:36:16,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:36:16,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:36:16,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:36:16,937 INFO L87 Difference]: Start difference. First operand 104 states and 115 transitions. Second operand 23 states. [2020-10-14 23:36:17,169 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-10-14 23:36:17,692 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2020-10-14 23:36:17,867 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 77 [2020-10-14 23:36:18,223 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2020-10-14 23:36:18,543 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-14 23:36:18,965 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 103 [2020-10-14 23:36:19,143 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-10-14 23:36:19,619 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-14 23:36:20,134 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-10-14 23:36:20,320 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2020-10-14 23:36:20,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:20,484 INFO L93 Difference]: Finished difference Result 140 states and 157 transitions. [2020-10-14 23:36:20,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 23:36:20,484 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 51 [2020-10-14 23:36:20,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:20,486 INFO L225 Difference]: With dead ends: 140 [2020-10-14 23:36:20,486 INFO L226 Difference]: Without dead ends: 129 [2020-10-14 23:36:20,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=251, Invalid=1911, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 23:36:20,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-14 23:36:20,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 123. [2020-10-14 23:36:20,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-14 23:36:20,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2020-10-14 23:36:20,503 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 51 [2020-10-14 23:36:20,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:20,504 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2020-10-14 23:36:20,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:36:20,504 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2020-10-14 23:36:20,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 23:36:20,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:20,505 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 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] [2020-10-14 23:36:20,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 23:36:20,505 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:20,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:20,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1524848169, now seen corresponding path program 5 times [2020-10-14 23:36:20,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:20,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112922843] [2020-10-14 23:36:20,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:20,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:20,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:22,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:22,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 23:36:22,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:36:22,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1693 [2020-10-14 23:36:22,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:22,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:22,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:36:22,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:36:22,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 23:36:22,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:23,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:36:23,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:23,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:23,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:23,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:36:23,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:23,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:36:23,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:23,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:23,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:36:23,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:36:23,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:36:23,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:36:23,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112922843] [2020-10-14 23:36:23,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:36:23,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:36:23,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600846522] [2020-10-14 23:36:23,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:36:23,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:36:23,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:36:23,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:36:23,222 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand 21 states. [2020-10-14 23:36:23,773 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-14 23:36:23,919 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2020-10-14 23:36:24,876 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2020-10-14 23:36:25,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:25,585 INFO L93 Difference]: Finished difference Result 137 states and 149 transitions. [2020-10-14 23:36:25,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 23:36:25,585 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-10-14 23:36:25,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:25,587 INFO L225 Difference]: With dead ends: 137 [2020-10-14 23:36:25,587 INFO L226 Difference]: Without dead ends: 128 [2020-10-14 23:36:25,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=219, Invalid=1341, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 23:36:25,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-14 23:36:25,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2020-10-14 23:36:25,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-14 23:36:25,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 135 transitions. [2020-10-14 23:36:25,603 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 135 transitions. Word has length 52 [2020-10-14 23:36:25,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:25,604 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 135 transitions. [2020-10-14 23:36:25,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:36:25,604 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 135 transitions. [2020-10-14 23:36:25,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 23:36:25,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:25,605 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-10-14 23:36:25,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 23:36:25,606 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:25,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:25,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1639504848, now seen corresponding path program 2 times [2020-10-14 23:36:25,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:25,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113837461] [2020-10-14 23:36:25,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:25,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:25,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:26,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:29,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:29,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 23:36:29,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:36:29,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3517 [2020-10-14 23:36:29,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:29,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:29,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:36:29,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:36:29,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 23:36:29,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:29,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:36:29,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:29,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:29,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:29,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:36:29,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:29,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:36:29,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:29,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:29,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:36:29,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:36:29,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:36:29,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 23:36:29,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113837461] [2020-10-14 23:36:29,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:36:29,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:36:29,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476187893] [2020-10-14 23:36:29,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:36:29,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:36:29,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:36:29,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:36:29,853 INFO L87 Difference]: Start difference. First operand 123 states and 135 transitions. Second operand 21 states. [2020-10-14 23:36:31,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:31,724 INFO L93 Difference]: Finished difference Result 148 states and 162 transitions. [2020-10-14 23:36:31,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 23:36:31,725 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-10-14 23:36:31,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:31,725 INFO L225 Difference]: With dead ends: 148 [2020-10-14 23:36:31,725 INFO L226 Difference]: Without dead ends: 121 [2020-10-14 23:36:31,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=208, Invalid=1514, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 23:36:31,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-14 23:36:31,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 104. [2020-10-14 23:36:31,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-14 23:36:31,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2020-10-14 23:36:31,738 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 53 [2020-10-14 23:36:31,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:31,738 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2020-10-14 23:36:31,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:36:31,738 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2020-10-14 23:36:31,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 23:36:31,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:31,739 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:36:31,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 23:36:31,739 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:31,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:31,740 INFO L82 PathProgramCache]: Analyzing trace with hash -208931031, now seen corresponding path program 6 times [2020-10-14 23:36:31,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:31,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958613373] [2020-10-14 23:36:31,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:31,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:31,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:33,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:33,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 23:36:33,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:33,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1272 [2020-10-14 23:36:33,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:33,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:33,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 23:36:33,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:36:33,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 23:36:33,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:34,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:36:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:34,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:34,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:34,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:36:34,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:34,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:36:34,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:34,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:34,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:36:34,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:36:34,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:36:34,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:34,516 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:36:34,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958613373] [2020-10-14 23:36:34,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:36:34,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 23:36:34,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188539129] [2020-10-14 23:36:34,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 23:36:34,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:36:34,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 23:36:34,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:36:34,520 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand 26 states. [2020-10-14 23:36:34,768 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-14 23:36:35,179 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-10-14 23:36:35,345 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-10-14 23:36:35,917 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 90 [2020-10-14 23:36:36,835 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-14 23:36:37,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:37,505 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2020-10-14 23:36:37,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 23:36:37,506 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 54 [2020-10-14 23:36:37,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:37,507 INFO L225 Difference]: With dead ends: 125 [2020-10-14 23:36:37,507 INFO L226 Difference]: Without dead ends: 123 [2020-10-14 23:36:37,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=253, Invalid=2099, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 23:36:37,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-14 23:36:37,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 110. [2020-10-14 23:36:37,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-14 23:36:37,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 124 transitions. [2020-10-14 23:36:37,524 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 124 transitions. Word has length 54 [2020-10-14 23:36:37,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:37,524 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 124 transitions. [2020-10-14 23:36:37,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 23:36:37,524 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 124 transitions. [2020-10-14 23:36:37,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 23:36:37,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:37,525 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:36:37,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 23:36:37,525 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:37,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:37,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1080777572, now seen corresponding path program 4 times [2020-10-14 23:36:37,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:37,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415878947] [2020-10-14 23:36:37,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:37,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:38,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:38,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 23:36:38,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:38,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1374 [2020-10-14 23:36:38,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:38,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:38,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 23:36:38,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:36:38,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 23:36:38,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:39,714 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-14 23:36:40,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:36:40,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:40,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:40,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:40,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:36:40,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:40,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:36:40,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:40,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:40,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:36:40,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:36:40,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:36:40,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:36:40,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415878947] [2020-10-14 23:36:40,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:36:40,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 23:36:40,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112450059] [2020-10-14 23:36:40,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 23:36:40,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:36:40,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 23:36:40,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:36:40,764 INFO L87 Difference]: Start difference. First operand 110 states and 124 transitions. Second operand 27 states. [2020-10-14 23:36:41,485 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2020-10-14 23:36:41,890 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-14 23:36:42,055 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2020-10-14 23:36:42,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:42,949 INFO L93 Difference]: Finished difference Result 127 states and 144 transitions. [2020-10-14 23:36:42,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 23:36:42,949 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 56 [2020-10-14 23:36:42,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:42,950 INFO L225 Difference]: With dead ends: 127 [2020-10-14 23:36:42,951 INFO L226 Difference]: Without dead ends: 125 [2020-10-14 23:36:42,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=132, Invalid=1350, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 23:36:42,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-14 23:36:42,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 112. [2020-10-14 23:36:42,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-14 23:36:42,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 127 transitions. [2020-10-14 23:36:42,968 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 127 transitions. Word has length 56 [2020-10-14 23:36:42,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:42,968 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 127 transitions. [2020-10-14 23:36:42,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 23:36:42,968 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 127 transitions. [2020-10-14 23:36:42,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 23:36:42,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:42,972 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:36:42,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 23:36:42,972 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:42,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:42,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1045727, now seen corresponding path program 7 times [2020-10-14 23:36:42,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:42,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464880982] [2020-10-14 23:36:42,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:43,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:43,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:43,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 23:36:43,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:43,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 920 [2020-10-14 23:36:43,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:43,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:43,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 23:36:43,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:36:43,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 23:36:43,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:44,849 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2020-10-14 23:36:45,004 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-10-14 23:36:45,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:36:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:45,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:45,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:45,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:36:45,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:45,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:36:45,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:45,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:45,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:36:45,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:36:45,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:36:45,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:36:45,570 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 14 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:36:45,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464880982] [2020-10-14 23:36:45,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:36:45,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:36:45,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034883291] [2020-10-14 23:36:45,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:36:45,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:36:45,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:36:45,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:36:45,578 INFO L87 Difference]: Start difference. First operand 112 states and 127 transitions. Second operand 24 states. [2020-10-14 23:36:45,957 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2020-10-14 23:36:46,153 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-10-14 23:36:46,647 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 96 [2020-10-14 23:36:46,862 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 89 [2020-10-14 23:36:47,648 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 111 [2020-10-14 23:36:47,825 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2020-10-14 23:36:48,376 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2020-10-14 23:36:48,576 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-14 23:36:48,990 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-10-14 23:36:49,181 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2020-10-14 23:36:49,360 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-14 23:36:49,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:49,838 INFO L93 Difference]: Finished difference Result 131 states and 150 transitions. [2020-10-14 23:36:49,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 23:36:49,838 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2020-10-14 23:36:49,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:49,839 INFO L225 Difference]: With dead ends: 131 [2020-10-14 23:36:49,839 INFO L226 Difference]: Without dead ends: 117 [2020-10-14 23:36:49,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=234, Invalid=2022, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 23:36:49,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-14 23:36:49,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2020-10-14 23:36:49,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-14 23:36:49,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2020-10-14 23:36:49,854 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 57 [2020-10-14 23:36:49,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:49,854 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2020-10-14 23:36:49,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:36:49,854 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2020-10-14 23:36:49,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 23:36:49,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:49,855 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:36:49,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 23:36:49,855 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:49,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:49,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1275990966, now seen corresponding path program 8 times [2020-10-14 23:36:49,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:49,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409369776] [2020-10-14 23:36:49,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:49,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:50,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:51,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:51,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 23:36:51,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:36:51,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1782 [2020-10-14 23:36:51,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:51,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:51,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 23:36:51,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:36:51,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 23:36:51,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:52,327 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-10-14 23:36:52,567 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-14 23:36:53,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:36:53,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:53,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:53,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:53,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:36:53,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:53,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:36:53,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:53,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:53,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:36:53,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:36:53,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:36:53,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:53,301 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:36:53,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409369776] [2020-10-14 23:36:53,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:36:53,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:36:53,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801618566] [2020-10-14 23:36:53,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:36:53,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:36:53,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:36:53,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:36:53,303 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand 25 states. [2020-10-14 23:36:53,526 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-14 23:36:54,052 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2020-10-14 23:36:54,226 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-10-14 23:36:54,629 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 76 [2020-10-14 23:36:55,017 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 114 [2020-10-14 23:36:55,420 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 106 [2020-10-14 23:36:55,611 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2020-10-14 23:36:55,795 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-14 23:36:56,159 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2020-10-14 23:36:56,458 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-14 23:36:56,605 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-10-14 23:36:56,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:56,978 INFO L93 Difference]: Finished difference Result 118 states and 131 transitions. [2020-10-14 23:36:56,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 23:36:56,979 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2020-10-14 23:36:56,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:56,980 INFO L225 Difference]: With dead ends: 118 [2020-10-14 23:36:56,980 INFO L226 Difference]: Without dead ends: 107 [2020-10-14 23:36:56,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=235, Invalid=1835, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 23:36:56,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-14 23:36:56,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-14 23:36:56,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-14 23:36:56,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2020-10-14 23:36:56,996 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 57 [2020-10-14 23:36:56,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:56,997 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2020-10-14 23:36:56,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:36:56,997 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2020-10-14 23:36:56,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 23:36:56,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:56,998 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:36:56,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 23:36:56,998 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:56,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:56,999 INFO L82 PathProgramCache]: Analyzing trace with hash -756513511, now seen corresponding path program 6 times [2020-10-14 23:36:56,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:56,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300477329] [2020-10-14 23:36:56,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:57,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:57,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:57,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:00,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:00,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 23:37:00,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:37:00,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3441 [2020-10-14 23:37:00,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:00,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:00,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 23:37:00,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:37:00,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 23:37:00,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:00,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:37:01,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:01,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:01,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:01,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:37:01,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:01,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:37:01,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:01,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:01,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:37:01,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:37:01,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:37:01,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:01,021 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 23:37:01,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300477329] [2020-10-14 23:37:01,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:37:01,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:37:01,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56078698] [2020-10-14 23:37:01,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:37:01,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:37:01,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:37:01,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:37:01,023 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand 22 states. [2020-10-14 23:37:03,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:37:03,082 INFO L93 Difference]: Finished difference Result 128 states and 140 transitions. [2020-10-14 23:37:03,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 23:37:03,083 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-10-14 23:37:03,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:37:03,084 INFO L225 Difference]: With dead ends: 128 [2020-10-14 23:37:03,084 INFO L226 Difference]: Without dead ends: 123 [2020-10-14 23:37:03,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=288, Invalid=1874, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 23:37:03,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-14 23:37:03,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 108. [2020-10-14 23:37:03,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-14 23:37:03,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2020-10-14 23:37:03,102 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 58 [2020-10-14 23:37:03,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:37:03,103 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2020-10-14 23:37:03,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:37:03,103 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2020-10-14 23:37:03,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 23:37:03,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:37:03,104 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:37:03,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 23:37:03,104 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:37:03,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:37:03,104 INFO L82 PathProgramCache]: Analyzing trace with hash -754803489, now seen corresponding path program 5 times [2020-10-14 23:37:03,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:37:03,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064437039] [2020-10-14 23:37:03,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:37:03,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:03,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:05,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:05,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 23:37:05,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:05,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2328 [2020-10-14 23:37:05,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:05,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:05,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 23:37:05,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:37:05,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 23:37:05,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:06,556 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2020-10-14 23:37:06,711 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-10-14 23:37:07,367 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 56 [2020-10-14 23:37:07,626 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 52 [2020-10-14 23:37:07,908 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 54 [2020-10-14 23:37:08,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:37:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:08,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:08,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:08,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:37:08,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:08,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:37:08,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:08,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:08,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:37:08,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:37:08,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:37:08,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:08,354 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 2 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:37:08,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064437039] [2020-10-14 23:37:08,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:37:08,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 23:37:08,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106696942] [2020-10-14 23:37:08,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 23:37:08,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:37:08,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 23:37:08,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:37:08,356 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand 26 states. [2020-10-14 23:37:08,644 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-10-14 23:37:09,153 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 86 [2020-10-14 23:37:09,389 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 80 [2020-10-14 23:37:09,578 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2020-10-14 23:37:09,834 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-14 23:37:10,170 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 102 [2020-10-14 23:37:10,574 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2020-10-14 23:37:10,784 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2020-10-14 23:37:11,099 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 84 [2020-10-14 23:37:11,321 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-14 23:37:11,758 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 59 [2020-10-14 23:37:11,936 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-10-14 23:37:12,400 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 116 [2020-10-14 23:37:13,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:37:13,141 INFO L93 Difference]: Finished difference Result 126 states and 139 transitions. [2020-10-14 23:37:13,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 23:37:13,142 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2020-10-14 23:37:13,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:37:13,143 INFO L225 Difference]: With dead ends: 126 [2020-10-14 23:37:13,143 INFO L226 Difference]: Without dead ends: 119 [2020-10-14 23:37:13,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=235, Invalid=2215, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 23:37:13,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-14 23:37:13,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2020-10-14 23:37:13,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-14 23:37:13,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2020-10-14 23:37:13,157 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 58 [2020-10-14 23:37:13,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:37:13,158 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2020-10-14 23:37:13,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 23:37:13,158 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2020-10-14 23:37:13,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 23:37:13,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:37:13,159 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 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] [2020-10-14 23:37:13,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 23:37:13,159 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:37:13,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:37:13,160 INFO L82 PathProgramCache]: Analyzing trace with hash 112083234, now seen corresponding path program 7 times [2020-10-14 23:37:13,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:37:13,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83152647] [2020-10-14 23:37:13,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:37:13,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:13,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:13,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:14,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:14,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 23:37:14,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:37:14,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1729 [2020-10-14 23:37:14,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:14,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:14,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 23:37:14,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:37:14,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 23:37:14,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:15,327 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-10-14 23:37:16,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:37:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:16,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:16,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:16,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:37:16,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:16,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:37:16,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:16,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:16,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:37:16,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:37:16,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:37:16,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:16,484 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:37:16,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83152647] [2020-10-14 23:37:16,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:37:16,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:37:16,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833785487] [2020-10-14 23:37:16,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:37:16,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:37:16,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:37:16,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:37:16,486 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand 24 states. [2020-10-14 23:37:17,483 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2020-10-14 23:37:17,720 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 62 [2020-10-14 23:37:17,912 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 60 [2020-10-14 23:37:18,223 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 65 [2020-10-14 23:37:19,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:37:19,106 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2020-10-14 23:37:19,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 23:37:19,106 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2020-10-14 23:37:19,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:37:19,107 INFO L225 Difference]: With dead ends: 121 [2020-10-14 23:37:19,107 INFO L226 Difference]: Without dead ends: 112 [2020-10-14 23:37:19,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=233, Invalid=1489, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 23:37:19,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-14 23:37:19,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 102. [2020-10-14 23:37:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-14 23:37:19,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2020-10-14 23:37:19,123 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 58 [2020-10-14 23:37:19,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:37:19,124 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2020-10-14 23:37:19,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:37:19,124 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2020-10-14 23:37:19,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 23:37:19,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:37:19,125 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:37:19,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 23:37:19,125 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:37:19,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:37:19,126 INFO L82 PathProgramCache]: Analyzing trace with hash 481645524, now seen corresponding path program 8 times [2020-10-14 23:37:19,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:37:19,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493930958] [2020-10-14 23:37:19,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:37:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:19,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:20,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:20,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 23:37:20,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:20,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1306 [2020-10-14 23:37:20,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:20,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:20,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 23:37:20,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:37:20,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 23:37:20,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:20,982 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2020-10-14 23:37:21,621 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2020-10-14 23:37:21,811 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2020-10-14 23:37:22,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:37:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:22,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:22,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:22,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:37:22,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:22,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:37:22,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:22,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:22,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:37:22,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:37:22,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:37:22,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:22,308 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 23:37:22,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493930958] [2020-10-14 23:37:22,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:37:22,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:37:22,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749840681] [2020-10-14 23:37:22,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:37:22,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:37:22,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:37:22,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:37:22,310 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand 25 states. [2020-10-14 23:37:22,562 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-10-14 23:37:23,169 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2020-10-14 23:37:23,380 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2020-10-14 23:37:23,726 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2020-10-14 23:37:24,268 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 108 [2020-10-14 23:37:24,443 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-10-14 23:37:24,614 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-14 23:37:25,010 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-14 23:37:25,200 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2020-10-14 23:37:25,565 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2020-10-14 23:37:25,731 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-10-14 23:37:26,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:37:26,318 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2020-10-14 23:37:26,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 23:37:26,319 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2020-10-14 23:37:26,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:37:26,320 INFO L225 Difference]: With dead ends: 116 [2020-10-14 23:37:26,320 INFO L226 Difference]: Without dead ends: 114 [2020-10-14 23:37:26,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=268, Invalid=2384, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 23:37:26,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-14 23:37:26,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 105. [2020-10-14 23:37:26,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-14 23:37:26,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 114 transitions. [2020-10-14 23:37:26,337 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 114 transitions. Word has length 60 [2020-10-14 23:37:26,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:37:26,338 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 114 transitions. [2020-10-14 23:37:26,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:37:26,338 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 114 transitions. [2020-10-14 23:37:26,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 23:37:26,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:37:26,339 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:37:26,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 23:37:26,339 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:37:26,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:37:26,339 INFO L82 PathProgramCache]: Analyzing trace with hash 924116916, now seen corresponding path program 9 times [2020-10-14 23:37:26,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:37:26,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146885711] [2020-10-14 23:37:26,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:37:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:26,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:27,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:28,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:28,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 23:37:28,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:37:28,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2035 [2020-10-14 23:37:28,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:28,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:28,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 23:37:28,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:37:28,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 23:37:28,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:29,052 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-14 23:37:29,200 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2020-10-14 23:37:29,406 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2020-10-14 23:37:29,770 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-10-14 23:37:29,907 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-10-14 23:37:30,256 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-10-14 23:37:30,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:37:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:30,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:30,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:30,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:37:30,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:30,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:37:30,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:30,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:30,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:37:30,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:37:30,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:37:30,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:30,889 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:37:30,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146885711] [2020-10-14 23:37:30,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:37:30,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 23:37:30,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605724920] [2020-10-14 23:37:30,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 23:37:30,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:37:30,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 23:37:30,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:37:30,891 INFO L87 Difference]: Start difference. First operand 105 states and 114 transitions. Second operand 27 states. [2020-10-14 23:37:31,505 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 23:37:31,670 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2020-10-14 23:37:31,901 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-10-14 23:37:32,252 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-10-14 23:37:32,540 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 98 [2020-10-14 23:37:33,585 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-10-14 23:37:34,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:37:34,720 INFO L93 Difference]: Finished difference Result 143 states and 157 transitions. [2020-10-14 23:37:34,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 23:37:34,721 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2020-10-14 23:37:34,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:37:34,722 INFO L225 Difference]: With dead ends: 143 [2020-10-14 23:37:34,722 INFO L226 Difference]: Without dead ends: 132 [2020-10-14 23:37:34,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=253, Invalid=2197, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 23:37:34,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-14 23:37:34,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 127. [2020-10-14 23:37:34,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-14 23:37:34,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2020-10-14 23:37:34,737 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 60 [2020-10-14 23:37:34,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:37:34,737 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2020-10-14 23:37:34,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 23:37:34,738 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2020-10-14 23:37:34,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 23:37:34,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:37:34,738 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 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] [2020-10-14 23:37:34,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 23:37:34,738 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:37:34,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:37:34,739 INFO L82 PathProgramCache]: Analyzing trace with hash -995066097, now seen corresponding path program 3 times [2020-10-14 23:37:34,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:37:34,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891473546] [2020-10-14 23:37:34,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:37:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:34,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:36,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:36,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 23:37:36,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:36,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1528 [2020-10-14 23:37:36,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:36,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:36,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 23:37:36,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:37:36,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 23:37:36,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:36,926 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-14 23:37:37,220 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-14 23:37:37,533 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-10-14 23:37:37,680 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-14 23:37:38,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:37:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:38,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:38,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:38,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:37:38,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:38,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:37:38,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:38,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:38,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:37:38,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:37:38,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:37:38,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:38,707 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 23:37:38,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891473546] [2020-10-14 23:37:38,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:37:38,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 23:37:38,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816571304] [2020-10-14 23:37:38,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 23:37:38,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:37:38,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 23:37:38,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:37:38,709 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand 27 states. [2020-10-14 23:37:39,391 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-14 23:37:39,704 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-10-14 23:37:40,433 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 78 [2020-10-14 23:37:40,817 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2020-10-14 23:37:41,303 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 104 [2020-10-14 23:37:41,497 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 49 [2020-10-14 23:37:41,878 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2020-10-14 23:37:42,111 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2020-10-14 23:37:42,361 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-10-14 23:37:42,730 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-14 23:37:43,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:37:43,765 INFO L93 Difference]: Finished difference Result 136 states and 146 transitions. [2020-10-14 23:37:43,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 23:37:43,766 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-14 23:37:43,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:37:43,767 INFO L225 Difference]: With dead ends: 136 [2020-10-14 23:37:43,767 INFO L226 Difference]: Without dead ends: 134 [2020-10-14 23:37:43,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=254, Invalid=2398, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 23:37:43,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-14 23:37:43,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 129. [2020-10-14 23:37:43,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-14 23:37:43,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2020-10-14 23:37:43,785 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 62 [2020-10-14 23:37:43,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:37:43,785 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2020-10-14 23:37:43,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 23:37:43,786 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2020-10-14 23:37:43,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 23:37:43,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:37:43,786 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:37:43,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 23:37:43,787 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:37:43,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:37:43,787 INFO L82 PathProgramCache]: Analyzing trace with hash 484455540, now seen corresponding path program 10 times [2020-10-14 23:37:43,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:37:43,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430098288] [2020-10-14 23:37:43,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:37:43,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:43,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:45,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:45,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 23:37:45,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:45,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1388 [2020-10-14 23:37:45,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:45,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:45,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 23:37:45,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:37:45,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 23:37:45,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:45,781 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-10-14 23:37:46,033 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-10-14 23:37:46,354 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2020-10-14 23:37:46,577 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2020-10-14 23:37:46,747 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2020-10-14 23:37:46,942 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2020-10-14 23:37:47,092 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-14 23:37:47,362 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-14 23:37:47,553 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-14 23:37:47,704 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-10-14 23:37:48,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:37:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:48,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:48,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:48,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:37:48,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:48,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:37:48,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:48,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:48,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:37:48,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:37:48,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:37:48,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:37:48,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430098288] [2020-10-14 23:37:48,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:37:48,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 23:37:48,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110026701] [2020-10-14 23:37:48,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 23:37:48,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:37:48,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 23:37:48,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2020-10-14 23:37:48,370 INFO L87 Difference]: Start difference. First operand 129 states and 139 transitions. Second operand 30 states. [2020-10-14 23:37:49,372 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 54 [2020-10-14 23:37:49,577 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 45 [2020-10-14 23:37:49,773 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-14 23:37:50,018 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 70 [2020-10-14 23:37:50,212 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2020-10-14 23:37:50,483 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 63 [2020-10-14 23:37:50,805 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 82 [2020-10-14 23:37:51,249 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 71 [2020-10-14 23:37:51,885 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 66 [2020-10-14 23:37:52,367 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 56 [2020-10-14 23:37:54,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:37:54,550 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2020-10-14 23:37:54,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 23:37:54,551 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 63 [2020-10-14 23:37:54,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:37:54,552 INFO L225 Difference]: With dead ends: 160 [2020-10-14 23:37:54,553 INFO L226 Difference]: Without dead ends: 158 [2020-10-14 23:37:54,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=343, Invalid=2963, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 23:37:54,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-14 23:37:54,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 135. [2020-10-14 23:37:54,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-14 23:37:54,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 147 transitions. [2020-10-14 23:37:54,584 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 147 transitions. Word has length 63 [2020-10-14 23:37:54,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:37:54,584 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 147 transitions. [2020-10-14 23:37:54,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 23:37:54,584 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 147 transitions. [2020-10-14 23:37:54,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 23:37:54,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:37:54,585 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 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] [2020-10-14 23:37:54,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 23:37:54,585 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:37:54,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:37:54,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1519241098, now seen corresponding path program 4 times [2020-10-14 23:37:54,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:37:54,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930648890] [2020-10-14 23:37:54,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:37:54,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:54,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:55,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:56,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:56,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:59,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:59,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 23:37:59,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:37:59,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 23:37:59,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:59,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:59,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 23:37:59,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:37:59,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 23:37:59,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:38:00,053 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-14 23:38:01,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:38:01,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:38:01,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:38:01,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:38:01,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:38:01,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:38:01,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:38:01,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:38:01,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:38:01,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:38:01,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:38:01,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:38:01,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:38:01,451 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 23:38:01,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930648890] [2020-10-14 23:38:01,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:38:01,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 23:38:01,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482272949] [2020-10-14 23:38:01,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 23:38:01,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:38:01,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 23:38:01,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:38:01,454 INFO L87 Difference]: Start difference. First operand 135 states and 147 transitions. Second operand 28 states. [2020-10-14 23:38:02,598 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 53 [2020-10-14 23:38:02,896 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 58 [2020-10-14 23:38:03,128 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 61 [2020-10-14 23:38:03,390 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 56 [2020-10-14 23:38:05,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:38:05,512 INFO L93 Difference]: Finished difference Result 165 states and 181 transitions. [2020-10-14 23:38:05,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 23:38:05,513 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 64 [2020-10-14 23:38:05,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:38:05,515 INFO L225 Difference]: With dead ends: 165 [2020-10-14 23:38:05,515 INFO L226 Difference]: Without dead ends: 163 [2020-10-14 23:38:05,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=308, Invalid=2662, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 23:38:05,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-14 23:38:05,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 144. [2020-10-14 23:38:05,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-14 23:38:05,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 160 transitions. [2020-10-14 23:38:05,534 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 160 transitions. Word has length 64 [2020-10-14 23:38:05,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:38:05,534 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 160 transitions. [2020-10-14 23:38:05,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 23:38:05,534 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 160 transitions. [2020-10-14 23:38:05,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 23:38:05,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:38:05,535 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:38:05,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 23:38:05,535 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:38:05,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:38:05,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1703631401, now seen corresponding path program 3 times [2020-10-14 23:38:05,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:38:05,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146580102] [2020-10-14 23:38:05,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:38:05,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:38:05,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:38:06,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:38:08,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:38:09,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:38:09,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 23:38:09,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:38:09,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4282 [2020-10-14 23:38:09,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:38:09,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:38:09,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 23:38:09,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:38:09,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 23:38:09,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:38:10,587 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2020-10-14 23:38:10,722 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-14 23:38:10,868 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-14 23:38:11,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:38:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:38:11,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:38:11,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:38:11,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:38:11,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:38:11,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:38:11,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:38:11,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:38:11,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:38:11,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:38:11,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:38:11,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:38:11,752 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:38:11,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146580102] [2020-10-14 23:38:11,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:38:11,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 23:38:11,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191724199] [2020-10-14 23:38:11,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 23:38:11,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:38:11,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 23:38:11,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:38:11,754 INFO L87 Difference]: Start difference. First operand 144 states and 160 transitions. Second operand 26 states. [2020-10-14 23:38:12,529 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-10-14 23:38:12,744 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-14 23:38:13,053 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-10-14 23:38:13,308 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 74 [2020-10-14 23:38:13,690 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 93 [2020-10-14 23:38:14,094 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 87 [2020-10-14 23:38:14,552 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-10-14 23:38:16,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:38:16,322 INFO L93 Difference]: Finished difference Result 177 states and 199 transitions. [2020-10-14 23:38:16,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 23:38:16,323 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 65 [2020-10-14 23:38:16,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:38:16,324 INFO L225 Difference]: With dead ends: 177 [2020-10-14 23:38:16,324 INFO L226 Difference]: Without dead ends: 172 [2020-10-14 23:38:16,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=403, Invalid=3257, Unknown=0, NotChecked=0, Total=3660 [2020-10-14 23:38:16,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-14 23:38:16,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 149. [2020-10-14 23:38:16,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-14 23:38:16,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 165 transitions. [2020-10-14 23:38:16,350 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 165 transitions. Word has length 65 [2020-10-14 23:38:16,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:38:16,351 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 165 transitions. [2020-10-14 23:38:16,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 23:38:16,351 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 165 transitions. [2020-10-14 23:38:16,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 23:38:16,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:38:16,352 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:38:16,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 23:38:16,352 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:38:16,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:38:16,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1705341423, now seen corresponding path program 6 times [2020-10-14 23:38:16,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:38:16,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617471468] [2020-10-14 23:38:16,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:38:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:38:16,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:38:18,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:38:18,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 23:38:18,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:38:18,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2004 [2020-10-14 23:38:18,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:38:18,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:38:18,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 23:38:18,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:38:18,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-14 23:38:18,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:38:19,002 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-14 23:38:19,290 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-14 23:38:20,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:38:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:38:20,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:38:20,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:38:20,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:38:20,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:38:20,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:38:20,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:38:20,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:38:20,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:38:20,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:38:20,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:38:20,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:38:20,668 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:38:20,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617471468] [2020-10-14 23:38:20,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:38:20,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 23:38:20,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913619073] [2020-10-14 23:38:20,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 23:38:20,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:38:20,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 23:38:20,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:38:20,669 INFO L87 Difference]: Start difference. First operand 149 states and 165 transitions. Second operand 31 states. [2020-10-14 23:38:21,345 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-10-14 23:38:21,519 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-10-14 23:38:21,838 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 69 [2020-10-14 23:38:22,074 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 75 [2020-10-14 23:38:22,431 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 99 [2020-10-14 23:38:22,826 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 90 [2020-10-14 23:38:23,297 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-10-14 23:38:25,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:38:25,249 INFO L93 Difference]: Finished difference Result 172 states and 191 transitions. [2020-10-14 23:38:25,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 23:38:25,250 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 65 [2020-10-14 23:38:25,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:38:25,251 INFO L225 Difference]: With dead ends: 172 [2020-10-14 23:38:25,251 INFO L226 Difference]: Without dead ends: 170 [2020-10-14 23:38:25,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=329, Invalid=3331, Unknown=0, NotChecked=0, Total=3660 [2020-10-14 23:38:25,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-14 23:38:25,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 151. [2020-10-14 23:38:25,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-14 23:38:25,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 168 transitions. [2020-10-14 23:38:25,273 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 168 transitions. Word has length 65 [2020-10-14 23:38:25,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:38:25,274 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 168 transitions. [2020-10-14 23:38:25,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 23:38:25,274 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 168 transitions. [2020-10-14 23:38:25,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 23:38:25,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:38:25,275 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:38:25,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 23:38:25,275 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:38:25,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:38:25,276 INFO L82 PathProgramCache]: Analyzing trace with hash -298132155, now seen corresponding path program 5 times [2020-10-14 23:38:25,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:38:25,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394693805] [2020-10-14 23:38:25,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:38:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:38:25,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:38:26,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:38:26,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:38:28,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:38:28,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:38:29,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:38:30,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:38:30,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 23:38:30,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:38:30,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 23:38:30,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:38:30,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:38:30,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 23:38:30,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:38:30,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 23:38:30,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:38:32,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:38:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:38:32,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:38:32,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:38:32,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:38:32,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:38:32,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:38:32,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:38:32,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:38:32,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:38:32,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:38:32,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:38:32,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:38:32,110 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 7 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-14 23:38:32,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394693805] [2020-10-14 23:38:32,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:38:32,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 23:38:32,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090518578] [2020-10-14 23:38:32,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 23:38:32,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:38:32,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 23:38:32,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:38:32,111 INFO L87 Difference]: Start difference. First operand 151 states and 168 transitions. Second operand 26 states. [2020-10-14 23:38:32,697 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-10-14 23:38:33,290 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 80 [2020-10-14 23:38:33,578 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2020-10-14 23:38:35,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:38:35,169 INFO L93 Difference]: Finished difference Result 163 states and 177 transitions. [2020-10-14 23:38:35,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 23:38:35,170 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 66 [2020-10-14 23:38:35,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:38:35,171 INFO L225 Difference]: With dead ends: 163 [2020-10-14 23:38:35,171 INFO L226 Difference]: Without dead ends: 130 [2020-10-14 23:38:35,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=206, Invalid=1956, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 23:38:35,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-14 23:38:35,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 122. [2020-10-14 23:38:35,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-14 23:38:35,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 137 transitions. [2020-10-14 23:38:35,193 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 137 transitions. Word has length 66 [2020-10-14 23:38:35,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:38:35,194 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 137 transitions. [2020-10-14 23:38:35,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 23:38:35,194 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 137 transitions. [2020-10-14 23:38:35,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 23:38:35,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:38:35,195 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:38:35,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 23:38:35,195 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:38:35,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:38:35,195 INFO L82 PathProgramCache]: Analyzing trace with hash -337304010, now seen corresponding path program 11 times [2020-10-14 23:38:35,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:38:35,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550838650] [2020-10-14 23:38:35,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:38:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:38:35,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:38:36,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:38:37,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:38:37,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 23:38:37,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:38:37,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2588 [2020-10-14 23:38:37,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:38:37,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:38:37,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 23:38:37,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:38:37,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 23:38:37,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:38:38,187 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-10-14 23:38:38,416 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-14 23:38:38,742 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2020-10-14 23:38:38,901 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-10-14 23:38:39,077 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2020-10-14 23:38:39,256 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2020-10-14 23:38:39,405 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2020-10-14 23:38:39,577 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2020-10-14 23:38:39,756 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2020-10-14 23:38:40,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:38:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:38:40,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:38:40,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:38:40,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:38:40,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:38:40,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:38:40,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:38:40,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:38:40,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:38:40,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:38:40,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:38:40,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:38:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 17 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:38:40,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550838650] [2020-10-14 23:38:40,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:38:40,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 23:38:40,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097319167] [2020-10-14 23:38:40,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 23:38:40,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:38:40,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 23:38:40,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=687, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:38:40,747 INFO L87 Difference]: Start difference. First operand 122 states and 137 transitions. Second operand 28 states. [2020-10-14 23:38:41,017 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-14 23:38:41,551 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-10-14 23:38:41,780 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-10-14 23:38:42,072 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2020-10-14 23:38:42,509 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 95 [2020-10-14 23:38:42,808 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 96 [2020-10-14 23:38:43,269 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 77 [2020-10-14 23:38:43,502 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 60 [2020-10-14 23:38:43,825 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 109 [2020-10-14 23:38:44,123 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 81 [2020-10-14 23:38:44,345 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2020-10-14 23:38:44,547 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-14 23:38:45,139 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-14 23:38:45,753 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-14 23:38:45,948 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-10-14 23:38:46,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:38:46,150 INFO L93 Difference]: Finished difference Result 141 states and 160 transitions. [2020-10-14 23:38:46,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 23:38:46,151 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 66 [2020-10-14 23:38:46,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:38:46,152 INFO L225 Difference]: With dead ends: 141 [2020-10-14 23:38:46,152 INFO L226 Difference]: Without dead ends: 122 [2020-10-14 23:38:46,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=266, Invalid=2596, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 23:38:46,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-14 23:38:46,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 117. [2020-10-14 23:38:46,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-14 23:38:46,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 130 transitions. [2020-10-14 23:38:46,173 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 130 transitions. Word has length 66 [2020-10-14 23:38:46,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:38:46,174 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 130 transitions. [2020-10-14 23:38:46,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 23:38:46,174 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 130 transitions. [2020-10-14 23:38:46,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 23:38:46,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:38:46,175 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:38:46,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 23:38:46,175 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:38:46,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:38:46,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1222552125, now seen corresponding path program 12 times [2020-10-14 23:38:46,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:38:46,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345702873] [2020-10-14 23:38:46,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:38:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:38:46,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:38:47,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:38:50,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:38:50,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 23:38:50,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:38:50,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4353 [2020-10-14 23:38:50,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:38:50,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:38:50,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 23:38:50,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:38:50,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 23:38:50,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:38:51,244 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2020-10-14 23:38:51,367 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-10-14 23:38:51,522 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-10-14 23:38:51,800 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 59 [2020-10-14 23:38:51,996 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2020-10-14 23:38:52,325 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-10-14 23:38:52,484 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-10-14 23:38:52,719 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-10-14 23:38:52,879 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-10-14 23:38:53,558 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-10-14 23:38:54,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:38:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:38:54,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:38:54,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:38:54,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:38:54,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:38:54,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:38:54,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:38:54,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:38:54,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:38:54,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:38:54,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:38:54,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:38:54,079 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:38:54,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345702873] [2020-10-14 23:38:54,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:38:54,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 23:38:54,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778827378] [2020-10-14 23:38:54,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 23:38:54,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:38:54,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 23:38:54,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=788, Unknown=0, NotChecked=0, Total=870 [2020-10-14 23:38:54,081 INFO L87 Difference]: Start difference. First operand 117 states and 130 transitions. Second operand 30 states. [2020-10-14 23:38:55,093 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 54 [2020-10-14 23:38:55,302 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 45 [2020-10-14 23:38:55,495 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-14 23:38:55,710 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2020-10-14 23:38:56,139 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 61 [2020-10-14 23:38:56,470 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 82 [2020-10-14 23:38:56,735 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 68 [2020-10-14 23:38:57,366 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 93 [2020-10-14 23:38:57,948 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 53 [2020-10-14 23:38:58,181 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 51 [2020-10-14 23:38:58,540 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 72 [2020-10-14 23:38:59,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:38:59,784 INFO L93 Difference]: Finished difference Result 166 states and 186 transitions. [2020-10-14 23:38:59,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 23:38:59,785 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 66 [2020-10-14 23:38:59,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:38:59,786 INFO L225 Difference]: With dead ends: 166 [2020-10-14 23:38:59,786 INFO L226 Difference]: Without dead ends: 153 [2020-10-14 23:38:59,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=345, Invalid=2961, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 23:38:59,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-14 23:38:59,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 139. [2020-10-14 23:38:59,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-14 23:38:59,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 153 transitions. [2020-10-14 23:38:59,810 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 153 transitions. Word has length 66 [2020-10-14 23:38:59,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:38:59,811 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 153 transitions. [2020-10-14 23:38:59,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 23:38:59,811 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 153 transitions. [2020-10-14 23:38:59,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 23:38:59,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:38:59,812 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:38:59,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 23:38:59,812 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:38:59,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:38:59,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1846074140, now seen corresponding path program 9 times [2020-10-14 23:38:59,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:38:59,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794375141] [2020-10-14 23:38:59,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:38:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:38:59,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:39:01,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:39:03,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:39:03,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 23:39:03,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:39:03,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3718 [2020-10-14 23:39:03,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:39:03,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:39:03,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 23:39:03,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:39:03,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 23:39:03,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:39:04,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:39:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:39:04,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:39:04,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:39:04,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:39:04,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:39:04,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:39:04,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:39:04,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:39:04,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:39:04,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:39:04,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:39:04,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:39:04,371 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-14 23:39:04,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794375141] [2020-10-14 23:39:04,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:39:04,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:39:04,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451946645] [2020-10-14 23:39:04,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:39:04,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:39:04,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:39:04,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:39:04,372 INFO L87 Difference]: Start difference. First operand 139 states and 153 transitions. Second operand 22 states. [2020-10-14 23:39:04,983 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2020-10-14 23:39:05,142 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-14 23:39:05,300 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2020-10-14 23:39:06,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:39:06,820 INFO L93 Difference]: Finished difference Result 179 states and 198 transitions. [2020-10-14 23:39:06,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 23:39:06,821 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-10-14 23:39:06,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:39:06,823 INFO L225 Difference]: With dead ends: 179 [2020-10-14 23:39:06,823 INFO L226 Difference]: Without dead ends: 174 [2020-10-14 23:39:06,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=260, Invalid=1632, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 23:39:06,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-14 23:39:06,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 146. [2020-10-14 23:39:06,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-14 23:39:06,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 162 transitions. [2020-10-14 23:39:06,852 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 162 transitions. Word has length 67 [2020-10-14 23:39:06,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:39:06,853 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 162 transitions. [2020-10-14 23:39:06,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:39:06,853 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 162 transitions. [2020-10-14 23:39:06,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 23:39:06,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:39:06,854 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:39:06,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 23:39:06,854 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:39:06,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:39:06,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1844364118, now seen corresponding path program 7 times [2020-10-14 23:39:06,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:39:06,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6692254] [2020-10-14 23:39:06,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:39:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:39:06,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking...