/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=BIGGEST --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-ext2-properties/simple_search_value-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:44:28,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:44:28,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:44:28,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:44:28,784 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:44:28,793 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:44:28,795 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:44:28,798 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:44:28,800 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:44:28,803 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:44:28,804 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:44:28,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:44:28,805 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:44:28,808 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:44:28,811 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:44:28,813 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:44:28,815 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:44:28,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:44:28,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:44:28,825 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:44:28,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:44:28,829 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:44:28,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:44:28,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:44:28,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:44:28,844 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:44:28,844 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:44:28,851 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:44:28,852 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:44:28,853 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:44:28,853 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:44:28,854 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:44:28,857 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:44:28,858 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:44:28,858 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:44:28,859 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:44:28,863 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:44:28,863 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:44:28,863 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:44:28,864 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:44:28,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:44:28,867 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 [2020-10-12 15:44:28,910 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:44:28,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:44:28,912 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:44:28,912 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:44:28,913 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:44:28,913 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:44:28,913 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:44:28,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:44:28,914 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:44:28,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:44:28,915 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:44:28,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:44:28,915 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:44:28,916 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:44:28,916 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:44:28,916 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:44:28,917 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:44:28,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:44:28,917 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:44:28,917 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:44:28,918 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:44:28,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:44:28,918 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:44:28,918 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:44:28,918 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:44:28,919 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:44:28,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:44:28,919 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:44:28,919 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:44:28,919 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 15:44:29,267 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:44:29,281 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:44:29,289 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:44:29,291 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:44:29,292 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:44:29,292 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/simple_search_value-2.i [2020-10-12 15:44:29,382 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6ac96c667/759cf829eaba40ab9cf2c3ff5cf37aeb/FLAGb5d66f065 [2020-10-12 15:44:29,936 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:44:29,937 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/simple_search_value-2.i [2020-10-12 15:44:29,949 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6ac96c667/759cf829eaba40ab9cf2c3ff5cf37aeb/FLAGb5d66f065 [2020-10-12 15:44:30,306 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6ac96c667/759cf829eaba40ab9cf2c3ff5cf37aeb [2020-10-12 15:44:30,317 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:44:30,319 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:44:30,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:44:30,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:44:30,324 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:44:30,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:44:30" (1/1) ... [2020-10-12 15:44:30,329 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fdd68f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:30, skipping insertion in model container [2020-10-12 15:44:30,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:44:30" (1/1) ... [2020-10-12 15:44:30,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:44:30,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:44:30,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:44:30,841 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:44:30,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:44:30,942 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:44:30,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:30 WrapperNode [2020-10-12 15:44:30,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:44:30,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:44:30,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:44:30,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:44:30,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:30" (1/1) ... [2020-10-12 15:44:30,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:30" (1/1) ... [2020-10-12 15:44:30,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:30" (1/1) ... [2020-10-12 15:44:30,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:30" (1/1) ... [2020-10-12 15:44:30,992 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:30" (1/1) ... [2020-10-12 15:44:30,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:30" (1/1) ... [2020-10-12 15:44:31,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:30" (1/1) ... [2020-10-12 15:44:31,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:44:31,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:44:31,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:44:31,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:44:31,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:30" (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 [2020-10-12 15:44:31,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:44:31,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:44:31,075 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-12 15:44:31,075 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-12 15:44:31,075 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-12 15:44:31,075 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:44:31,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:44:31,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 15:44:31,076 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-12 15:44:31,076 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-12 15:44:31,076 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-12 15:44:31,077 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-12 15:44:31,077 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-12 15:44:31,077 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-12 15:44:31,077 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-12 15:44:31,077 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-12 15:44:31,077 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-12 15:44:31,078 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-12 15:44:31,078 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-12 15:44:31,078 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-12 15:44:31,078 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-12 15:44:31,078 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-12 15:44:31,079 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-12 15:44:31,079 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-12 15:44:31,079 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-12 15:44:31,079 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-12 15:44:31,079 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-12 15:44:31,080 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-12 15:44:31,080 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-12 15:44:31,080 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-12 15:44:31,080 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-12 15:44:31,080 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-12 15:44:31,080 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-12 15:44:31,081 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-12 15:44:31,081 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-12 15:44:31,081 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-12 15:44:31,081 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-12 15:44:31,081 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-12 15:44:31,081 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-12 15:44:31,082 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-12 15:44:31,082 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-12 15:44:31,082 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-12 15:44:31,082 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-12 15:44:31,082 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-12 15:44:31,082 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-12 15:44:31,083 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-12 15:44:31,083 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-12 15:44:31,083 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-12 15:44:31,083 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-12 15:44:31,083 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-12 15:44:31,083 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-12 15:44:31,084 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-12 15:44:31,084 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-12 15:44:31,084 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-12 15:44:31,084 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-12 15:44:31,084 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-12 15:44:31,084 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-12 15:44:31,084 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-12 15:44:31,085 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-12 15:44:31,085 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-12 15:44:31,085 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 15:44:31,085 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-12 15:44:31,085 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-12 15:44:31,085 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-12 15:44:31,086 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-12 15:44:31,086 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-12 15:44:31,086 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-12 15:44:31,086 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-12 15:44:31,086 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-12 15:44:31,086 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 15:44:31,087 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-12 15:44:31,087 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-12 15:44:31,087 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-12 15:44:31,087 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 15:44:31,087 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-12 15:44:31,087 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-12 15:44:31,087 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-12 15:44:31,088 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-12 15:44:31,088 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-12 15:44:31,088 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-12 15:44:31,088 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-12 15:44:31,088 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-12 15:44:31,088 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-12 15:44:31,089 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-12 15:44:31,089 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-12 15:44:31,089 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-12 15:44:31,089 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-12 15:44:31,089 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-12 15:44:31,089 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-12 15:44:31,089 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-12 15:44:31,090 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-12 15:44:31,090 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-12 15:44:31,090 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-12 15:44:31,090 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-12 15:44:31,090 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-12 15:44:31,090 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-12 15:44:31,090 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-12 15:44:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-12 15:44:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-12 15:44:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-12 15:44:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-12 15:44:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-12 15:44:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-12 15:44:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-12 15:44:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-12 15:44:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-12 15:44:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-12 15:44:31,092 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-12 15:44:31,092 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-12 15:44:31,092 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-12 15:44:31,092 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-12 15:44:31,092 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-12 15:44:31,092 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-12 15:44:31,092 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-12 15:44:31,092 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:44:31,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 15:44:31,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 15:44:31,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-12 15:44:31,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-12 15:44:31,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 15:44:31,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:44:31,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:44:31,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 15:44:31,427 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-12 15:44:31,579 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:44:31,579 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 15:44:31,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:44:31 BoogieIcfgContainer [2020-10-12 15:44:31,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:44:31,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:44:31,585 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:44:31,588 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:44:31,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:44:30" (1/3) ... [2020-10-12 15:44:31,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a7a9ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:44:31, skipping insertion in model container [2020-10-12 15:44:31,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:30" (2/3) ... [2020-10-12 15:44:31,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a7a9ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:44:31, skipping insertion in model container [2020-10-12 15:44:31,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:44:31" (3/3) ... [2020-10-12 15:44:31,592 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_search_value-2.i [2020-10-12 15:44:31,604 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:44:31,611 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:44:31,627 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:44:31,651 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:44:31,652 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:44:31,652 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:44:31,652 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:44:31,652 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:44:31,652 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:44:31,653 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:44:31,653 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:44:31,669 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-12 15:44:31,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 15:44:31,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:31,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:31,677 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:31,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:31,682 INFO L82 PathProgramCache]: Analyzing trace with hash -2052998842, now seen corresponding path program 1 times [2020-10-12 15:44:31,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:31,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26781041] [2020-10-12 15:44:31,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:31,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:31,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:31,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:31,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:32,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:32,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 15:44:32,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:44:32,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 387 [2020-10-12 15:44:32,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:32,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 15:44:32,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 15:44:32,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 15:44:32,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:44:32,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:32,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:32,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:32,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:32,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:32,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:32,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:44:32,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:32,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:32,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:32,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:32,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:32,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:32,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26781041] [2020-10-12 15:44:32,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:44:32,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 15:44:32,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614382405] [2020-10-12 15:44:32,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 15:44:32,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:32,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 15:44:32,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 15:44:32,324 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 5 states. [2020-10-12 15:44:32,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:32,475 INFO L93 Difference]: Finished difference Result 55 states and 74 transitions. [2020-10-12 15:44:32,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 15:44:32,477 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-12 15:44:32,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:32,487 INFO L225 Difference]: With dead ends: 55 [2020-10-12 15:44:32,488 INFO L226 Difference]: Without dead ends: 29 [2020-10-12 15:44:32,492 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 [2020-10-12 15:44:32,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-12 15:44:32,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2020-10-12 15:44:32,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-12 15:44:32,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-10-12 15:44:32,538 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2020-10-12 15:44:32,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:32,539 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-10-12 15:44:32,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 15:44:32,539 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-10-12 15:44:32,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 15:44:32,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:32,541 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:32,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:44:32,541 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:32,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:32,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1621988247, now seen corresponding path program 1 times [2020-10-12 15:44:32,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:32,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668668461] [2020-10-12 15:44:32,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:32,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:32,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:32,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:32,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:32,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:32,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:33,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:33,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:33,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 15:44:33,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:44:33,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 942 [2020-10-12 15:44:33,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:33,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:44:33,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:44:33,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:44:33,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:33,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:33,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:33,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:33,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:33,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:33,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:33,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:44:33,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:33,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:33,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:33,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:33,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:44:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:33,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668668461] [2020-10-12 15:44:33,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:44:33,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 15:44:33,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784432066] [2020-10-12 15:44:33,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 15:44:33,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:33,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 15:44:33,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 15:44:33,601 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2020-10-12 15:44:33,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:33,791 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2020-10-12 15:44:33,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 15:44:33,792 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-12 15:44:33,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:33,794 INFO L225 Difference]: With dead ends: 42 [2020-10-12 15:44:33,794 INFO L226 Difference]: Without dead ends: 34 [2020-10-12 15:44:33,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:44:33,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-12 15:44:33,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2020-10-12 15:44:33,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-12 15:44:33,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-10-12 15:44:33,815 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 20 [2020-10-12 15:44:33,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:33,816 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-10-12 15:44:33,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 15:44:33,821 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-10-12 15:44:33,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 15:44:33,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:33,822 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:33,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:44:33,823 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:33,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:33,823 INFO L82 PathProgramCache]: Analyzing trace with hash -897971687, now seen corresponding path program 1 times [2020-10-12 15:44:33,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:33,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456188921] [2020-10-12 15:44:33,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:33,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:33,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:33,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:34,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:34,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 15:44:34,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:44:34,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-12 15:44:34,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:34,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:44:34,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:44:34,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 15:44:34,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:34,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:34,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:34,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:34,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:34,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:34,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:34,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:44:34,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:34,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:34,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:34,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:34,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:34,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456188921] [2020-10-12 15:44:34,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:44:34,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 15:44:34,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929576924] [2020-10-12 15:44:34,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 15:44:34,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:34,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 15:44:34,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 15:44:34,070 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 6 states. [2020-10-12 15:44:34,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:34,186 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-10-12 15:44:34,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 15:44:34,187 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-12 15:44:34,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:34,188 INFO L225 Difference]: With dead ends: 42 [2020-10-12 15:44:34,188 INFO L226 Difference]: Without dead ends: 34 [2020-10-12 15:44:34,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:44:34,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-12 15:44:34,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-10-12 15:44:34,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-12 15:44:34,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-10-12 15:44:34,197 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 20 [2020-10-12 15:44:34,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:34,197 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-10-12 15:44:34,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 15:44:34,198 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-10-12 15:44:34,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 15:44:34,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:34,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:34,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:44:34,199 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:34,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:34,200 INFO L82 PathProgramCache]: Analyzing trace with hash -896124645, now seen corresponding path program 1 times [2020-10-12 15:44:34,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:34,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761133018] [2020-10-12 15:44:34,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:34,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:34,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:34,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:34,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:34,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 15:44:34,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:44:34,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-12 15:44:34,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:34,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 15:44:34,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:44:34,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 15:44:34,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:34,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:34,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:34,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:34,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:34,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:34,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:34,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:34,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:34,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:34,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:34,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:34,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:44:34,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761133018] [2020-10-12 15:44:34,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:44:34,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 15:44:34,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543889001] [2020-10-12 15:44:34,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 15:44:34,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:34,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 15:44:34,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 15:44:34,328 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 5 states. [2020-10-12 15:44:34,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:34,402 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2020-10-12 15:44:34,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 15:44:34,402 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-12 15:44:34,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:34,403 INFO L225 Difference]: With dead ends: 50 [2020-10-12 15:44:34,403 INFO L226 Difference]: Without dead ends: 29 [2020-10-12 15:44:34,404 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 [2020-10-12 15:44:34,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-12 15:44:34,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-10-12 15:44:34,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-12 15:44:34,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-12 15:44:34,410 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-10-12 15:44:34,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:34,410 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-12 15:44:34,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 15:44:34,410 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-12 15:44:34,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 15:44:34,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:34,412 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] [2020-10-12 15:44:34,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:44:34,412 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:34,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:34,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1130545059, now seen corresponding path program 1 times [2020-10-12 15:44:34,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:34,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442913093] [2020-10-12 15:44:34,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:34,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:34,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:34,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:34,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:34,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:35,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:35,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:35,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:36,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:36,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 15:44:36,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 15:44:36,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1904 [2020-10-12 15:44:36,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:36,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:44:36,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:44:36,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:44:36,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:36,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:36,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:36,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:36,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:36,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:36,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:36,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:36,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:36,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:36,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:36,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:36,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:36,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:36,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442913093] [2020-10-12 15:44:36,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:36,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:44:36,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343289590] [2020-10-12 15:44:36,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:44:36,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:36,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:44:36,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:44:36,620 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 10 states. [2020-10-12 15:44:36,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:36,866 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-10-12 15:44:36,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:44:36,867 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-12 15:44:36,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:36,868 INFO L225 Difference]: With dead ends: 50 [2020-10-12 15:44:36,868 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 15:44:36,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:44:36,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 15:44:36,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2020-10-12 15:44:36,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 15:44:36,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-10-12 15:44:36,879 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 25 [2020-10-12 15:44:36,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:36,879 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-10-12 15:44:36,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:44:36,879 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-10-12 15:44:36,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 15:44:36,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:36,880 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] [2020-10-12 15:44:36,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 15:44:36,881 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:36,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:36,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1128698017, now seen corresponding path program 1 times [2020-10-12 15:44:36,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:36,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28626682] [2020-10-12 15:44:36,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:36,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:36,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:36,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:37,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:37,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:37,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:37,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 15:44:37,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:44:37,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 693 [2020-10-12 15:44:37,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:37,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:44:37,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:44:37,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:44:37,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:44:37,886 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2020-10-12 15:44:38,033 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-12 15:44:38,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:38,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:38,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:38,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:38,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:38,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:44:38,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:38,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:38,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:38,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:38,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:44:38,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:38,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28626682] [2020-10-12 15:44:38,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:38,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:44:38,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900091422] [2020-10-12 15:44:38,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:44:38,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:38,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:44:38,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:44:38,240 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 10 states. [2020-10-12 15:44:38,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:38,533 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2020-10-12 15:44:38,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:44:38,533 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-12 15:44:38,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:38,535 INFO L225 Difference]: With dead ends: 55 [2020-10-12 15:44:38,535 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 15:44:38,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:44:38,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 15:44:38,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-12 15:44:38,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 15:44:38,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-10-12 15:44:38,542 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 25 [2020-10-12 15:44:38,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:38,542 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-10-12 15:44:38,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:44:38,543 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-10-12 15:44:38,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 15:44:38,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:38,544 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] [2020-10-12 15:44:38,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 15:44:38,544 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:38,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:38,544 INFO L82 PathProgramCache]: Analyzing trace with hash 646309345, now seen corresponding path program 1 times [2020-10-12 15:44:38,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:38,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274278898] [2020-10-12 15:44:38,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:38,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:38,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:38,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:38,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:38,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 15:44:38,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:44:38,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-12 15:44:38,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:38,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:44:38,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:44:38,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:44:38,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:38,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:38,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:38,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:38,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:38,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:38,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:38,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:44:38,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:38,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:38,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:38,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:38,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:44:38,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:38,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274278898] [2020-10-12 15:44:38,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:38,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:44:38,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006092411] [2020-10-12 15:44:38,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:44:38,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:38,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:44:38,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:44:38,880 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 9 states. [2020-10-12 15:44:39,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:39,091 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2020-10-12 15:44:39,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:44:39,092 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-12 15:44:39,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:39,093 INFO L225 Difference]: With dead ends: 57 [2020-10-12 15:44:39,093 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 15:44:39,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:44:39,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 15:44:39,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-10-12 15:44:39,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 15:44:39,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-10-12 15:44:39,100 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 25 [2020-10-12 15:44:39,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:39,100 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-10-12 15:44:39,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:44:39,101 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-10-12 15:44:39,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:44:39,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:39,102 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:39,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 15:44:39,102 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:39,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:39,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1907039335, now seen corresponding path program 2 times [2020-10-12 15:44:39,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:39,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517734945] [2020-10-12 15:44:39,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:39,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:39,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:39,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:39,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:39,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:39,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:39,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:40,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:41,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:41,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 15:44:41,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:44:41,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2238 [2020-10-12 15:44:41,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:41,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:44:41,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:44:41,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:44:41,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:41,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:41,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:41,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:41,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:41,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:41,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:44:41,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:41,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:41,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:41,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:41,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:41,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517734945] [2020-10-12 15:44:41,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:41,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:44:41,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962604666] [2020-10-12 15:44:41,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:44:41,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:41,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:44:41,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:44:41,773 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 12 states. [2020-10-12 15:44:42,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:42,147 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2020-10-12 15:44:42,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:44:42,148 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-12 15:44:42,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:42,151 INFO L225 Difference]: With dead ends: 62 [2020-10-12 15:44:42,151 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 15:44:42,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:44:42,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 15:44:42,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-10-12 15:44:42,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 15:44:42,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2020-10-12 15:44:42,160 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 30 [2020-10-12 15:44:42,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:42,160 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2020-10-12 15:44:42,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:44:42,161 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2020-10-12 15:44:42,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:44:42,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:42,162 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:42,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 15:44:42,162 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:42,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:42,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1905192293, now seen corresponding path program 2 times [2020-10-12 15:44:42,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:42,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207170965] [2020-10-12 15:44:42,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:42,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:42,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:42,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:42,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:42,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 15:44:42,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:44:42,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 512 [2020-10-12 15:44:42,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:42,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:44:42,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:44:42,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:44:42,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:42,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:42,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:42,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:42,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:42,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:42,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:42,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:42,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:42,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:42,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:42,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:42,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:42,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207170965] [2020-10-12 15:44:42,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:42,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:44:42,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097244946] [2020-10-12 15:44:42,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:44:42,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:42,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:44:42,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:44:42,831 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand 11 states. [2020-10-12 15:44:43,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:43,008 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2020-10-12 15:44:43,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:44:43,008 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-12 15:44:43,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:43,009 INFO L225 Difference]: With dead ends: 68 [2020-10-12 15:44:43,009 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 15:44:43,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:44:43,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 15:44:43,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-10-12 15:44:43,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 15:44:43,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-10-12 15:44:43,017 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 30 [2020-10-12 15:44:43,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:43,017 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-10-12 15:44:43,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:44:43,017 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-10-12 15:44:43,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:44:43,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:43,018 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:43,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 15:44:43,019 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:43,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:43,019 INFO L82 PathProgramCache]: Analyzing trace with hash -130184931, now seen corresponding path program 2 times [2020-10-12 15:44:43,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:43,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305492729] [2020-10-12 15:44:43,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:43,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:43,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:43,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:43,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 15:44:43,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:44:43,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-12 15:44:43,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:43,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:44:43,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:44:43,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:44:43,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:43,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:43,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:43,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:43,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:43,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:43,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:43,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:43,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:43,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:43,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:43,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:43,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:43,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:43,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305492729] [2020-10-12 15:44:43,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:43,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:44:43,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180318219] [2020-10-12 15:44:43,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:44:43,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:43,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:44:43,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:44:43,509 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 11 states. [2020-10-12 15:44:43,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:43,744 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2020-10-12 15:44:43,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:44:43,745 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-12 15:44:43,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:43,746 INFO L225 Difference]: With dead ends: 62 [2020-10-12 15:44:43,746 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 15:44:43,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:44:43,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 15:44:43,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2020-10-12 15:44:43,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-12 15:44:43,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-12 15:44:43,752 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 30 [2020-10-12 15:44:43,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:43,752 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-12 15:44:43,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:44:43,753 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-12 15:44:43,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:44:43,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:43,754 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:43,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 15:44:43,754 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:43,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:43,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1203369073, now seen corresponding path program 1 times [2020-10-12 15:44:43,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:43,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818770549] [2020-10-12 15:44:43,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:43,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:43,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:43,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:43,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:43,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:44,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:44,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:44,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:44,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:45,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:45,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 15:44:45,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 15:44:45,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2218 [2020-10-12 15:44:45,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:45,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:44:45,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:44:45,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:44:45,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:46,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:46,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:46,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:46,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:46,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:46,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:46,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:46,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:46,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:46,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:46,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:44:46,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:46,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818770549] [2020-10-12 15:44:46,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:46,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:44:46,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674466804] [2020-10-12 15:44:46,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:44:46,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:46,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:44:46,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:44:46,237 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 11 states. [2020-10-12 15:44:46,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:46,447 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2020-10-12 15:44:46,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:44:46,447 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-12 15:44:46,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:46,448 INFO L225 Difference]: With dead ends: 60 [2020-10-12 15:44:46,449 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 15:44:46,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:44:46,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 15:44:46,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2020-10-12 15:44:46,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 15:44:46,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2020-10-12 15:44:46,462 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 30 [2020-10-12 15:44:46,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:46,462 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2020-10-12 15:44:46,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:44:46,462 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-10-12 15:44:46,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:44:46,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:46,465 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:46,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 15:44:46,466 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:46,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:46,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1201522031, now seen corresponding path program 1 times [2020-10-12 15:44:46,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:46,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807562281] [2020-10-12 15:44:46,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:46,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:46,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:46,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:46,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:46,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:47,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:47,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:47,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 15:44:47,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:44:47,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 799 [2020-10-12 15:44:47,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:47,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:44:47,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:44:47,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:44:47,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:47,581 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-10-12 15:44:47,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:47,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:47,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:47,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:47,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:47,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:47,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:47,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:47,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:47,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:47,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 15 [2020-10-12 15:44:47,711 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:47,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807562281] [2020-10-12 15:44:47,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:47,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:44:47,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504507778] [2020-10-12 15:44:47,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:44:47,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:47,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:44:47,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:44:47,713 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 11 states. [2020-10-12 15:44:48,118 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-10-12 15:44:48,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:48,200 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2020-10-12 15:44:48,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:44:48,201 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-12 15:44:48,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:48,201 INFO L225 Difference]: With dead ends: 62 [2020-10-12 15:44:48,201 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 15:44:48,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:44:48,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 15:44:48,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2020-10-12 15:44:48,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 15:44:48,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-12 15:44:48,214 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 30 [2020-10-12 15:44:48,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:48,214 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-12 15:44:48,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:44:48,214 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-12 15:44:48,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:44:48,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:48,215 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:48,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 15:44:48,216 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:48,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:48,216 INFO L82 PathProgramCache]: Analyzing trace with hash 573485331, now seen corresponding path program 1 times [2020-10-12 15:44:48,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:48,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821384118] [2020-10-12 15:44:48,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:48,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:48,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:48,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:48,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:48,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 15:44:48,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:44:48,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-12 15:44:48,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:48,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:44:48,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:44:48,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:44:48,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:48,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:48,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:48,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:48,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:48,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:48,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:48,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:48,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:48,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:48,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:48,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:48,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:44:48,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821384118] [2020-10-12 15:44:48,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:48,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:44:48,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085524275] [2020-10-12 15:44:48,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:44:48,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:48,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:44:48,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:44:48,539 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 9 states. [2020-10-12 15:44:48,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:48,786 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2020-10-12 15:44:48,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:44:48,787 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-12 15:44:48,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:48,788 INFO L225 Difference]: With dead ends: 59 [2020-10-12 15:44:48,788 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 15:44:48,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:44:48,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 15:44:48,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-10-12 15:44:48,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 15:44:48,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-10-12 15:44:48,800 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 30 [2020-10-12 15:44:48,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:48,800 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-10-12 15:44:48,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:44:48,801 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-10-12 15:44:48,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:44:48,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:48,805 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:48,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 15:44:48,805 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:48,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:48,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1596396083, now seen corresponding path program 2 times [2020-10-12 15:44:48,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:48,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833719817] [2020-10-12 15:44:48,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:48,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:48,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:48,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:48,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:48,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:49,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:49,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:49,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 15:44:49,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:44:49,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 808 [2020-10-12 15:44:49,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:49,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:44:49,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:44:49,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:44:49,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:49,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:49,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:49,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:49,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:49,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:49,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:49,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:49,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:49,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:49,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:49,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:49,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:49,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833719817] [2020-10-12 15:44:49,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:49,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:44:49,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427079138] [2020-10-12 15:44:49,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:44:49,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:49,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:44:49,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:44:49,799 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 10 states. [2020-10-12 15:44:50,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:50,050 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2020-10-12 15:44:50,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:44:50,051 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-12 15:44:50,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:50,052 INFO L225 Difference]: With dead ends: 59 [2020-10-12 15:44:50,052 INFO L226 Difference]: Without dead ends: 51 [2020-10-12 15:44:50,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:44:50,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-12 15:44:50,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-10-12 15:44:50,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-12 15:44:50,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-10-12 15:44:50,065 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 30 [2020-10-12 15:44:50,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:50,065 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-10-12 15:44:50,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:44:50,066 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-10-12 15:44:50,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:44:50,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:50,066 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:50,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 15:44:50,067 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:50,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:50,067 INFO L82 PathProgramCache]: Analyzing trace with hash 178611279, now seen corresponding path program 2 times [2020-10-12 15:44:50,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:50,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040563148] [2020-10-12 15:44:50,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:50,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:50,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:50,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:50,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 15:44:50,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:44:50,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-12 15:44:50,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:50,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:44:50,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:44:50,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:44:50,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:50,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:50,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:50,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:50,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:50,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:50,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:50,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:50,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:50,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:50,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:50,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:50,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:50,433 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:50,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040563148] [2020-10-12 15:44:50,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:50,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:44:50,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833775533] [2020-10-12 15:44:50,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:44:50,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:50,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:44:50,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:44:50,436 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 10 states. [2020-10-12 15:44:50,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:50,726 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2020-10-12 15:44:50,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:44:50,726 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-12 15:44:50,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:50,727 INFO L225 Difference]: With dead ends: 59 [2020-10-12 15:44:50,727 INFO L226 Difference]: Without dead ends: 51 [2020-10-12 15:44:50,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:44:50,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-12 15:44:50,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2020-10-12 15:44:50,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 15:44:50,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-12 15:44:50,733 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 30 [2020-10-12 15:44:50,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:50,733 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-12 15:44:50,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:44:50,734 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-12 15:44:50,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:44:50,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:50,734 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:50,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 15:44:50,735 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:50,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:50,735 INFO L82 PathProgramCache]: Analyzing trace with hash 180458321, now seen corresponding path program 3 times [2020-10-12 15:44:50,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:50,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705665836] [2020-10-12 15:44:50,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:50,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:50,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:50,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:50,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 15:44:50,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:50,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-12 15:44:50,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:50,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:44:50,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:44:50,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 15:44:50,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:50,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:50,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:50,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:50,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:50,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:50,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:50,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:50,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:50,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:50,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:50,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:50,832 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 15:44:50,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705665836] [2020-10-12 15:44:50,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:50,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 15:44:50,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92358366] [2020-10-12 15:44:50,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 15:44:50,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:50,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 15:44:50,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 15:44:50,834 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 6 states. [2020-10-12 15:44:50,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:50,900 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2020-10-12 15:44:50,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 15:44:50,900 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-10-12 15:44:50,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:50,901 INFO L225 Difference]: With dead ends: 71 [2020-10-12 15:44:50,901 INFO L226 Difference]: Without dead ends: 39 [2020-10-12 15:44:50,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:44:50,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-12 15:44:50,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-10-12 15:44:50,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-12 15:44:50,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-10-12 15:44:50,906 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 30 [2020-10-12 15:44:50,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:50,906 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-10-12 15:44:50,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 15:44:50,907 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-10-12 15:44:50,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 15:44:50,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:50,907 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:50,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 15:44:50,908 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:50,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:50,908 INFO L82 PathProgramCache]: Analyzing trace with hash -314634797, now seen corresponding path program 2 times [2020-10-12 15:44:50,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:50,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688469074] [2020-10-12 15:44:50,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:50,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:50,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:50,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:50,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:51,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:51,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:51,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:51,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:52,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:52,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:52,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:54,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:54,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 15:44:54,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 15:44:54,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3643 [2020-10-12 15:44:54,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:54,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:44:54,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:44:54,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:44:54,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:54,785 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2020-10-12 15:44:55,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:55,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:55,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:55,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:55,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:55,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:55,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:55,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:55,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:55,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:55,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:55,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:55,159 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:55,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688469074] [2020-10-12 15:44:55,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:55,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:44:55,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105490786] [2020-10-12 15:44:55,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:44:55,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:55,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:44:55,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:44:55,161 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 13 states. [2020-10-12 15:44:55,590 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 82 [2020-10-12 15:44:56,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:56,134 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2020-10-12 15:44:56,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:44:56,135 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-12 15:44:56,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:56,135 INFO L225 Difference]: With dead ends: 67 [2020-10-12 15:44:56,136 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 15:44:56,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:44:56,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 15:44:56,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-10-12 15:44:56,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-12 15:44:56,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-10-12 15:44:56,143 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 35 [2020-10-12 15:44:56,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:56,143 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-10-12 15:44:56,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:44:56,144 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-10-12 15:44:56,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 15:44:56,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:56,144 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:56,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 15:44:56,145 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:56,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:56,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1460372565, now seen corresponding path program 1 times [2020-10-12 15:44:56,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:56,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496550192] [2020-10-12 15:44:56,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:56,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:56,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:56,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:56,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:56,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:57,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:57,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:57,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 15:44:57,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:44:57,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1080 [2020-10-12 15:44:57,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:57,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:44:57,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:44:57,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 15:44:57,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:57,660 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2020-10-12 15:44:58,004 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 64 [2020-10-12 15:44:58,261 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-10-12 15:44:58,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:58,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:58,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:58,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:58,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:58,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:58,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:44:58,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:58,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:58,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:58,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:58,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:58,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496550192] [2020-10-12 15:44:58,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:58,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:44:58,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721660839] [2020-10-12 15:44:58,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:44:58,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:58,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:44:58,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:44:58,429 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 13 states. [2020-10-12 15:44:58,851 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 99 [2020-10-12 15:44:59,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:59,139 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2020-10-12 15:44:59,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:44:59,140 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-12 15:44:59,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:59,141 INFO L225 Difference]: With dead ends: 70 [2020-10-12 15:44:59,141 INFO L226 Difference]: Without dead ends: 57 [2020-10-12 15:44:59,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:44:59,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-12 15:44:59,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2020-10-12 15:44:59,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-12 15:44:59,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-10-12 15:44:59,148 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 35 [2020-10-12 15:44:59,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:59,148 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-10-12 15:44:59,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:44:59,148 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-10-12 15:44:59,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 15:44:59,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:59,149 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:59,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 15:44:59,149 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:59,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:59,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1462219607, now seen corresponding path program 3 times [2020-10-12 15:44:59,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:59,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589894108] [2020-10-12 15:44:59,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:59,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:59,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:59,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:59,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:59,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:59,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:59,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 15:44:59,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:44:59,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 599 [2020-10-12 15:44:59,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:59,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:44:59,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:44:59,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:44:59,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:00,326 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 61 [2020-10-12 15:45:00,864 WARN L193 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 68 [2020-10-12 15:45:01,090 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-10-12 15:45:01,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:01,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:01,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:01,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:01,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:01,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:01,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:01,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:01,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:01,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:01,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:01,347 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:01,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589894108] [2020-10-12 15:45:01,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:01,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:45:01,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001975854] [2020-10-12 15:45:01,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:45:01,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:01,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:45:01,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:45:01,349 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 13 states. [2020-10-12 15:45:01,812 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 101 [2020-10-12 15:45:02,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:02,065 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2020-10-12 15:45:02,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:45:02,065 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-12 15:45:02,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:02,066 INFO L225 Difference]: With dead ends: 65 [2020-10-12 15:45:02,066 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 15:45:02,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:45:02,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 15:45:02,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2020-10-12 15:45:02,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-12 15:45:02,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-10-12 15:45:02,073 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 35 [2020-10-12 15:45:02,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:02,073 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-10-12 15:45:02,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:45:02,073 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-10-12 15:45:02,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 15:45:02,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:02,074 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:02,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 15:45:02,075 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:02,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:02,075 INFO L82 PathProgramCache]: Analyzing trace with hash -707661807, now seen corresponding path program 3 times [2020-10-12 15:45:02,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:02,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129315425] [2020-10-12 15:45:02,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:02,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:02,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:02,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:02,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:02,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:02,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:03,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:03,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 15:45:03,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:45:03,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1148 [2020-10-12 15:45:03,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:03,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:45:03,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:45:03,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 15:45:03,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:03,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:03,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:03,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:03,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:03,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:03,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:03,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:03,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:03,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:03,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:03,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:03,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:03,459 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:03,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129315425] [2020-10-12 15:45:03,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:03,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:45:03,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760874462] [2020-10-12 15:45:03,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:45:03,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:03,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:45:03,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:45:03,462 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 12 states. [2020-10-12 15:45:03,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:03,809 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2020-10-12 15:45:03,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:45:03,809 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-12 15:45:03,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:03,810 INFO L225 Difference]: With dead ends: 70 [2020-10-12 15:45:03,810 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 15:45:03,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:45:03,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 15:45:03,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2020-10-12 15:45:03,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 15:45:03,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-10-12 15:45:03,817 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 35 [2020-10-12 15:45:03,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:03,817 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-10-12 15:45:03,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:45:03,818 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-10-12 15:45:03,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 15:45:03,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:03,818 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:03,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 15:45:03,818 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:03,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:03,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1067345555, now seen corresponding path program 4 times [2020-10-12 15:45:03,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:03,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726929325] [2020-10-12 15:45:03,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:03,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:03,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:03,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:03,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:04,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:04,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 15:45:04,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:45:04,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 355 [2020-10-12 15:45:04,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:04,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:45:04,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:45:04,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 15:45:04,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:04,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:04,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:04,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:04,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:04,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:04,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:04,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:04,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:04,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:04,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:04,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:04,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:04,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726929325] [2020-10-12 15:45:04,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:04,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:45:04,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238497456] [2020-10-12 15:45:04,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:45:04,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:04,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:45:04,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:45:04,418 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 12 states. [2020-10-12 15:45:04,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:04,827 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2020-10-12 15:45:04,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:45:04,828 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-12 15:45:04,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:04,828 INFO L225 Difference]: With dead ends: 71 [2020-10-12 15:45:04,829 INFO L226 Difference]: Without dead ends: 68 [2020-10-12 15:45:04,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:45:04,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-12 15:45:04,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2020-10-12 15:45:04,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 15:45:04,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2020-10-12 15:45:04,840 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 35 [2020-10-12 15:45:04,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:04,840 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2020-10-12 15:45:04,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:45:04,841 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2020-10-12 15:45:04,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 15:45:04,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:04,841 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:04,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 15:45:04,841 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:04,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:04,842 INFO L82 PathProgramCache]: Analyzing trace with hash -912206321, now seen corresponding path program 3 times [2020-10-12 15:45:04,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:04,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042958094] [2020-10-12 15:45:04,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:04,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:04,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:04,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:05,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:05,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:05,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:06,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:06,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:06,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:06,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:08,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:08,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 15:45:08,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 15:45:08,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3704 [2020-10-12 15:45:08,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:08,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:45:08,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:45:08,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:45:08,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:08,884 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-12 15:45:09,096 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 82 [2020-10-12 15:45:09,303 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2020-10-12 15:45:09,485 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-10-12 15:45:09,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:09,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:09,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:09,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:09,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:09,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:09,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:09,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:09,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:09,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:09,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:09,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042958094] [2020-10-12 15:45:09,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:09,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:45:09,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297023217] [2020-10-12 15:45:09,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:45:09,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:09,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:45:09,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:45:09,739 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 15 states. [2020-10-12 15:45:10,243 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 89 [2020-10-12 15:45:10,518 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2020-10-12 15:45:11,035 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 140 [2020-10-12 15:45:11,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:11,322 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2020-10-12 15:45:11,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:45:11,326 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-12 15:45:11,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:11,326 INFO L225 Difference]: With dead ends: 84 [2020-10-12 15:45:11,327 INFO L226 Difference]: Without dead ends: 81 [2020-10-12 15:45:11,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:45:11,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-12 15:45:11,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 67. [2020-10-12 15:45:11,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 15:45:11,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-10-12 15:45:11,335 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 40 [2020-10-12 15:45:11,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:11,335 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-10-12 15:45:11,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:45:11,336 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-10-12 15:45:11,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 15:45:11,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:11,336 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-10-12 15:45:11,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 15:45:11,337 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:11,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:11,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1305233331, now seen corresponding path program 4 times [2020-10-12 15:45:11,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:11,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113601434] [2020-10-12 15:45:11,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:11,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:11,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:11,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:11,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:11,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:11,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:12,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:12,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:12,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 15:45:12,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:45:12,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1163 [2020-10-12 15:45:12,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:12,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:45:12,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:45:12,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:45:12,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:13,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:13,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:13,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:13,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:13,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:13,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:13,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:13,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:13,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:13,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:13,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:13,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:13,091 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:13,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113601434] [2020-10-12 15:45:13,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:13,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:45:13,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848857594] [2020-10-12 15:45:13,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:45:13,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:13,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:45:13,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:45:13,093 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 14 states. [2020-10-12 15:45:14,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:14,165 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2020-10-12 15:45:14,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:45:14,167 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-12 15:45:14,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:14,168 INFO L225 Difference]: With dead ends: 93 [2020-10-12 15:45:14,168 INFO L226 Difference]: Without dead ends: 81 [2020-10-12 15:45:14,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:45:14,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-12 15:45:14,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 67. [2020-10-12 15:45:14,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 15:45:14,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2020-10-12 15:45:14,177 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 40 [2020-10-12 15:45:14,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:14,177 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2020-10-12 15:45:14,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:45:14,177 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2020-10-12 15:45:14,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 15:45:14,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:14,178 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:14,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 15:45:14,178 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:14,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:14,179 INFO L82 PathProgramCache]: Analyzing trace with hash 469774031, now seen corresponding path program 5 times [2020-10-12 15:45:14,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:14,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070741000] [2020-10-12 15:45:14,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:14,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:14,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:14,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:14,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:14,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:14,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 15:45:14,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:45:14,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 423 [2020-10-12 15:45:14,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:14,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:45:14,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:45:14,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:45:14,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:14,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:14,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:14,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:14,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:14,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:14,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:14,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:45:14,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:14,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:14,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:14,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:14,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:15,002 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:15,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070741000] [2020-10-12 15:45:15,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:15,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:45:15,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358554059] [2020-10-12 15:45:15,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:45:15,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:15,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:45:15,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:45:15,004 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 14 states. [2020-10-12 15:45:15,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:15,487 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2020-10-12 15:45:15,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:45:15,488 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-12 15:45:15,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:15,489 INFO L225 Difference]: With dead ends: 88 [2020-10-12 15:45:15,489 INFO L226 Difference]: Without dead ends: 78 [2020-10-12 15:45:15,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:45:15,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-12 15:45:15,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2020-10-12 15:45:15,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-12 15:45:15,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2020-10-12 15:45:15,497 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 40 [2020-10-12 15:45:15,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:15,498 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2020-10-12 15:45:15,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:45:15,498 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2020-10-12 15:45:15,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 15:45:15,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:15,499 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:15,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 15:45:15,499 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:15,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:15,499 INFO L82 PathProgramCache]: Analyzing trace with hash 471621073, now seen corresponding path program 4 times [2020-10-12 15:45:15,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:15,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408527056] [2020-10-12 15:45:15,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:15,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:15,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:15,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:15,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:15,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 15:45:15,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:45:15,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-10-12 15:45:15,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:15,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:45:15,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:45:15,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 15:45:15,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:16,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:16,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:16,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:16,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:16,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:16,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:16,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:16,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:16,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:16,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:16,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:16,095 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:16,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408527056] [2020-10-12 15:45:16,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:16,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:45:16,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100880302] [2020-10-12 15:45:16,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:45:16,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:16,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:45:16,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:45:16,097 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand 14 states. [2020-10-12 15:45:16,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:16,619 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2020-10-12 15:45:16,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:45:16,620 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-12 15:45:16,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:16,621 INFO L225 Difference]: With dead ends: 82 [2020-10-12 15:45:16,621 INFO L226 Difference]: Without dead ends: 79 [2020-10-12 15:45:16,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:45:16,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-12 15:45:16,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2020-10-12 15:45:16,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 15:45:16,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2020-10-12 15:45:16,629 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 40 [2020-10-12 15:45:16,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:16,629 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2020-10-12 15:45:16,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:45:16,629 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2020-10-12 15:45:16,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 15:45:16,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:16,630 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:16,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 15:45:16,630 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:16,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:16,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1202395671, now seen corresponding path program 5 times [2020-10-12 15:45:16,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:16,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570196626] [2020-10-12 15:45:16,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:16,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:16,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:16,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:16,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:16,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:17,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:17,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:18,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:18,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 15:45:18,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:45:18,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1523 [2020-10-12 15:45:18,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:18,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:45:18,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:45:18,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:45:18,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:18,438 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2020-10-12 15:45:18,757 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2020-10-12 15:45:19,010 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2020-10-12 15:45:19,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:19,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:19,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:19,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:19,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:19,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:19,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:45:19,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:19,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:19,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:19,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:19,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:45:19,505 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:19,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570196626] [2020-10-12 15:45:19,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:19,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:45:19,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816745934] [2020-10-12 15:45:19,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:45:19,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:19,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:45:19,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:45:19,509 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand 14 states. [2020-10-12 15:45:19,951 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 70 [2020-10-12 15:45:20,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:20,445 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2020-10-12 15:45:20,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:45:20,446 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-12 15:45:20,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:20,447 INFO L225 Difference]: With dead ends: 88 [2020-10-12 15:45:20,447 INFO L226 Difference]: Without dead ends: 80 [2020-10-12 15:45:20,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:45:20,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-12 15:45:20,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2020-10-12 15:45:20,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-12 15:45:20,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2020-10-12 15:45:20,457 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 40 [2020-10-12 15:45:20,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:20,457 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2020-10-12 15:45:20,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:45:20,457 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2020-10-12 15:45:20,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 15:45:20,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:20,458 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:20,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 15:45:20,458 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:20,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:20,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1204242713, now seen corresponding path program 6 times [2020-10-12 15:45:20,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:20,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626866402] [2020-10-12 15:45:20,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:20,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:20,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:20,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:20,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:20,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 15:45:20,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:45:20,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 504 [2020-10-12 15:45:20,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:20,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:45:20,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:45:20,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:45:20,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:21,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:21,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:21,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:21,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:21,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:21,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:21,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:21,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:21,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:21,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:21,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:45:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-12 15:45:21,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626866402] [2020-10-12 15:45:21,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:21,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:45:21,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439898624] [2020-10-12 15:45:21,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:45:21,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:21,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:45:21,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:45:21,207 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand 11 states. [2020-10-12 15:45:21,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:21,607 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2020-10-12 15:45:21,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:45:21,608 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-10-12 15:45:21,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:21,609 INFO L225 Difference]: With dead ends: 87 [2020-10-12 15:45:21,609 INFO L226 Difference]: Without dead ends: 69 [2020-10-12 15:45:21,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:45:21,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-12 15:45:21,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-12 15:45:21,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-12 15:45:21,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2020-10-12 15:45:21,625 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 40 [2020-10-12 15:45:21,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:21,625 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2020-10-12 15:45:21,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:45:21,626 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2020-10-12 15:45:21,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 15:45:21,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:21,626 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:21,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 15:45:21,627 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:21,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:21,627 INFO L82 PathProgramCache]: Analyzing trace with hash -77468007, now seen corresponding path program 7 times [2020-10-12 15:45:21,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:21,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273134503] [2020-10-12 15:45:21,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:21,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:21,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:21,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:21,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:22,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:22,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:22,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 15:45:22,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:45:22,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 840 [2020-10-12 15:45:22,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:22,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:45:22,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:45:22,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:45:22,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:22,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:22,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:22,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:22,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:22,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:22,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:22,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:45:22,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:22,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:22,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:22,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:22,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:45:22,882 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:22,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273134503] [2020-10-12 15:45:22,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:22,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:45:22,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938552058] [2020-10-12 15:45:22,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:45:22,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:22,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:45:22,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:45:22,889 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand 13 states. [2020-10-12 15:45:23,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:23,546 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2020-10-12 15:45:23,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:45:23,547 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-12 15:45:23,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:23,548 INFO L225 Difference]: With dead ends: 87 [2020-10-12 15:45:23,549 INFO L226 Difference]: Without dead ends: 79 [2020-10-12 15:45:23,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:45:23,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-12 15:45:23,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-12 15:45:23,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-12 15:45:23,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2020-10-12 15:45:23,562 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 40 [2020-10-12 15:45:23,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:23,563 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2020-10-12 15:45:23,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:45:23,563 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2020-10-12 15:45:23,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 15:45:23,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:23,564 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 15:45:23,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 15:45:23,565 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:23,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:23,565 INFO L82 PathProgramCache]: Analyzing trace with hash -75620965, now seen corresponding path program 1 times [2020-10-12 15:45:23,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:23,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695588710] [2020-10-12 15:45:23,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:23,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:23,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:23,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 15:45:23,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:23,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-12 15:45:23,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:23,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:45:23,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:45:23,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 15:45:23,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:23,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:23,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:23,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:23,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:23,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:23,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:23,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:23,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:23,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:23,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:23,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-12 15:45:23,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695588710] [2020-10-12 15:45:23,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:23,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 15:45:23,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143612765] [2020-10-12 15:45:23,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:45:23,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:23,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:45:23,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:45:23,725 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand 7 states. [2020-10-12 15:45:23,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:23,817 INFO L93 Difference]: Finished difference Result 119 states and 142 transitions. [2020-10-12 15:45:23,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:45:23,817 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-10-12 15:45:23,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:23,818 INFO L225 Difference]: With dead ends: 119 [2020-10-12 15:45:23,818 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 15:45:23,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:45:23,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 15:45:23,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-12 15:45:23,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 15:45:23,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-10-12 15:45:23,826 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 40 [2020-10-12 15:45:23,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:23,827 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-10-12 15:45:23,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:45:23,827 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-10-12 15:45:23,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 15:45:23,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:23,827 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:23,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 15:45:23,828 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:23,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:23,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1349970085, now seen corresponding path program 8 times [2020-10-12 15:45:23,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:23,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885502877] [2020-10-12 15:45:23,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:23,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:23,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:23,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:23,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:24,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:24,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:24,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:24,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:25,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:26,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:26,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 15:45:26,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 15:45:26,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3056 [2020-10-12 15:45:26,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:26,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:45:26,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:45:26,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 15:45:26,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:27,434 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 54 [2020-10-12 15:45:27,802 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 62 [2020-10-12 15:45:28,072 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 91 [2020-10-12 15:45:28,374 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 92 [2020-10-12 15:45:28,575 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 82 [2020-10-12 15:45:28,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:28,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:28,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:28,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:28,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:28,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:28,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:28,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:28,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:28,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:28,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:28,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:29,003 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:29,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885502877] [2020-10-12 15:45:29,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:29,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:45:29,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842256482] [2020-10-12 15:45:29,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:45:29,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:29,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:45:29,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:45:29,005 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 16 states. [2020-10-12 15:45:29,609 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 125 [2020-10-12 15:45:29,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:29,891 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2020-10-12 15:45:29,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:45:29,893 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-12 15:45:29,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:29,894 INFO L225 Difference]: With dead ends: 84 [2020-10-12 15:45:29,894 INFO L226 Difference]: Without dead ends: 76 [2020-10-12 15:45:29,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:45:29,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-12 15:45:29,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-10-12 15:45:29,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-12 15:45:29,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2020-10-12 15:45:29,903 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 45 [2020-10-12 15:45:29,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:29,903 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2020-10-12 15:45:29,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:45:29,903 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2020-10-12 15:45:29,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 15:45:29,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:29,904 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:29,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 15:45:29,904 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:29,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:29,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1348123043, now seen corresponding path program 9 times [2020-10-12 15:45:29,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:29,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21206959] [2020-10-12 15:45:29,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:29,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:29,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:29,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:30,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:30,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:31,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:31,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 15:45:31,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:45:31,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1520 [2020-10-12 15:45:31,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:31,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:45:31,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:45:31,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 15:45:31,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:31,952 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 58 [2020-10-12 15:45:32,298 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 71 [2020-10-12 15:45:32,703 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 96 [2020-10-12 15:45:33,354 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 98 [2020-10-12 15:45:33,612 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 87 [2020-10-12 15:45:33,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:33,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:33,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:33,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:33,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:33,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:33,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:33,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:33,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:33,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:33,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:33,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:33,971 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:33,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21206959] [2020-10-12 15:45:33,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:33,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:45:33,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547044393] [2020-10-12 15:45:33,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:45:33,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:33,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:45:33,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:45:33,973 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand 16 states. [2020-10-12 15:45:34,346 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2020-10-12 15:45:35,036 WARN L193 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 162 [2020-10-12 15:45:35,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:35,441 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2020-10-12 15:45:35,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:45:35,441 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-12 15:45:35,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:35,443 INFO L225 Difference]: With dead ends: 84 [2020-10-12 15:45:35,443 INFO L226 Difference]: Without dead ends: 81 [2020-10-12 15:45:35,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:45:35,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-12 15:45:35,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 70. [2020-10-12 15:45:35,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-12 15:45:35,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2020-10-12 15:45:35,452 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 45 [2020-10-12 15:45:35,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:35,453 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2020-10-12 15:45:35,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:45:35,453 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2020-10-12 15:45:35,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 15:45:35,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:35,453 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:35,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 15:45:35,453 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:35,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:35,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1665133533, now seen corresponding path program 10 times [2020-10-12 15:45:35,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:35,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668949781] [2020-10-12 15:45:35,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:35,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:35,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:35,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:35,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:35,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:35,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:36,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:36,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 15:45:36,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:45:36,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 965 [2020-10-12 15:45:36,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:36,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:45:36,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:45:36,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 15:45:36,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:36,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:36,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:36,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:36,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:36,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:36,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:36,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:36,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:36,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:36,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:36,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:36,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:36,907 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:36,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668949781] [2020-10-12 15:45:36,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:36,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:45:36,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816146863] [2020-10-12 15:45:36,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:45:36,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:36,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:45:36,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:45:36,910 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 15 states. [2020-10-12 15:45:37,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:37,682 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2020-10-12 15:45:37,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:45:37,682 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-10-12 15:45:37,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:37,684 INFO L225 Difference]: With dead ends: 91 [2020-10-12 15:45:37,684 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 15:45:37,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:45:37,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 15:45:37,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 72. [2020-10-12 15:45:37,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-12 15:45:37,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2020-10-12 15:45:37,694 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 45 [2020-10-12 15:45:37,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:37,695 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2020-10-12 15:45:37,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:45:37,695 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2020-10-12 15:45:37,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 15:45:37,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:37,695 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:37,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 15:45:37,696 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:37,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:37,696 INFO L82 PathProgramCache]: Analyzing trace with hash -537618533, now seen corresponding path program 4 times [2020-10-12 15:45:37,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:37,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603501959] [2020-10-12 15:45:37,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:37,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:37,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:37,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:37,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:38,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:38,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:38,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:39,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:40,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:40,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:41,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:41,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:42,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:42,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:42,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 15:45:42,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 15:45:42,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5244 [2020-10-12 15:45:42,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:42,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:45:42,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:45:42,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 15:45:42,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:43,484 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2020-10-12 15:45:43,751 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 62 [2020-10-12 15:45:44,163 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 83 [2020-10-12 15:45:44,829 WARN L193 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 100 [2020-10-12 15:45:45,246 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 94 [2020-10-12 15:45:45,774 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 73 [2020-10-12 15:45:46,096 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 72 [2020-10-12 15:45:46,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:46,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:46,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:46,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:46,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:46,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:46,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:46,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:46,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:46,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:46,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:46,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:46,441 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:46,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603501959] [2020-10-12 15:45:46,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:46,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:45:46,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964691951] [2020-10-12 15:45:46,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:45:46,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:46,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:45:46,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:45:46,443 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand 18 states. [2020-10-12 15:45:46,871 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2020-10-12 15:45:47,423 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 109 [2020-10-12 15:45:47,789 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 93 [2020-10-12 15:45:48,353 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 137 [2020-10-12 15:45:48,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:48,735 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2020-10-12 15:45:48,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:45:48,736 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-10-12 15:45:48,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:48,737 INFO L225 Difference]: With dead ends: 107 [2020-10-12 15:45:48,737 INFO L226 Difference]: Without dead ends: 99 [2020-10-12 15:45:48,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:45:48,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-12 15:45:48,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 93. [2020-10-12 15:45:48,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-12 15:45:48,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 110 transitions. [2020-10-12 15:45:48,749 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 110 transitions. Word has length 50 [2020-10-12 15:45:48,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:48,749 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 110 transitions. [2020-10-12 15:45:48,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:45:48,749 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 110 transitions. [2020-10-12 15:45:48,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 15:45:48,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:48,750 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:48,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 15:45:48,750 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:48,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:48,751 INFO L82 PathProgramCache]: Analyzing trace with hash -535771491, now seen corresponding path program 11 times [2020-10-12 15:45:48,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:48,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017248915] [2020-10-12 15:45:48,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:48,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:48,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:48,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:48,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:49,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:49,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:49,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:50,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:51,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:51,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:52,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:53,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:53,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 15:45:53,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 15:45:53,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 15:45:53,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:53,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:45:53,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:45:53,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 15:45:53,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:54,166 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2020-10-12 15:45:54,437 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2020-10-12 15:45:54,940 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 85 [2020-10-12 15:45:55,389 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 101 [2020-10-12 15:45:55,768 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 98 [2020-10-12 15:45:56,196 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 73 [2020-10-12 15:45:56,345 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-10-12 15:45:56,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:56,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:56,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:56,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:56,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:56,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:56,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:56,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:56,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:56,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:56,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:56,751 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:56,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017248915] [2020-10-12 15:45:56,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:56,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:45:56,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630274580] [2020-10-12 15:45:56,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:45:56,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:56,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:45:56,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:45:56,753 INFO L87 Difference]: Start difference. First operand 93 states and 110 transitions. Second operand 18 states. [2020-10-12 15:45:57,286 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 87 [2020-10-12 15:45:58,105 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 128 [2020-10-12 15:45:58,549 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 99 [2020-10-12 15:45:59,190 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 129 [2020-10-12 15:45:59,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:59,677 INFO L93 Difference]: Finished difference Result 106 states and 125 transitions. [2020-10-12 15:45:59,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:45:59,678 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-10-12 15:45:59,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:59,679 INFO L225 Difference]: With dead ends: 106 [2020-10-12 15:45:59,680 INFO L226 Difference]: Without dead ends: 103 [2020-10-12 15:45:59,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:45:59,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-12 15:45:59,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 88. [2020-10-12 15:45:59,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-12 15:45:59,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2020-10-12 15:45:59,691 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 50 [2020-10-12 15:45:59,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:59,692 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2020-10-12 15:45:59,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:45:59,692 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2020-10-12 15:45:59,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 15:45:59,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:59,692 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:59,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 15:45:59,693 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:59,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:59,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1817482211, now seen corresponding path program 12 times [2020-10-12 15:45:59,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:59,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582147462] [2020-10-12 15:45:59,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:59,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:59,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:59,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:00,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:00,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:00,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:00,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:00,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:04,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:04,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 15:46:04,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 15:46:04,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 15:46:04,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:04,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:46:04,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:46:04,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 15:46:04,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:05,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:05,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:05,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:05,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:05,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:05,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:05,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:05,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:05,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:05,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:05,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:05,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:05,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582147462] [2020-10-12 15:46:05,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:05,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:46:05,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525039635] [2020-10-12 15:46:05,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:46:05,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:05,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:46:05,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:46:05,292 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand 17 states. [2020-10-12 15:46:06,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:06,237 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2020-10-12 15:46:06,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:46:06,238 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2020-10-12 15:46:06,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:06,239 INFO L225 Difference]: With dead ends: 109 [2020-10-12 15:46:06,239 INFO L226 Difference]: Without dead ends: 99 [2020-10-12 15:46:06,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:46:06,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-12 15:46:06,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 88. [2020-10-12 15:46:06,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-12 15:46:06,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 105 transitions. [2020-10-12 15:46:06,250 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 105 transitions. Word has length 50 [2020-10-12 15:46:06,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:06,251 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 105 transitions. [2020-10-12 15:46:06,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:46:06,251 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 105 transitions. [2020-10-12 15:46:06,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 15:46:06,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:06,251 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:06,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 15:46:06,251 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:06,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:06,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1815635169, now seen corresponding path program 13 times [2020-10-12 15:46:06,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:06,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873399876] [2020-10-12 15:46:06,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:06,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:06,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:06,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:06,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:07,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:07,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:09,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:09,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 15:46:09,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:46:09,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3073 [2020-10-12 15:46:09,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:09,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:46:09,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:46:09,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 15:46:09,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:09,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:09,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:09,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:09,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:09,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:09,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:09,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:09,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:09,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:09,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:09,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:09,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:09,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873399876] [2020-10-12 15:46:09,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:09,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:46:09,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419875098] [2020-10-12 15:46:09,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:46:09,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:09,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:46:09,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:46:09,970 INFO L87 Difference]: Start difference. First operand 88 states and 105 transitions. Second operand 17 states. [2020-10-12 15:46:10,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:10,936 INFO L93 Difference]: Finished difference Result 97 states and 116 transitions. [2020-10-12 15:46:10,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:46:10,937 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2020-10-12 15:46:10,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:10,938 INFO L225 Difference]: With dead ends: 97 [2020-10-12 15:46:10,938 INFO L226 Difference]: Without dead ends: 94 [2020-10-12 15:46:10,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:46:10,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-12 15:46:10,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 67. [2020-10-12 15:46:10,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 15:46:10,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2020-10-12 15:46:10,950 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 50 [2020-10-12 15:46:10,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:10,950 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2020-10-12 15:46:10,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:46:10,951 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2020-10-12 15:46:10,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 15:46:10,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:10,951 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:10,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 15:46:10,952 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:10,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:10,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1745978671, now seen corresponding path program 14 times [2020-10-12 15:46:10,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:10,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695559255] [2020-10-12 15:46:10,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:10,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:10,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:10,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:10,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:11,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:11,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:12,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:12,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:13,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:13,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:13,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 15:46:13,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 15:46:13,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2778 [2020-10-12 15:46:13,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:13,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:46:13,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:46:13,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 15:46:13,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:14,308 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 55 [2020-10-12 15:46:14,671 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 66 [2020-10-12 15:46:15,190 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2020-10-12 15:46:15,738 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 87 [2020-10-12 15:46:16,020 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 83 [2020-10-12 15:46:16,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:16,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:16,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:16,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:16,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:16,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:16,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:16,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:16,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:16,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:16,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:16,413 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 11 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:16,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695559255] [2020-10-12 15:46:16,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:16,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:46:16,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543842168] [2020-10-12 15:46:16,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:46:16,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:16,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:46:16,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:46:16,415 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 17 states. [2020-10-12 15:46:16,761 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 72 [2020-10-12 15:46:17,363 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 130 [2020-10-12 15:46:17,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:17,950 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2020-10-12 15:46:17,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:46:17,951 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2020-10-12 15:46:17,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:17,952 INFO L225 Difference]: With dead ends: 94 [2020-10-12 15:46:17,952 INFO L226 Difference]: Without dead ends: 86 [2020-10-12 15:46:17,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:46:17,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-12 15:46:17,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2020-10-12 15:46:17,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-12 15:46:17,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2020-10-12 15:46:17,964 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 50 [2020-10-12 15:46:17,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:17,964 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2020-10-12 15:46:17,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:46:17,965 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2020-10-12 15:46:17,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 15:46:17,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:17,965 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:17,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 15:46:17,966 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:17,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:17,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1744131629, now seen corresponding path program 15 times [2020-10-12 15:46:17,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:17,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889244972] [2020-10-12 15:46:17,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:17,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:17,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:17,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:18,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:18,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:18,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:19,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:19,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 15:46:19,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:46:19,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1507 [2020-10-12 15:46:19,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:19,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:46:19,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:46:19,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 15:46:19,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:19,872 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2020-10-12 15:46:20,108 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-10-12 15:46:20,578 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 87 [2020-10-12 15:46:21,228 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 87 [2020-10-12 15:46:21,557 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 86 [2020-10-12 15:46:22,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:22,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:22,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:22,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:22,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:22,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:22,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:22,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:22,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:22,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:22,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:22,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889244972] [2020-10-12 15:46:22,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:22,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:46:22,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327696827] [2020-10-12 15:46:22,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:46:22,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:22,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:46:22,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:46:22,201 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand 17 states. [2020-10-12 15:46:22,994 WARN L193 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 98 [2020-10-12 15:46:23,645 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 148 [2020-10-12 15:46:23,993 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 88 [2020-10-12 15:46:24,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:24,435 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2020-10-12 15:46:24,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:46:24,436 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2020-10-12 15:46:24,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:24,437 INFO L225 Difference]: With dead ends: 96 [2020-10-12 15:46:24,438 INFO L226 Difference]: Without dead ends: 86 [2020-10-12 15:46:24,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:46:24,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-12 15:46:24,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2020-10-12 15:46:24,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-12 15:46:24,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2020-10-12 15:46:24,448 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 50 [2020-10-12 15:46:24,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:24,449 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2020-10-12 15:46:24,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:46:24,449 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2020-10-12 15:46:24,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 15:46:24,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:24,450 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:24,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 15:46:24,450 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:24,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:24,450 INFO L82 PathProgramCache]: Analyzing trace with hash 30875733, now seen corresponding path program 16 times [2020-10-12 15:46:24,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:24,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598381771] [2020-10-12 15:46:24,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:24,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:24,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:24,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:24,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:25,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:25,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 15:46:25,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:46:25,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 745 [2020-10-12 15:46:25,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:25,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:46:25,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:46:25,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:46:25,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:25,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:25,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:25,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:25,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:25,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:25,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:25,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:25,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:25,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:25,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:25,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:25,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:25,394 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-12 15:46:25,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598381771] [2020-10-12 15:46:25,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:25,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:46:25,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066541440] [2020-10-12 15:46:25,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:46:25,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:25,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:46:25,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:46:25,396 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand 12 states. [2020-10-12 15:46:25,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:25,600 INFO L93 Difference]: Finished difference Result 102 states and 119 transitions. [2020-10-12 15:46:25,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:46:25,601 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-10-12 15:46:25,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:25,602 INFO L225 Difference]: With dead ends: 102 [2020-10-12 15:46:25,603 INFO L226 Difference]: Without dead ends: 67 [2020-10-12 15:46:25,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:46:25,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-12 15:46:25,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-12 15:46:25,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 15:46:25,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2020-10-12 15:46:25,614 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 50 [2020-10-12 15:46:25,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:25,614 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2020-10-12 15:46:25,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:46:25,614 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2020-10-12 15:46:25,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 15:46:25,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:25,614 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:25,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 15:46:25,615 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:25,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:25,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1731340175, now seen corresponding path program 17 times [2020-10-12 15:46:25,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:25,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698216124] [2020-10-12 15:46:25,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:25,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:25,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:25,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:25,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:26,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:26,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:26,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 15:46:26,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:46:26,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 919 [2020-10-12 15:46:26,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:26,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:46:26,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:46:26,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 15:46:26,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:27,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:27,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:27,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:27,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:27,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:27,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:27,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:27,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:27,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:27,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:27,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:27,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:27,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698216124] [2020-10-12 15:46:27,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:27,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:46:27,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981551593] [2020-10-12 15:46:27,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:46:27,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:27,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:46:27,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:46:27,146 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand 16 states. [2020-10-12 15:46:27,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:27,899 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2020-10-12 15:46:27,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:46:27,900 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-10-12 15:46:27,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:27,901 INFO L225 Difference]: With dead ends: 89 [2020-10-12 15:46:27,901 INFO L226 Difference]: Without dead ends: 81 [2020-10-12 15:46:27,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:46:27,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-12 15:46:27,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2020-10-12 15:46:27,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-12 15:46:27,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-10-12 15:46:27,911 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 50 [2020-10-12 15:46:27,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:27,911 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-10-12 15:46:27,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:46:27,912 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-10-12 15:46:27,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 15:46:27,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:27,912 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:27,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 15:46:27,913 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:27,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:27,913 INFO L82 PathProgramCache]: Analyzing trace with hash -788619759, now seen corresponding path program 18 times [2020-10-12 15:46:27,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:27,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020696272] [2020-10-12 15:46:27,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:27,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:27,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:27,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:28,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:28,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:28,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 15:46:28,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:46:28,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 648 [2020-10-12 15:46:28,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:28,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:46:28,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:46:28,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 15:46:28,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:29,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:29,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:29,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:29,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:29,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:29,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:29,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:29,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:29,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:29,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:29,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:29,181 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:29,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020696272] [2020-10-12 15:46:29,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:29,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:46:29,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947402145] [2020-10-12 15:46:29,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:46:29,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:29,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:46:29,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:46:29,183 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 16 states. [2020-10-12 15:46:30,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:30,178 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2020-10-12 15:46:30,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:46:30,179 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-10-12 15:46:30,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:30,180 INFO L225 Difference]: With dead ends: 89 [2020-10-12 15:46:30,180 INFO L226 Difference]: Without dead ends: 81 [2020-10-12 15:46:30,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:46:30,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-12 15:46:30,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2020-10-12 15:46:30,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-12 15:46:30,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2020-10-12 15:46:30,190 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 50 [2020-10-12 15:46:30,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:30,190 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2020-10-12 15:46:30,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:46:30,190 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2020-10-12 15:46:30,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 15:46:30,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:30,191 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:30,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 15:46:30,191 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:30,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:30,191 INFO L82 PathProgramCache]: Analyzing trace with hash -786772717, now seen corresponding path program 2 times [2020-10-12 15:46:30,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:30,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739622895] [2020-10-12 15:46:30,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:30,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:30,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:30,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:30,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 15:46:30,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:30,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-12 15:46:30,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:30,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:46:30,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:46:30,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:46:30,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:30,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:30,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:30,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:30,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:30,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:30,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:30,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:30,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:30,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:30,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:30,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-12 15:46:30,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739622895] [2020-10-12 15:46:30,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:30,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 15:46:30,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179117212] [2020-10-12 15:46:30,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:46:30,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:30,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:46:30,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:46:30,325 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 8 states. [2020-10-12 15:46:30,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:30,447 INFO L93 Difference]: Finished difference Result 111 states and 128 transitions. [2020-10-12 15:46:30,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:46:30,448 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2020-10-12 15:46:30,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:30,449 INFO L225 Difference]: With dead ends: 111 [2020-10-12 15:46:30,449 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 15:46:30,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:46:30,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 15:46:30,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2020-10-12 15:46:30,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 15:46:30,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2020-10-12 15:46:30,457 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 50 [2020-10-12 15:46:30,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:30,457 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2020-10-12 15:46:30,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:46:30,457 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2020-10-12 15:46:30,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 15:46:30,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:30,458 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:30,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 15:46:30,458 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:30,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:30,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1691562161, now seen corresponding path program 19 times [2020-10-12 15:46:30,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:30,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827311776] [2020-10-12 15:46:30,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:30,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:30,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:30,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:30,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:31,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:31,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:32,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:32,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:32,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:35,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:35,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 15:46:35,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 15:46:35,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-12 15:46:35,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:35,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:46:35,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:46:35,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 15:46:35,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:36,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:36,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:36,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:36,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:36,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:36,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:36,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:36,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:36,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:36,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:36,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 13 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:36,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827311776] [2020-10-12 15:46:36,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:36,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:46:36,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013825594] [2020-10-12 15:46:36,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:46:36,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:36,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:46:36,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:46:36,266 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 18 states. [2020-10-12 15:46:36,644 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2020-10-12 15:46:37,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:37,089 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2020-10-12 15:46:37,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:46:37,090 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2020-10-12 15:46:37,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:37,091 INFO L225 Difference]: With dead ends: 94 [2020-10-12 15:46:37,091 INFO L226 Difference]: Without dead ends: 86 [2020-10-12 15:46:37,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:46:37,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-12 15:46:37,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2020-10-12 15:46:37,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-12 15:46:37,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2020-10-12 15:46:37,102 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 55 [2020-10-12 15:46:37,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:37,102 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2020-10-12 15:46:37,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:46:37,102 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2020-10-12 15:46:37,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 15:46:37,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:37,103 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:37,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 15:46:37,103 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:37,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:37,104 INFO L82 PathProgramCache]: Analyzing trace with hash 83445201, now seen corresponding path program 20 times [2020-10-12 15:46:37,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:37,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149070115] [2020-10-12 15:46:37,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:37,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:37,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:37,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:37,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:38,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:38,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:38,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:42,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:42,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 15:46:42,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:46:42,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-12 15:46:42,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:42,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:46:42,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:46:42,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 15:46:42,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:42,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:42,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:42,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:42,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:42,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:42,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:42,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:42,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:42,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:42,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:42,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:42,942 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 7 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:42,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149070115] [2020-10-12 15:46:42,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:42,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:46:42,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508320781] [2020-10-12 15:46:42,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:46:42,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:42,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:46:42,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:46:42,944 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand 18 states. [2020-10-12 15:46:43,719 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2020-10-12 15:46:44,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:44,229 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2020-10-12 15:46:44,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:46:44,230 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2020-10-12 15:46:44,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:44,231 INFO L225 Difference]: With dead ends: 94 [2020-10-12 15:46:44,231 INFO L226 Difference]: Without dead ends: 86 [2020-10-12 15:46:44,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:46:44,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-12 15:46:44,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2020-10-12 15:46:44,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-12 15:46:44,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2020-10-12 15:46:44,241 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 55 [2020-10-12 15:46:44,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:44,241 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2020-10-12 15:46:44,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:46:44,241 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2020-10-12 15:46:44,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 15:46:44,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:44,242 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:44,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 15:46:44,242 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:44,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:44,243 INFO L82 PathProgramCache]: Analyzing trace with hash 85292243, now seen corresponding path program 21 times [2020-10-12 15:46:44,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:44,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052419543] [2020-10-12 15:46:44,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:44,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:44,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:44,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:44,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:45,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:45,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:45,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:47,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:47,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 15:46:47,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:46:47,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3709 [2020-10-12 15:46:47,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:47,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:46:47,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:46:47,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 15:46:47,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:48,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:48,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:48,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:48,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:48,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:48,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:48,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:48,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:48,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:48,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:48,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:48,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052419543] [2020-10-12 15:46:48,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:48,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:46:48,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318687424] [2020-10-12 15:46:48,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:46:48,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:48,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:46:48,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:46:48,793 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand 18 states. [2020-10-12 15:46:49,555 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-10-12 15:46:50,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:50,157 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2020-10-12 15:46:50,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 15:46:50,158 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2020-10-12 15:46:50,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:50,159 INFO L225 Difference]: With dead ends: 94 [2020-10-12 15:46:50,159 INFO L226 Difference]: Without dead ends: 91 [2020-10-12 15:46:50,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:46:50,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-12 15:46:50,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-12 15:46:50,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-12 15:46:50,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2020-10-12 15:46:50,171 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 55 [2020-10-12 15:46:50,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:50,171 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2020-10-12 15:46:50,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:46:50,171 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2020-10-12 15:46:50,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 15:46:50,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:50,172 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:50,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 15:46:50,172 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:50,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:50,173 INFO L82 PathProgramCache]: Analyzing trace with hash -256630389, now seen corresponding path program 22 times [2020-10-12 15:46:50,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:50,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780865229] [2020-10-12 15:46:50,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:50,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:50,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:50,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:50,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:50,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:50,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:52,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:52,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:52,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:53,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:55,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:55,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 15:46:55,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 15:46:55,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 15:46:55,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:55,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 15:46:55,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:46:55,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 15:46:55,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:55,646 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-10-12 15:46:55,782 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-12 15:46:56,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:56,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:56,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:56,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:56,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:56,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:56,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:56,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:56,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:56,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:56,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:56,283 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 13 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:56,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780865229] [2020-10-12 15:46:56,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:56,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 15:46:56,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592185494] [2020-10-12 15:46:56,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 15:46:56,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:56,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 15:46:56,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:46:56,284 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand 20 states. [2020-10-12 15:46:56,737 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2020-10-12 15:46:57,053 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-10-12 15:46:57,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:57,672 INFO L93 Difference]: Finished difference Result 121 states and 142 transitions. [2020-10-12 15:46:57,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 15:46:57,672 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2020-10-12 15:46:57,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:57,674 INFO L225 Difference]: With dead ends: 121 [2020-10-12 15:46:57,674 INFO L226 Difference]: Without dead ends: 113 [2020-10-12 15:46:57,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2020-10-12 15:46:57,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-12 15:46:57,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 104. [2020-10-12 15:46:57,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-12 15:46:57,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 121 transitions. [2020-10-12 15:46:57,685 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 121 transitions. Word has length 60 [2020-10-12 15:46:57,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:57,685 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 121 transitions. [2020-10-12 15:46:57,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 15:46:57,685 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 121 transitions. [2020-10-12 15:46:57,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 15:46:57,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:57,686 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:57,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 15:46:57,686 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:57,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:57,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1518376973, now seen corresponding path program 23 times [2020-10-12 15:46:57,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:57,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335135867] [2020-10-12 15:46:57,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:57,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:57,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:57,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:57,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:58,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:59,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:59,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:59,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:02,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:02,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 15:47:02,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:47:02,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 15:47:02,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:02,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 15:47:02,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:47:02,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 15:47:02,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:03,277 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-12 15:47:03,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:03,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:03,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:03,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:03,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:03,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:03,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:03,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:03,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:03,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:03,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:03,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 7 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:03,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335135867] [2020-10-12 15:47:03,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:03,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 15:47:03,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650500610] [2020-10-12 15:47:03,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 15:47:03,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:03,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 15:47:03,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:47:03,766 INFO L87 Difference]: Start difference. First operand 104 states and 121 transitions. Second operand 20 states. [2020-10-12 15:47:04,398 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2020-10-12 15:47:04,903 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 116 [2020-10-12 15:47:05,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:05,451 INFO L93 Difference]: Finished difference Result 120 states and 141 transitions. [2020-10-12 15:47:05,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:47:05,452 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2020-10-12 15:47:05,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:05,453 INFO L225 Difference]: With dead ends: 120 [2020-10-12 15:47:05,453 INFO L226 Difference]: Without dead ends: 112 [2020-10-12 15:47:05,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:47:05,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-12 15:47:05,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-12 15:47:05,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-12 15:47:05,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 129 transitions. [2020-10-12 15:47:05,466 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 129 transitions. Word has length 60 [2020-10-12 15:47:05,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:05,466 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 129 transitions. [2020-10-12 15:47:05,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 15:47:05,467 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 129 transitions. [2020-10-12 15:47:05,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 15:47:05,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:05,467 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:05,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 15:47:05,467 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:05,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:05,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1520224015, now seen corresponding path program 24 times [2020-10-12 15:47:05,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:05,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438299376] [2020-10-12 15:47:05,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:05,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:05,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:05,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:06,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:07,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:07,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:09,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:09,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 15:47:09,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:47:09,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4435 [2020-10-12 15:47:09,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:09,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 15:47:09,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:47:09,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 15:47:09,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:10,318 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-12 15:47:10,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:10,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:10,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:10,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:10,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:10,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:10,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:10,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:10,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:10,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:10,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:10,998 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:10,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438299376] [2020-10-12 15:47:10,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:10,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 15:47:10,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467626805] [2020-10-12 15:47:10,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 15:47:10,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:10,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 15:47:10,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:47:10,999 INFO L87 Difference]: Start difference. First operand 111 states and 129 transitions. Second operand 20 states. [2020-10-12 15:47:11,515 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2020-10-12 15:47:11,721 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 73 [2020-10-12 15:47:12,068 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 71 [2020-10-12 15:47:12,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:12,529 INFO L93 Difference]: Finished difference Result 120 states and 140 transitions. [2020-10-12 15:47:12,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:47:12,529 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2020-10-12 15:47:12,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:12,531 INFO L225 Difference]: With dead ends: 120 [2020-10-12 15:47:12,531 INFO L226 Difference]: Without dead ends: 117 [2020-10-12 15:47:12,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:47:12,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-12 15:47:12,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-10-12 15:47:12,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-12 15:47:12,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2020-10-12 15:47:12,543 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 60 [2020-10-12 15:47:12,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:12,544 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2020-10-12 15:47:12,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 15:47:12,544 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2020-10-12 15:47:12,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 15:47:12,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:12,545 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:12,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 15:47:12,545 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:12,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:12,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1892083227, now seen corresponding path program 25 times [2020-10-12 15:47:12,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:12,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703299333] [2020-10-12 15:47:12,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:12,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:12,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:12,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:13,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:13,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:14,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:14,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:14,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:17,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:17,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 15:47:17,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 15:47:17,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 15:47:17,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:17,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:47:17,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:47:17,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 15:47:17,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:18,035 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-12 15:47:18,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:18,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:18,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:18,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:18,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:18,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:18,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:18,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:18,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:18,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:18,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:18,678 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:18,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703299333] [2020-10-12 15:47:18,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:18,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:47:18,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388444763] [2020-10-12 15:47:18,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:47:18,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:18,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:47:18,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:47:18,680 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand 19 states. [2020-10-12 15:47:19,293 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-12 15:47:19,677 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2020-10-12 15:47:20,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:20,444 INFO L93 Difference]: Finished difference Result 125 states and 147 transitions. [2020-10-12 15:47:20,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 15:47:20,444 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 60 [2020-10-12 15:47:20,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:20,446 INFO L225 Difference]: With dead ends: 125 [2020-10-12 15:47:20,446 INFO L226 Difference]: Without dead ends: 117 [2020-10-12 15:47:20,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 15:47:20,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-12 15:47:20,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-10-12 15:47:20,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-12 15:47:20,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 135 transitions. [2020-10-12 15:47:20,461 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 135 transitions. Word has length 60 [2020-10-12 15:47:20,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:20,461 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 135 transitions. [2020-10-12 15:47:20,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:47:20,461 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 135 transitions. [2020-10-12 15:47:20,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 15:47:20,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:20,462 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:20,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-12 15:47:20,463 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:20,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:20,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1893930269, now seen corresponding path program 26 times [2020-10-12 15:47:20,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:20,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103242639] [2020-10-12 15:47:20,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:20,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:20,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:20,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:20,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:20,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:21,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:22,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:23,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:23,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 15:47:23,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:47:23,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3262 [2020-10-12 15:47:23,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:23,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:47:23,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:47:23,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 15:47:23,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:24,342 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-10-12 15:47:24,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:24,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:24,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:24,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:24,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:24,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:24,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:24,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:24,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:24,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:24,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:24,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 17 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:24,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103242639] [2020-10-12 15:47:24,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:24,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:47:24,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357709846] [2020-10-12 15:47:24,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:47:24,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:24,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:47:24,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:47:24,743 INFO L87 Difference]: Start difference. First operand 116 states and 135 transitions. Second operand 19 states. [2020-10-12 15:47:25,216 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-12 15:47:25,570 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 72 [2020-10-12 15:47:26,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:26,359 INFO L93 Difference]: Finished difference Result 127 states and 148 transitions. [2020-10-12 15:47:26,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 15:47:26,359 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 60 [2020-10-12 15:47:26,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:26,361 INFO L225 Difference]: With dead ends: 127 [2020-10-12 15:47:26,361 INFO L226 Difference]: Without dead ends: 117 [2020-10-12 15:47:26,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:47:26,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-12 15:47:26,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-10-12 15:47:26,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-12 15:47:26,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 134 transitions. [2020-10-12 15:47:26,375 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 134 transitions. Word has length 60 [2020-10-12 15:47:26,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:26,375 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 134 transitions. [2020-10-12 15:47:26,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:47:26,376 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 134 transitions. [2020-10-12 15:47:26,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 15:47:26,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:26,376 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:26,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-12 15:47:26,377 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:26,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:26,377 INFO L82 PathProgramCache]: Analyzing trace with hash -626029665, now seen corresponding path program 27 times [2020-10-12 15:47:26,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:26,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984162034] [2020-10-12 15:47:26,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:26,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:26,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:26,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:26,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:27,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:28,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:28,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 15:47:28,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:47:28,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2161 [2020-10-12 15:47:28,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:28,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:47:28,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:47:28,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 15:47:28,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:29,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:29,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:29,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:29,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:29,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:29,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:29,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:29,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:29,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:29,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:29,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:29,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:29,018 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 30 proven. 46 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-12 15:47:29,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984162034] [2020-10-12 15:47:29,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:29,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:47:29,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21446973] [2020-10-12 15:47:29,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:47:29,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:29,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:47:29,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:47:29,020 INFO L87 Difference]: Start difference. First operand 116 states and 134 transitions. Second operand 16 states. [2020-10-12 15:47:29,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:29,611 INFO L93 Difference]: Finished difference Result 159 states and 183 transitions. [2020-10-12 15:47:29,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:47:29,612 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 60 [2020-10-12 15:47:29,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:29,614 INFO L225 Difference]: With dead ends: 159 [2020-10-12 15:47:29,614 INFO L226 Difference]: Without dead ends: 116 [2020-10-12 15:47:29,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:47:29,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-12 15:47:29,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-10-12 15:47:29,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-12 15:47:29,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 131 transitions. [2020-10-12 15:47:29,636 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 131 transitions. Word has length 60 [2020-10-12 15:47:29,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:29,637 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 131 transitions. [2020-10-12 15:47:29,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:47:29,637 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 131 transitions. [2020-10-12 15:47:29,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 15:47:29,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:29,638 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:29,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-12 15:47:29,638 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:29,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:29,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1443678115, now seen corresponding path program 3 times [2020-10-12 15:47:29,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:29,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816004348] [2020-10-12 15:47:29,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:29,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:29,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:30,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:30,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 15:47:30,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:47:30,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 573 [2020-10-12 15:47:30,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:30,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:47:30,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:47:30,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 15:47:30,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:30,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:30,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:30,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:30,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:30,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:30,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:30,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:30,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:30,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:30,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:30,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:30,690 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 26 proven. 44 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-12 15:47:30,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816004348] [2020-10-12 15:47:30,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:30,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:47:30,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075781636] [2020-10-12 15:47:30,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:47:30,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:30,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:47:30,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:47:30,691 INFO L87 Difference]: Start difference. First operand 116 states and 131 transitions. Second operand 16 states. [2020-10-12 15:47:31,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:31,397 INFO L93 Difference]: Finished difference Result 165 states and 186 transitions. [2020-10-12 15:47:31,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:47:31,398 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 60 [2020-10-12 15:47:31,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:31,399 INFO L225 Difference]: With dead ends: 165 [2020-10-12 15:47:31,400 INFO L226 Difference]: Without dead ends: 116 [2020-10-12 15:47:31,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:47:31,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-12 15:47:31,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-10-12 15:47:31,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-12 15:47:31,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 128 transitions. [2020-10-12 15:47:31,413 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 128 transitions. Word has length 60 [2020-10-12 15:47:31,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:31,413 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 128 transitions. [2020-10-12 15:47:31,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:47:31,413 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 128 transitions. [2020-10-12 15:47:31,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 15:47:31,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:31,414 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:31,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-12 15:47:31,414 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:31,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:31,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1224823397, now seen corresponding path program 4 times [2020-10-12 15:47:31,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:31,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123233756] [2020-10-12 15:47:31,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:31,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:31,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:31,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:31,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 15:47:31,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:31,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-12 15:47:31,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:31,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:47:31,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:47:31,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:47:31,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:31,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:31,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:31,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:31,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:31,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:31,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:31,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:31,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:31,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:31,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:31,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:31,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:31,615 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-12 15:47:31,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123233756] [2020-10-12 15:47:31,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:31,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:47:31,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500965316] [2020-10-12 15:47:31,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:47:31,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:31,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:47:31,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:47:31,616 INFO L87 Difference]: Start difference. First operand 116 states and 128 transitions. Second operand 9 states. [2020-10-12 15:47:31,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:31,763 INFO L93 Difference]: Finished difference Result 175 states and 196 transitions. [2020-10-12 15:47:31,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:47:31,763 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-10-12 15:47:31,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:31,764 INFO L225 Difference]: With dead ends: 175 [2020-10-12 15:47:31,765 INFO L226 Difference]: Without dead ends: 90 [2020-10-12 15:47:31,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:47:31,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-12 15:47:31,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-12 15:47:31,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-12 15:47:31,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2020-10-12 15:47:31,777 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 60 [2020-10-12 15:47:31,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:31,778 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2020-10-12 15:47:31,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:47:31,778 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2020-10-12 15:47:31,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 15:47:31,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:31,779 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:31,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-12 15:47:31,779 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:31,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:31,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1481327781, now seen corresponding path program 28 times [2020-10-12 15:47:31,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:31,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438405029] [2020-10-12 15:47:31,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:31,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:31,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:32,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:32,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:32,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:33,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:36,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:36,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 15:47:36,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:47:36,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4384 [2020-10-12 15:47:36,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:36,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 15:47:36,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:47:36,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 15:47:36,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:36,679 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-12 15:47:36,909 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-10-12 15:47:37,076 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 62 [2020-10-12 15:47:37,241 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-10-12 15:47:37,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:37,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:37,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:37,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:37,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:37,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:37,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:37,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:37,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:37,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:37,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:37,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:37,674 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 9 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:37,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438405029] [2020-10-12 15:47:37,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:37,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 15:47:37,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100491816] [2020-10-12 15:47:37,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 15:47:37,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:37,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 15:47:37,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:47:37,676 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand 21 states. [2020-10-12 15:47:38,314 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-12 15:47:38,688 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-12 15:47:38,912 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-12 15:47:39,267 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 76 [2020-10-12 15:47:40,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:40,124 INFO L93 Difference]: Finished difference Result 109 states and 122 transitions. [2020-10-12 15:47:40,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:47:40,125 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-10-12 15:47:40,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:40,126 INFO L225 Difference]: With dead ends: 109 [2020-10-12 15:47:40,126 INFO L226 Difference]: Without dead ends: 101 [2020-10-12 15:47:40,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 15:47:40,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-12 15:47:40,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2020-10-12 15:47:40,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-12 15:47:40,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2020-10-12 15:47:40,137 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 65 [2020-10-12 15:47:40,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:40,137 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2020-10-12 15:47:40,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 15:47:40,138 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2020-10-12 15:47:40,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 15:47:40,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:40,138 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:40,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-12 15:47:40,138 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:40,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:40,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1479480739, now seen corresponding path program 5 times [2020-10-12 15:47:40,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:40,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341308284] [2020-10-12 15:47:40,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:40,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:40,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:40,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:40,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:41,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:41,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 15:47:41,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:47:41,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1683 [2020-10-12 15:47:41,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:41,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 15:47:41,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:47:41,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 15:47:41,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:42,452 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-12 15:47:42,693 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-10-12 15:47:43,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:43,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:43,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:43,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:43,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:43,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:43,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:43,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:43,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:43,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:43,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:43,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:43,198 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:43,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341308284] [2020-10-12 15:47:43,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:43,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 15:47:43,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520723616] [2020-10-12 15:47:43,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 15:47:43,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:43,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 15:47:43,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:47:43,200 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand 21 states. [2020-10-12 15:47:43,966 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-12 15:47:44,341 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 76 [2020-10-12 15:47:45,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:45,156 INFO L93 Difference]: Finished difference Result 109 states and 121 transitions. [2020-10-12 15:47:45,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 15:47:45,157 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-10-12 15:47:45,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:45,159 INFO L225 Difference]: With dead ends: 109 [2020-10-12 15:47:45,159 INFO L226 Difference]: Without dead ends: 106 [2020-10-12 15:47:45,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=140, Invalid=1342, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 15:47:45,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-12 15:47:45,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 90. [2020-10-12 15:47:45,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-12 15:47:45,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2020-10-12 15:47:45,174 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 65 [2020-10-12 15:47:45,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:45,174 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2020-10-12 15:47:45,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 15:47:45,174 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2020-10-12 15:47:45,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 15:47:45,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:45,175 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:45,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-12 15:47:45,176 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:45,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:45,176 INFO L82 PathProgramCache]: Analyzing trace with hash 401876953, now seen corresponding path program 29 times [2020-10-12 15:47:45,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:45,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917633801] [2020-10-12 15:47:45,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:45,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:45,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:46,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:46,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:46,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:46,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:48,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:50,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:50,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 15:47:50,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:47:50,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 15:47:50,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:50,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 15:47:50,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:47:50,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 15:47:50,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:50,669 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-12 15:47:50,973 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-10-12 15:47:51,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:51,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:51,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:51,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:51,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:51,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:51,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:51,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:51,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:51,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:51,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:51,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 9 proven. 139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:51,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917633801] [2020-10-12 15:47:51,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:51,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 15:47:51,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250832041] [2020-10-12 15:47:51,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 15:47:51,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:51,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 15:47:51,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:47:51,786 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand 23 states. [2020-10-12 15:47:52,392 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-10-12 15:47:52,709 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-12 15:47:53,113 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 83 [2020-10-12 15:47:53,359 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 82 [2020-10-12 15:47:54,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:54,060 INFO L93 Difference]: Finished difference Result 111 states and 125 transitions. [2020-10-12 15:47:54,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:47:54,061 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 70 [2020-10-12 15:47:54,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:54,061 INFO L225 Difference]: With dead ends: 111 [2020-10-12 15:47:54,062 INFO L226 Difference]: Without dead ends: 103 [2020-10-12 15:47:54,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=131, Invalid=1275, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 15:47:54,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-12 15:47:54,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-12 15:47:54,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-12 15:47:54,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 113 transitions. [2020-10-12 15:47:54,073 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 113 transitions. Word has length 70 [2020-10-12 15:47:54,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:54,073 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 113 transitions. [2020-10-12 15:47:54,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 15:47:54,073 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 113 transitions. [2020-10-12 15:47:54,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 15:47:54,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:54,074 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:54,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-12 15:47:54,075 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:54,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:54,075 INFO L82 PathProgramCache]: Analyzing trace with hash 403723995, now seen corresponding path program 6 times [2020-10-12 15:47:54,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:54,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709050303] [2020-10-12 15:47:54,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:54,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:54,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:55,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:55,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:58,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:58,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 15:47:58,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:47:58,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4531 [2020-10-12 15:47:58,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:58,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 15:47:58,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:47:58,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 15:47:58,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:59,019 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-12 15:47:59,254 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-12 15:47:59,392 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-12 15:47:59,576 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-10-12 15:47:59,875 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2020-10-12 15:48:00,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:00,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:00,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:00,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:00,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:00,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:48:00,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:00,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:00,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:00,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:00,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:00,592 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 17 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:00,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709050303] [2020-10-12 15:48:00,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:00,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 15:48:00,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418044771] [2020-10-12 15:48:00,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 15:48:00,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:00,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 15:48:00,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:48:00,593 INFO L87 Difference]: Start difference. First operand 102 states and 113 transitions. Second operand 23 states. [2020-10-12 15:48:01,337 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-10-12 15:48:01,781 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 76 [2020-10-12 15:48:01,989 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-12 15:48:02,280 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 80 [2020-10-12 15:48:02,577 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 87 [2020-10-12 15:48:03,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:03,404 INFO L93 Difference]: Finished difference Result 117 states and 130 transitions. [2020-10-12 15:48:03,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:48:03,405 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 70 [2020-10-12 15:48:03,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:03,406 INFO L225 Difference]: With dead ends: 117 [2020-10-12 15:48:03,406 INFO L226 Difference]: Without dead ends: 103 [2020-10-12 15:48:03,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=125, Invalid=1281, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 15:48:03,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-12 15:48:03,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-12 15:48:03,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-12 15:48:03,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2020-10-12 15:48:03,420 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 70 [2020-10-12 15:48:03,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:03,420 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2020-10-12 15:48:03,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 15:48:03,420 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2020-10-12 15:48:03,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 15:48:03,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:03,421 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:03,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-12 15:48:03,423 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:03,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:03,424 INFO L82 PathProgramCache]: Analyzing trace with hash -2116235939, now seen corresponding path program 7 times [2020-10-12 15:48:03,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:03,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173851393] [2020-10-12 15:48:03,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:03,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:03,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:03,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:04,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:06,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:06,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 15:48:06,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:48:06,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2691 [2020-10-12 15:48:06,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:06,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 15:48:06,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:48:06,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 15:48:06,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:06,722 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-12 15:48:06,851 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-12 15:48:07,060 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-10-12 15:48:07,426 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-10-12 15:48:07,591 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-10-12 15:48:08,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:08,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:08,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:08,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:08,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:08,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:08,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:48:08,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:08,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:08,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:08,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:08,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:08,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173851393] [2020-10-12 15:48:08,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:08,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 15:48:08,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323846803] [2020-10-12 15:48:08,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 15:48:08,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:08,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 15:48:08,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:48:08,217 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand 23 states. [2020-10-12 15:48:09,368 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2020-10-12 15:48:10,193 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 90 [2020-10-12 15:48:10,607 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 111 [2020-10-12 15:48:11,302 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 109 [2020-10-12 15:48:12,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:12,033 INFO L93 Difference]: Finished difference Result 114 states and 125 transitions. [2020-10-12 15:48:12,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 15:48:12,034 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 70 [2020-10-12 15:48:12,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:12,035 INFO L225 Difference]: With dead ends: 114 [2020-10-12 15:48:12,036 INFO L226 Difference]: Without dead ends: 111 [2020-10-12 15:48:12,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=137, Invalid=1423, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 15:48:12,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-12 15:48:12,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 95. [2020-10-12 15:48:12,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-12 15:48:12,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2020-10-12 15:48:12,048 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 70 [2020-10-12 15:48:12,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:12,048 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2020-10-12 15:48:12,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 15:48:12,048 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2020-10-12 15:48:12,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 15:48:12,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:12,049 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:12,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-12 15:48:12,049 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:12,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:12,049 INFO L82 PathProgramCache]: Analyzing trace with hash -322133617, now seen corresponding path program 30 times [2020-10-12 15:48:12,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:12,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827386225] [2020-10-12 15:48:12,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:12,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:12,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:12,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:12,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:12,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:13,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:14,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:14,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 15:48:14,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:48:14,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2633 [2020-10-12 15:48:14,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:14,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 15:48:14,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:48:14,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 15:48:14,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:15,169 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-10-12 15:48:15,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:15,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:15,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:15,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:15,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:15,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:15,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:48:15,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:15,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:15,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:15,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:15,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:15,751 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 11 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:15,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827386225] [2020-10-12 15:48:15,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:15,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 15:48:15,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735876932] [2020-10-12 15:48:15,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 15:48:15,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:15,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 15:48:15,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:48:15,753 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand 22 states. [2020-10-12 15:48:16,619 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 80 [2020-10-12 15:48:17,096 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 91 [2020-10-12 15:48:18,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:18,056 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2020-10-12 15:48:18,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 15:48:18,057 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 70 [2020-10-12 15:48:18,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:18,058 INFO L225 Difference]: With dead ends: 119 [2020-10-12 15:48:18,058 INFO L226 Difference]: Without dead ends: 111 [2020-10-12 15:48:18,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=136, Invalid=1270, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 15:48:18,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-12 15:48:18,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2020-10-12 15:48:18,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-12 15:48:18,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2020-10-12 15:48:18,070 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 70 [2020-10-12 15:48:18,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:18,070 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2020-10-12 15:48:18,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 15:48:18,070 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2020-10-12 15:48:18,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 15:48:18,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:18,071 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:18,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-12 15:48:18,071 INFO L427 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:18,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:18,071 INFO L82 PathProgramCache]: Analyzing trace with hash -320286575, now seen corresponding path program 8 times [2020-10-12 15:48:18,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:18,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412955131] [2020-10-12 15:48:18,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:18,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:18,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:19,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:19,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 15:48:19,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:48:19,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 982 [2020-10-12 15:48:19,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:19,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 15:48:19,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:48:19,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 15:48:19,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:19,400 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51