/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/heap-data/calendar.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:24:21,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:24:21,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:24:21,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:24:21,084 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:24:21,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:24:21,087 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:24:21,088 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:24:21,090 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:24:21,091 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:24:21,092 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:24:21,093 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:24:21,093 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:24:21,094 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:24:21,095 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:24:21,096 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:24:21,097 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:24:21,098 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:24:21,099 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:24:21,101 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:24:21,102 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:24:21,103 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:24:21,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:24:21,105 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:24:21,108 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:24:21,108 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:24:21,108 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:24:21,109 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:24:21,110 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:24:21,110 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:24:21,111 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:24:21,111 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:24:21,112 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:24:21,113 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:24:21,114 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:24:21,114 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:24:21,115 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:24:21,115 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:24:21,115 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:24:21,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:24:21,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:24:21,118 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 23:24:21,166 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:24:21,167 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:24:21,171 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:24:21,171 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:24:21,171 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:24:21,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:24:21,172 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:24:21,172 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:24:21,172 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:24:21,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:24:21,173 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:24:21,173 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:24:21,173 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:24:21,173 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:24:21,173 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:24:21,174 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:24:21,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:24:21,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:24:21,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:24:21,175 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:24:21,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:24:21,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:24:21,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:24:21,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:24:21,176 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:24:21,177 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:24:21,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:24:21,177 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:24:21,177 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:24:21,177 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 23:24:21,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:24:21,529 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:24:21,535 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:24:21,537 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:24:21,538 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:24:21,538 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-data/calendar.i [2020-10-14 23:24:21,599 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7dea248bc/298419bf2401433ab0954451ed4ec2ad/FLAG6c6c6bf9f [2020-10-14 23:24:22,151 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:24:22,152 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-data/calendar.i [2020-10-14 23:24:22,167 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7dea248bc/298419bf2401433ab0954451ed4ec2ad/FLAG6c6c6bf9f [2020-10-14 23:24:22,432 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7dea248bc/298419bf2401433ab0954451ed4ec2ad [2020-10-14 23:24:22,440 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:24:22,442 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:24:22,444 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:24:22,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:24:22,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:24:22,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:24:22" (1/1) ... [2020-10-14 23:24:22,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f21c349 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:24:22, skipping insertion in model container [2020-10-14 23:24:22,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:24:22" (1/1) ... [2020-10-14 23:24:22,459 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:24:22,507 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:24:22,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:24:22,953 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:24:23,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:24:23,096 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:24:23,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:24:23 WrapperNode [2020-10-14 23:24:23,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:24:23,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:24:23,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:24:23,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:24:23,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:24:23" (1/1) ... [2020-10-14 23:24:23,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:24:23" (1/1) ... [2020-10-14 23:24:23,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:24:23" (1/1) ... [2020-10-14 23:24:23,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:24:23" (1/1) ... [2020-10-14 23:24:23,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:24:23" (1/1) ... [2020-10-14 23:24:23,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:24:23" (1/1) ... [2020-10-14 23:24:23,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:24:23" (1/1) ... [2020-10-14 23:24:23,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:24:23,165 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:24:23,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:24:23,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:24:23,167 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:24:23" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:24:23,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:24:23,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:24:23,232 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-14 23:24:23,232 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-14 23:24:23,232 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:24:23,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 23:24:23,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:24:23,234 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-14 23:24:23,234 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-14 23:24:23,234 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-14 23:24:23,235 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-14 23:24:23,235 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-14 23:24:23,235 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-14 23:24:23,235 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-14 23:24:23,235 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-14 23:24:23,236 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-14 23:24:23,236 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-14 23:24:23,236 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-14 23:24:23,236 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-14 23:24:23,237 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-14 23:24:23,237 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-14 23:24:23,238 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-14 23:24:23,238 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-14 23:24:23,238 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-14 23:24:23,238 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-14 23:24:23,240 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-14 23:24:23,240 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-14 23:24:23,241 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-14 23:24:23,241 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-14 23:24:23,241 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-14 23:24:23,241 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-14 23:24:23,241 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-14 23:24:23,241 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-14 23:24:23,241 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-14 23:24:23,242 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-14 23:24:23,242 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-14 23:24:23,242 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-14 23:24:23,244 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-14 23:24:23,244 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-14 23:24:23,244 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-14 23:24:23,244 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-14 23:24:23,245 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-14 23:24:23,245 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-14 23:24:23,245 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-14 23:24:23,246 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-14 23:24:23,247 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-14 23:24:23,247 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-14 23:24:23,247 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-14 23:24:23,247 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-14 23:24:23,248 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-14 23:24:23,248 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-14 23:24:23,248 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-14 23:24:23,248 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-14 23:24:23,248 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-14 23:24:23,249 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-14 23:24:23,249 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-14 23:24:23,249 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-14 23:24:23,249 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-14 23:24:23,249 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-14 23:24:23,249 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 23:24:23,250 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-14 23:24:23,251 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-14 23:24:23,251 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-14 23:24:23,251 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-14 23:24:23,251 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-14 23:24:23,251 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-14 23:24:23,251 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-14 23:24:23,252 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-14 23:24:23,253 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 23:24:23,253 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-14 23:24:23,254 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-14 23:24:23,255 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-14 23:24:23,255 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 23:24:23,255 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-14 23:24:23,255 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-14 23:24:23,256 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-14 23:24:23,256 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-14 23:24:23,256 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-14 23:24:23,256 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-14 23:24:23,256 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-14 23:24:23,256 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-14 23:24:23,256 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-14 23:24:23,257 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-14 23:24:23,257 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-14 23:24:23,257 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-14 23:24:23,257 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-14 23:24:23,257 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-14 23:24:23,257 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-14 23:24:23,257 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-14 23:24:23,258 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-14 23:24:23,258 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-14 23:24:23,258 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-14 23:24:23,258 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-14 23:24:23,258 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-14 23:24:23,258 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-14 23:24:23,258 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-14 23:24:23,259 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-14 23:24:23,259 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-14 23:24:23,259 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-14 23:24:23,259 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-14 23:24:23,259 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-14 23:24:23,259 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-14 23:24:23,259 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-14 23:24:23,259 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-14 23:24:23,260 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-14 23:24:23,260 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-14 23:24:23,260 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-14 23:24:23,260 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-14 23:24:23,260 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-14 23:24:23,260 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-14 23:24:23,260 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-14 23:24:23,261 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-14 23:24:23,261 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:24:23,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 23:24:23,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 23:24:23,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-14 23:24:23,262 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 23:24:23,262 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-14 23:24:23,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:24:23,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:24:23,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 23:24:23,736 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:24:23,737 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 23:24:23,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:24:23 BoogieIcfgContainer [2020-10-14 23:24:23,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:24:23,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:24:23,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:24:23,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:24:23,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:24:22" (1/3) ... [2020-10-14 23:24:23,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@798f730e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:24:23, skipping insertion in model container [2020-10-14 23:24:23,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:24:23" (2/3) ... [2020-10-14 23:24:23,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@798f730e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:24:23, skipping insertion in model container [2020-10-14 23:24:23,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:24:23" (3/3) ... [2020-10-14 23:24:23,749 INFO L109 eAbstractionObserver]: Analyzing ICFG calendar.i [2020-10-14 23:24:23,760 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:24:23,768 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:24:23,779 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:24:23,803 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:24:23,803 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:24:23,803 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:24:23,803 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:24:23,804 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:24:23,804 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:24:23,804 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:24:23,804 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:24:23,821 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-14 23:24:23,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 23:24:23,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:24:23,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:24:23,828 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:24:23,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:24:23,833 INFO L82 PathProgramCache]: Analyzing trace with hash 2072180544, now seen corresponding path program 1 times [2020-10-14 23:24:23,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:24:23,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090823061] [2020-10-14 23:24:23,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:24:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:24:23,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:24,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:24,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:24:24,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 23:24:24,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:24:24,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 218 [2020-10-14 23:24:24,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:24:24,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:24:24,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:24:24,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:24:24,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 23:24:24,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 23:24:24,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:24:24,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:24:24,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:24,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:24:24,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:24:24,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:24:24,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 23:24:24,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:24:24,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:24:24,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:24:24,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:24:24,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:24:24,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 25 [2020-10-14 23:24:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:24:24,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090823061] [2020-10-14 23:24:24,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:24:24,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 23:24:24,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208772596] [2020-10-14 23:24:24,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:24:24,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:24:24,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:24:24,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:24:24,397 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 5 states. [2020-10-14 23:24:24,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:24:24,635 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2020-10-14 23:24:24,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:24:24,637 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-14 23:24:24,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:24:24,650 INFO L225 Difference]: With dead ends: 50 [2020-10-14 23:24:24,651 INFO L226 Difference]: Without dead ends: 27 [2020-10-14 23:24:24,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:24:24,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-14 23:24:24,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-14 23:24:24,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 23:24:24,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2020-10-14 23:24:24,712 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 14 [2020-10-14 23:24:24,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:24:24,713 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2020-10-14 23:24:24,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:24:24,713 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2020-10-14 23:24:24,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:24:24,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:24:24,714 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:24:24,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:24:24,715 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:24:24,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:24:24,715 INFO L82 PathProgramCache]: Analyzing trace with hash -899083565, now seen corresponding path program 1 times [2020-10-14 23:24:24,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:24:24,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099667157] [2020-10-14 23:24:24,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:24:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:24:24,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:24,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:25,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:24:25,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:24:25,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:24:25,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 410 [2020-10-14 23:24:25,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:24:25,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:24:25,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:24:25,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:24:25,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:24:25,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:24:25,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:24:25,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:24:25,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:25,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:24:25,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:24:25,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:24:25,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:24:25,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:24:25,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:24:25,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:24:25,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:24:25,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:24:25,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:24:25,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:24:25,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099667157] [2020-10-14 23:24:25,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:24:25,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-14 23:24:25,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258137443] [2020-10-14 23:24:25,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:24:25,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:24:25,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:24:25,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:24:25,268 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 8 states. [2020-10-14 23:24:25,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:24:25,625 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-10-14 23:24:25,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:24:25,627 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-14 23:24:25,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:24:25,629 INFO L225 Difference]: With dead ends: 52 [2020-10-14 23:24:25,629 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 23:24:25,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:24:25,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 23:24:25,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2020-10-14 23:24:25,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 23:24:25,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2020-10-14 23:24:25,648 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 21 [2020-10-14 23:24:25,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:24:25,648 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2020-10-14 23:24:25,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:24:25,648 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2020-10-14 23:24:25,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 23:24:25,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:24:25,657 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:24:25,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:24:25,660 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:24:25,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:24:25,660 INFO L82 PathProgramCache]: Analyzing trace with hash -729273639, now seen corresponding path program 1 times [2020-10-14 23:24:25,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:24:25,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271157350] [2020-10-14 23:24:25,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:24:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:24:25,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:25,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:25,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:24:25,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 23:24:25,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:24:25,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 246 [2020-10-14 23:24:25,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:24:25,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:24:25,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:24:25,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:24:25,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:24:25,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:24:26,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:24:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:24:26,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:26,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:24:26,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:24:26,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:24:26,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:24:26,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:24:26,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:24:26,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:24:26,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:24:26,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:24:26,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:24:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:24:26,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271157350] [2020-10-14 23:24:26,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:24:26,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-14 23:24:26,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243392904] [2020-10-14 23:24:26,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:24:26,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:24:26,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:24:26,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:24:26,077 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand 8 states. [2020-10-14 23:24:26,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:24:26,337 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-10-14 23:24:26,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:24:26,338 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-14 23:24:26,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:24:26,339 INFO L225 Difference]: With dead ends: 41 [2020-10-14 23:24:26,339 INFO L226 Difference]: Without dead ends: 39 [2020-10-14 23:24:26,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:24:26,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-14 23:24:26,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-10-14 23:24:26,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 23:24:26,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2020-10-14 23:24:26,347 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 23 [2020-10-14 23:24:26,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:24:26,347 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2020-10-14 23:24:26,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:24:26,347 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2020-10-14 23:24:26,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 23:24:26,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:24:26,349 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] [2020-10-14 23:24:26,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:24:26,349 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:24:26,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:24:26,350 INFO L82 PathProgramCache]: Analyzing trace with hash -724012223, now seen corresponding path program 1 times [2020-10-14 23:24:26,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:24:26,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361843529] [2020-10-14 23:24:26,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:24:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:24:26,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:26,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:26,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:24:26,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:24:26,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:24:26,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-10-14 23:24:26,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:24:26,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:24:26,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:24:26,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:24:26,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:24:26,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:24:26,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:24:26,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:24:26,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:26,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:24:26,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:24:26,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:24:26,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:24:26,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:24:26,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:24:26,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:24:26,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:24:26,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:24:26,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:24:26,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:24:26,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361843529] [2020-10-14 23:24:26,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:24:26,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:24:26,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257043886] [2020-10-14 23:24:26,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:24:26,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:24:26,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:24:26,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:24:26,904 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand 7 states. [2020-10-14 23:24:27,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:24:27,141 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2020-10-14 23:24:27,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:24:27,142 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-14 23:24:27,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:24:27,144 INFO L225 Difference]: With dead ends: 65 [2020-10-14 23:24:27,144 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 23:24:27,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:24:27,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 23:24:27,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-14 23:24:27,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 23:24:27,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2020-10-14 23:24:27,160 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 29 [2020-10-14 23:24:27,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:24:27,161 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2020-10-14 23:24:27,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:24:27,162 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2020-10-14 23:24:27,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 23:24:27,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:24:27,165 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:24:27,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:24:27,166 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:24:27,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:24:27,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1775648707, now seen corresponding path program 2 times [2020-10-14 23:24:27,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:24:27,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660576855] [2020-10-14 23:24:27,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:24:27,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:24:27,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:27,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:27,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:28,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:24:28,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:24:28,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:24:28,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 998 [2020-10-14 23:24:28,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:24:28,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:24:28,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:24:28,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:24:28,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:24:28,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:24:28,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:24:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:24:28,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:28,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:24:28,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:24:28,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:24:28,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:24:28,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:24:28,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:24:28,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:24:28,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:24:28,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:24:28,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:24:28,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:24:28,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660576855] [2020-10-14 23:24:28,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:24:28,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:24:28,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524837463] [2020-10-14 23:24:28,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:24:28,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:24:28,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:24:28,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:24:28,358 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand 10 states. [2020-10-14 23:24:29,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:24:29,005 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2020-10-14 23:24:29,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:24:29,006 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-14 23:24:29,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:24:29,009 INFO L225 Difference]: With dead ends: 77 [2020-10-14 23:24:29,009 INFO L226 Difference]: Without dead ends: 63 [2020-10-14 23:24:29,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:24:29,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-14 23:24:29,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-14 23:24:29,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 23:24:29,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2020-10-14 23:24:29,019 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 34 [2020-10-14 23:24:29,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:24:29,019 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2020-10-14 23:24:29,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:24:29,020 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2020-10-14 23:24:29,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 23:24:29,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:24:29,021 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:24:29,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:24:29,022 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:24:29,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:24:29,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1294785085, now seen corresponding path program 1 times [2020-10-14 23:24:29,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:24:29,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636616697] [2020-10-14 23:24:29,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:24:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:24:29,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:29,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:29,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:29,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:24:29,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:24:30,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:24:30,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 958 [2020-10-14 23:24:30,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:24:30,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:24:30,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:24:30,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:24:30,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 23:24:30,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:24:30,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:24:30,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:24:30,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:30,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:24:30,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:24:30,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:24:30,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:24:30,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:24:30,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:24:30,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:24:30,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:24:30,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:24:30,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:24:30,173 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:24:30,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636616697] [2020-10-14 23:24:30,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:24:30,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:24:30,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144499974] [2020-10-14 23:24:30,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:24:30,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:24:30,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:24:30,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:24:30,175 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand 10 states. [2020-10-14 23:24:30,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:24:30,810 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2020-10-14 23:24:30,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:24:30,810 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-14 23:24:30,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:24:30,811 INFO L225 Difference]: With dead ends: 56 [2020-10-14 23:24:30,812 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 23:24:30,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:24:30,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 23:24:30,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-10-14 23:24:30,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 23:24:30,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2020-10-14 23:24:30,820 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 36 [2020-10-14 23:24:30,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:24:30,820 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2020-10-14 23:24:30,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:24:30,820 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2020-10-14 23:24:30,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 23:24:30,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:24:30,822 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:24:30,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:24:30,822 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:24:30,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:24:30,823 INFO L82 PathProgramCache]: Analyzing trace with hash -2081286485, now seen corresponding path program 3 times [2020-10-14 23:24:30,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:24:30,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379618900] [2020-10-14 23:24:30,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:24:30,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:24:30,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:30,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:30,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:33,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:24:33,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 23:24:33,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:24:33,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2928 [2020-10-14 23:24:33,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:24:33,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:24:33,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:24:33,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:24:33,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 23:24:33,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:24:33,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:24:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:24:33,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:33,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:24:33,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:24:33,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:24:33,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:24:33,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:24:33,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:24:33,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:24:33,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:24:33,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:24:33,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:24:33,994 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:24:33,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379618900] [2020-10-14 23:24:33,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:24:33,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:24:33,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148854313] [2020-10-14 23:24:33,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:24:33,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:24:33,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:24:33,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:24:33,996 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand 9 states. [2020-10-14 23:24:34,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:24:34,475 INFO L93 Difference]: Finished difference Result 86 states and 110 transitions. [2020-10-14 23:24:34,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:24:34,475 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-14 23:24:34,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:24:34,476 INFO L225 Difference]: With dead ends: 86 [2020-10-14 23:24:34,477 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 23:24:34,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:24:34,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 23:24:34,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-14 23:24:34,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 23:24:34,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2020-10-14 23:24:34,485 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 42 [2020-10-14 23:24:34,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:24:34,486 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2020-10-14 23:24:34,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:24:34,486 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2020-10-14 23:24:34,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 23:24:34,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:24:34,488 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:24:34,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:24:34,488 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:24:34,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:24:34,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1550762799, now seen corresponding path program 4 times [2020-10-14 23:24:34,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:24:34,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296723163] [2020-10-14 23:24:34,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:24:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:24:34,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:34,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:35,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:35,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:38,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:24:38,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 23:24:38,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:24:38,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4207 [2020-10-14 23:24:38,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:24:38,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:24:38,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:24:38,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:24:38,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 23:24:38,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:24:38,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:24:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:24:38,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:38,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:24:38,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:24:38,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:24:38,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:24:38,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:24:38,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:24:38,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:24:38,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:24:38,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:24:38,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:24:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:24:38,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296723163] [2020-10-14 23:24:38,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:24:38,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:24:38,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345370717] [2020-10-14 23:24:38,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:24:39,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:24:39,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:24:39,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:24:39,000 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand 12 states. [2020-10-14 23:24:40,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:24:40,307 INFO L93 Difference]: Finished difference Result 90 states and 114 transitions. [2020-10-14 23:24:40,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:24:40,308 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-14 23:24:40,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:24:40,309 INFO L225 Difference]: With dead ends: 90 [2020-10-14 23:24:40,309 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 23:24:40,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:24:40,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 23:24:40,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2020-10-14 23:24:40,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 23:24:40,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 76 transitions. [2020-10-14 23:24:40,319 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 76 transitions. Word has length 47 [2020-10-14 23:24:40,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:24:40,320 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 76 transitions. [2020-10-14 23:24:40,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:24:40,320 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 76 transitions. [2020-10-14 23:24:40,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 23:24:40,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:24:40,321 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:24:40,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 23:24:40,321 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:24:40,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:24:40,322 INFO L82 PathProgramCache]: Analyzing trace with hash -68996043, now seen corresponding path program 2 times [2020-10-14 23:24:40,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:24:40,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620810685] [2020-10-14 23:24:40,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:24:40,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:24:40,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:40,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:40,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:40,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:45,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:24:45,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 23:24:45,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:24:45,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 23:24:45,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:24:45,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:24:45,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:24:45,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:24:45,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 23:24:45,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:24:45,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:24:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:24:45,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:45,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:24:45,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:24:45,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:24:45,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:24:45,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:24:45,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:24:45,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:24:45,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:24:45,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:24:45,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:24:45,577 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:24:45,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620810685] [2020-10-14 23:24:45,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:24:45,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:24:45,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543498352] [2020-10-14 23:24:45,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:24:45,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:24:45,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:24:45,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:24:45,593 INFO L87 Difference]: Start difference. First operand 59 states and 76 transitions. Second operand 12 states. [2020-10-14 23:24:46,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:24:46,631 INFO L93 Difference]: Finished difference Result 69 states and 87 transitions. [2020-10-14 23:24:46,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:24:46,632 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-14 23:24:46,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:24:46,633 INFO L225 Difference]: With dead ends: 69 [2020-10-14 23:24:46,634 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 23:24:46,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:24:46,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 23:24:46,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2020-10-14 23:24:46,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 23:24:46,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2020-10-14 23:24:46,643 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 49 [2020-10-14 23:24:46,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:24:46,643 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2020-10-14 23:24:46,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:24:46,644 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2020-10-14 23:24:46,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 23:24:46,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:24:46,645 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:24:46,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 23:24:46,645 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:24:46,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:24:46,645 INFO L82 PathProgramCache]: Analyzing trace with hash -423229539, now seen corresponding path program 5 times [2020-10-14 23:24:46,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:24:46,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256192530] [2020-10-14 23:24:46,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:24:46,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:24:46,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:46,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:46,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:48,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:51,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:24:51,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 23:24:51,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:24:51,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 23:24:51,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:24:51,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:24:51,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:24:51,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:24:51,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 23:24:51,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:24:51,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:24:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:24:51,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:51,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:24:51,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:24:51,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:24:51,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:24:51,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:24:51,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:24:51,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:24:51,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:24:51,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:24:51,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:24:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:24:51,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256192530] [2020-10-14 23:24:51,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:24:51,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:24:51,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958437356] [2020-10-14 23:24:51,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:24:51,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:24:51,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:24:51,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:24:51,877 INFO L87 Difference]: Start difference. First operand 62 states and 80 transitions. Second operand 11 states. [2020-10-14 23:24:52,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:24:52,405 INFO L93 Difference]: Finished difference Result 107 states and 137 transitions. [2020-10-14 23:24:52,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:24:52,405 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-10-14 23:24:52,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:24:52,406 INFO L225 Difference]: With dead ends: 107 [2020-10-14 23:24:52,407 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 23:24:52,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:24:52,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 23:24:52,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-14 23:24:52,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 23:24:52,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2020-10-14 23:24:52,423 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 55 [2020-10-14 23:24:52,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:24:52,423 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2020-10-14 23:24:52,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:24:52,424 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2020-10-14 23:24:52,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 23:24:52,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:24:52,428 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:24:52,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 23:24:52,429 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:24:52,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:24:52,429 INFO L82 PathProgramCache]: Analyzing trace with hash 832360857, now seen corresponding path program 6 times [2020-10-14 23:24:52,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:24:52,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271079520] [2020-10-14 23:24:52,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:24:52,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:24:52,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:52,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:52,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:54,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:54,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:57,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:24:57,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 23:24:57,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:24:57,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 23:24:57,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:24:57,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:24:57,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:24:57,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:24:57,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 23:24:57,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:24:57,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:24:57,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:24:57,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:57,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:24:57,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:24:57,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:24:57,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:24:57,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:24:57,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:24:57,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:24:57,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:24:57,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:24:57,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:24:57,804 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:24:57,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271079520] [2020-10-14 23:24:57,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:24:57,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:24:57,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800410727] [2020-10-14 23:24:57,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:24:57,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:24:57,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:24:57,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:24:57,807 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand 14 states. [2020-10-14 23:24:59,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:24:59,883 INFO L93 Difference]: Finished difference Result 103 states and 131 transitions. [2020-10-14 23:24:59,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 23:24:59,884 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2020-10-14 23:24:59,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:24:59,886 INFO L225 Difference]: With dead ends: 103 [2020-10-14 23:24:59,886 INFO L226 Difference]: Without dead ends: 89 [2020-10-14 23:24:59,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=387, Invalid=873, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 23:24:59,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-14 23:24:59,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 72. [2020-10-14 23:24:59,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-14 23:24:59,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2020-10-14 23:24:59,896 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 60 [2020-10-14 23:24:59,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:24:59,896 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2020-10-14 23:24:59,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:24:59,896 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2020-10-14 23:24:59,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 23:24:59,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:24:59,898 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:24:59,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 23:24:59,898 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:24:59,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:24:59,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1036472351, now seen corresponding path program 3 times [2020-10-14 23:24:59,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:24:59,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442676124] [2020-10-14 23:24:59,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:24:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:24:59,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:59,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:00,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:01,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:01,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:04,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:04,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 23:25:04,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:25:04,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 23:25:04,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:04,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:04,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:25:04,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:25:04,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 23:25:04,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:05,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:05,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:05,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:05,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:05,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:05,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:05,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:25:05,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:05,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:05,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:05,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:05,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:05,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:05,240 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 18 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:05,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442676124] [2020-10-14 23:25:05,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:05,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:25:05,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463087002] [2020-10-14 23:25:05,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:25:05,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:05,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:25:05,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:25:05,243 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand 14 states. [2020-10-14 23:25:07,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:07,251 INFO L93 Difference]: Finished difference Result 82 states and 104 transitions. [2020-10-14 23:25:07,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:25:07,252 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-14 23:25:07,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:07,254 INFO L225 Difference]: With dead ends: 82 [2020-10-14 23:25:07,254 INFO L226 Difference]: Without dead ends: 80 [2020-10-14 23:25:07,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=285, Invalid=645, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:25:07,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-14 23:25:07,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2020-10-14 23:25:07,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-14 23:25:07,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 97 transitions. [2020-10-14 23:25:07,264 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 97 transitions. Word has length 62 [2020-10-14 23:25:07,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:07,264 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 97 transitions. [2020-10-14 23:25:07,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:25:07,264 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 97 transitions. [2020-10-14 23:25:07,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 23:25:07,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:07,265 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:07,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 23:25:07,266 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:07,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:07,266 INFO L82 PathProgramCache]: Analyzing trace with hash -799273977, now seen corresponding path program 7 times [2020-10-14 23:25:07,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:07,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131267880] [2020-10-14 23:25:07,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:07,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:07,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:07,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:07,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:12,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:12,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 23:25:12,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:25:12,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 23:25:12,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:12,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:12,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:25:12,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-14 23:25:12,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 23:25:12,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:12,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:12,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:12,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:12,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:12,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:12,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:12,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:25:12,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:12,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:12,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:12,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:12,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:12,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-14 23:25:12,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131267880] [2020-10-14 23:25:12,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:25:12,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 23:25:12,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935196034] [2020-10-14 23:25:12,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:25:12,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:12,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:25:12,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:25:12,353 INFO L87 Difference]: Start difference. First operand 75 states and 97 transitions. Second operand 6 states. [2020-10-14 23:25:12,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:12,506 INFO L93 Difference]: Finished difference Result 149 states and 185 transitions. [2020-10-14 23:25:12,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:25:12,508 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-14 23:25:12,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:12,509 INFO L225 Difference]: With dead ends: 149 [2020-10-14 23:25:12,509 INFO L226 Difference]: Without dead ends: 111 [2020-10-14 23:25:12,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:25:12,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-14 23:25:12,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 87. [2020-10-14 23:25:12,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-14 23:25:12,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2020-10-14 23:25:12,537 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 68 [2020-10-14 23:25:12,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:12,538 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2020-10-14 23:25:12,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:25:12,538 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2020-10-14 23:25:12,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 23:25:12,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:12,542 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:12,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 23:25:12,542 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:12,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:12,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1073422081, now seen corresponding path program 1 times [2020-10-14 23:25:12,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:12,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612322664] [2020-10-14 23:25:12,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:12,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:12,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:13,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:13,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 23:25:13,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:13,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 586 [2020-10-14 23:25:13,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:13,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:13,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:25:13,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:13,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 23:25:13,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:13,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:13,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:13,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:13,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:13,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:13,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:25:13,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:13,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:13,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:13,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:13,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:13,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:13,467 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 16 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:13,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612322664] [2020-10-14 23:25:13,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:13,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:25:13,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580216675] [2020-10-14 23:25:13,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:25:13,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:13,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:25:13,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:25:13,469 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand 13 states. [2020-10-14 23:25:14,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:14,176 INFO L93 Difference]: Finished difference Result 153 states and 189 transitions. [2020-10-14 23:25:14,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:25:14,176 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 68 [2020-10-14 23:25:14,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:14,178 INFO L225 Difference]: With dead ends: 153 [2020-10-14 23:25:14,178 INFO L226 Difference]: Without dead ends: 92 [2020-10-14 23:25:14,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:25:14,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-14 23:25:14,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-10-14 23:25:14,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-14 23:25:14,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2020-10-14 23:25:14,188 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 68 [2020-10-14 23:25:14,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:14,189 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2020-10-14 23:25:14,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:25:14,189 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2020-10-14 23:25:14,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 23:25:14,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:14,190 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:14,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 23:25:14,190 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:14,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:14,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1165021053, now seen corresponding path program 2 times [2020-10-14 23:25:14,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:14,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457122644] [2020-10-14 23:25:14,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:14,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:14,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:14,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:15,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:15,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 23:25:15,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:25:15,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 775 [2020-10-14 23:25:15,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:15,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:15,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:25:15,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:25:15,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 23:25:15,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:15,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:15,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:15,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:15,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:15,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:15,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:25:15,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:15,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:15,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:15,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:15,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:15,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:15,593 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 23 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:15,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457122644] [2020-10-14 23:25:15,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:15,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:25:15,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024988484] [2020-10-14 23:25:15,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:25:15,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:15,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:25:15,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:25:15,596 INFO L87 Difference]: Start difference. First operand 92 states and 116 transitions. Second operand 16 states. [2020-10-14 23:25:16,468 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-14 23:25:16,646 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-14 23:25:16,875 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 23:25:17,084 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-14 23:25:17,265 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-14 23:25:17,440 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-14 23:25:17,606 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-14 23:25:17,779 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-14 23:25:17,934 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-14 23:25:18,096 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-14 23:25:18,260 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-14 23:25:18,430 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-14 23:25:18,746 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-14 23:25:18,893 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-14 23:25:19,055 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-14 23:25:20,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:20,071 INFO L93 Difference]: Finished difference Result 129 states and 160 transitions. [2020-10-14 23:25:20,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 23:25:20,071 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-10-14 23:25:20,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:20,073 INFO L225 Difference]: With dead ends: 129 [2020-10-14 23:25:20,073 INFO L226 Difference]: Without dead ends: 114 [2020-10-14 23:25:20,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=559, Invalid=1247, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 23:25:20,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-14 23:25:20,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 100. [2020-10-14 23:25:20,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-14 23:25:20,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 125 transitions. [2020-10-14 23:25:20,084 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 125 transitions. Word has length 73 [2020-10-14 23:25:20,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:20,085 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 125 transitions. [2020-10-14 23:25:20,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:25:20,085 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 125 transitions. [2020-10-14 23:25:20,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 23:25:20,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:20,086 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:20,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 23:25:20,086 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:20,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:20,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1117121781, now seen corresponding path program 1 times [2020-10-14 23:25:20,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:20,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674449471] [2020-10-14 23:25:20,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:20,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:20,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:20,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:20,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 23:25:20,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:20,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 534 [2020-10-14 23:25:20,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:20,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:20,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:25:20,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:25:20,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 23:25:20,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:21,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:21,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:21,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:21,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:21,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:21,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:21,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:25:21,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:21,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:21,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:21,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:21,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:21,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 23 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:21,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674449471] [2020-10-14 23:25:21,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:21,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:25:21,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112762713] [2020-10-14 23:25:21,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:25:21,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:21,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:25:21,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:25:21,134 INFO L87 Difference]: Start difference. First operand 100 states and 125 transitions. Second operand 16 states. [2020-10-14 23:25:21,719 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-14 23:25:21,950 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-10-14 23:25:22,233 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 159 [2020-10-14 23:25:22,620 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 164 [2020-10-14 23:25:22,913 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 163 [2020-10-14 23:25:23,207 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 145 [2020-10-14 23:25:23,493 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 150 [2020-10-14 23:25:23,761 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 149 [2020-10-14 23:25:24,035 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 131 [2020-10-14 23:25:24,322 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 136 [2020-10-14 23:25:24,581 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 135 [2020-10-14 23:25:24,830 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 117 [2020-10-14 23:25:25,080 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 122 [2020-10-14 23:25:25,309 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 121 [2020-10-14 23:25:25,537 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 104 [2020-10-14 23:25:25,770 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 108 [2020-10-14 23:25:25,984 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 107 [2020-10-14 23:25:26,210 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2020-10-14 23:25:26,409 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 95 [2020-10-14 23:25:26,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:26,436 INFO L93 Difference]: Finished difference Result 111 states and 137 transitions. [2020-10-14 23:25:26,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:25:26,437 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2020-10-14 23:25:26,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:26,438 INFO L225 Difference]: With dead ends: 111 [2020-10-14 23:25:26,438 INFO L226 Difference]: Without dead ends: 109 [2020-10-14 23:25:26,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=410, Invalid=922, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 23:25:26,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-14 23:25:26,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2020-10-14 23:25:26,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-14 23:25:26,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 129 transitions. [2020-10-14 23:25:26,450 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 129 transitions. Word has length 75 [2020-10-14 23:25:26,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:26,450 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 129 transitions. [2020-10-14 23:25:26,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:25:26,451 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 129 transitions. [2020-10-14 23:25:26,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 23:25:26,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:26,451 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:26,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 23:25:26,452 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:26,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:26,452 INFO L82 PathProgramCache]: Analyzing trace with hash -684670161, now seen corresponding path program 3 times [2020-10-14 23:25:26,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:26,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031213487] [2020-10-14 23:25:26,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:26,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:26,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:27,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:27,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 23:25:27,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:27,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 543 [2020-10-14 23:25:27,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:27,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:27,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:25:27,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:27,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 23:25:27,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:27,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:27,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:27,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:27,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:27,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:27,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:27,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 23:25:27,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:27,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:27,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:27,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:27,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:27,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:27,572 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 20 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:27,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031213487] [2020-10-14 23:25:27,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:27,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:25:27,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162939247] [2020-10-14 23:25:27,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:25:27,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:27,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:25:27,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:25:27,574 INFO L87 Difference]: Start difference. First operand 103 states and 129 transitions. Second operand 15 states. [2020-10-14 23:25:28,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:28,655 INFO L93 Difference]: Finished difference Result 180 states and 222 transitions. [2020-10-14 23:25:28,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:25:28,655 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 81 [2020-10-14 23:25:28,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:28,657 INFO L225 Difference]: With dead ends: 180 [2020-10-14 23:25:28,657 INFO L226 Difference]: Without dead ends: 108 [2020-10-14 23:25:28,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:25:28,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-14 23:25:28,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-10-14 23:25:28,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-14 23:25:28,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 136 transitions. [2020-10-14 23:25:28,669 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 136 transitions. Word has length 81 [2020-10-14 23:25:28,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:28,669 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 136 transitions. [2020-10-14 23:25:28,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:25:28,669 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 136 transitions. [2020-10-14 23:25:28,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-14 23:25:28,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:28,670 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:28,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 23:25:28,671 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:28,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:28,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1267021269, now seen corresponding path program 4 times [2020-10-14 23:25:28,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:28,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111836948] [2020-10-14 23:25:28,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:28,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:29,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:30,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:30,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-14 23:25:30,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:25:30,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2107 [2020-10-14 23:25:30,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:30,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:30,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:25:30,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:25:30,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-14 23:25:30,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:31,460 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-10-14 23:25:32,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:32,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:32,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:32,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:32,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:32,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:32,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:25:32,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:32,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:32,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:32,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:32,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:32,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 33 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:32,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111836948] [2020-10-14 23:25:32,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:32,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:25:32,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738946871] [2020-10-14 23:25:32,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:25:32,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:32,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:25:32,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:25:32,272 INFO L87 Difference]: Start difference. First operand 108 states and 136 transitions. Second operand 18 states. [2020-10-14 23:25:33,072 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 83 [2020-10-14 23:25:33,378 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 96 [2020-10-14 23:25:33,858 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 174 [2020-10-14 23:25:34,349 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 177 [2020-10-14 23:25:34,920 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 176 [2020-10-14 23:25:35,417 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 178 [2020-10-14 23:25:35,856 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 161 [2020-10-14 23:25:36,290 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 164 [2020-10-14 23:25:36,732 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 163 [2020-10-14 23:25:37,193 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 165 [2020-10-14 23:25:37,584 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 148 [2020-10-14 23:25:37,983 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 151 [2020-10-14 23:25:38,381 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 150 [2020-10-14 23:25:38,796 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 152 [2020-10-14 23:25:39,138 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 135 [2020-10-14 23:25:39,504 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 138 [2020-10-14 23:25:39,870 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 137 [2020-10-14 23:25:40,244 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 139 [2020-10-14 23:25:40,553 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 122 [2020-10-14 23:25:40,874 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 125 [2020-10-14 23:25:41,185 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 124 [2020-10-14 23:25:41,509 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 126 [2020-10-14 23:25:41,772 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 109 [2020-10-14 23:25:42,062 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 112 [2020-10-14 23:25:42,361 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 111 [2020-10-14 23:25:42,671 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 113 [2020-10-14 23:25:42,969 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 98 [2020-10-14 23:25:43,235 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 100 [2020-10-14 23:25:43,483 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 98 [2020-10-14 23:25:43,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:43,497 INFO L93 Difference]: Finished difference Result 145 states and 180 transitions. [2020-10-14 23:25:43,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 23:25:43,498 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 86 [2020-10-14 23:25:43,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:43,500 INFO L225 Difference]: With dead ends: 145 [2020-10-14 23:25:43,500 INFO L226 Difference]: Without dead ends: 130 [2020-10-14 23:25:43,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=760, Invalid=1690, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 23:25:43,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-14 23:25:43,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 116. [2020-10-14 23:25:43,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-14 23:25:43,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 145 transitions. [2020-10-14 23:25:43,511 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 145 transitions. Word has length 86 [2020-10-14 23:25:43,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:43,511 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 145 transitions. [2020-10-14 23:25:43,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:25:43,511 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 145 transitions. [2020-10-14 23:25:43,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-14 23:25:43,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:43,512 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:43,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 23:25:43,512 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:43,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:43,513 INFO L82 PathProgramCache]: Analyzing trace with hash -355081549, now seen corresponding path program 2 times [2020-10-14 23:25:43,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:43,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268545399] [2020-10-14 23:25:43,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:43,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:44,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:44,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 23:25:44,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:44,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 840 [2020-10-14 23:25:44,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:44,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:44,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:25:44,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:25:44,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-14 23:25:44,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:44,915 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2020-10-14 23:25:45,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:45,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:45,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:45,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:45,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:45,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:45,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 23:25:45,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:45,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:45,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:45,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:45,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:45,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 28 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:45,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268545399] [2020-10-14 23:25:45,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:45,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:25:45,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533487596] [2020-10-14 23:25:45,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:25:45,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:45,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:25:45,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:25:45,442 INFO L87 Difference]: Start difference. First operand 116 states and 145 transitions. Second operand 18 states. [2020-10-14 23:25:46,025 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2020-10-14 23:25:46,336 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 95 [2020-10-14 23:25:46,658 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 109 [2020-10-14 23:25:47,070 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 191 [2020-10-14 23:25:47,635 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 196 [2020-10-14 23:25:48,075 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 195 [2020-10-14 23:25:48,513 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 177 [2020-10-14 23:25:48,960 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 182 [2020-10-14 23:25:49,378 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 181 [2020-10-14 23:25:49,786 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 163 [2020-10-14 23:25:50,202 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 168 [2020-10-14 23:25:50,584 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 167 [2020-10-14 23:25:50,973 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 149 [2020-10-14 23:25:51,384 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 154 [2020-10-14 23:25:51,744 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 153 [2020-10-14 23:25:52,112 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 135 [2020-10-14 23:25:52,489 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 140 [2020-10-14 23:25:52,837 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 139 [2020-10-14 23:25:53,197 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 121 [2020-10-14 23:25:53,555 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 126 [2020-10-14 23:25:53,888 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 125 [2020-10-14 23:25:54,263 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 111 [2020-10-14 23:25:54,576 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 113 [2020-10-14 23:25:54,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:54,608 INFO L93 Difference]: Finished difference Result 127 states and 157 transitions. [2020-10-14 23:25:54,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 23:25:54,609 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 88 [2020-10-14 23:25:54,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:54,610 INFO L225 Difference]: With dead ends: 127 [2020-10-14 23:25:54,610 INFO L226 Difference]: Without dead ends: 125 [2020-10-14 23:25:54,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=558, Invalid=1248, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 23:25:54,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-14 23:25:54,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 119. [2020-10-14 23:25:54,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-14 23:25:54,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 149 transitions. [2020-10-14 23:25:54,624 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 149 transitions. Word has length 88 [2020-10-14 23:25:54,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:54,625 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 149 transitions. [2020-10-14 23:25:54,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:25:54,625 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 149 transitions. [2020-10-14 23:25:54,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-14 23:25:54,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:54,626 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:54,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 23:25:54,626 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:54,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:54,627 INFO L82 PathProgramCache]: Analyzing trace with hash -379833129, now seen corresponding path program 5 times [2020-10-14 23:25:54,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:54,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175585265] [2020-10-14 23:25:54,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:54,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:55,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:55,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-14 23:25:55,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:55,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 763 [2020-10-14 23:25:55,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:55,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:55,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:25:55,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:55,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-14 23:25:55,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:56,042 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-14 23:25:56,373 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 73 [2020-10-14 23:25:56,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:56,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:56,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:56,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:56,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:56,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:25:56,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:56,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:56,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:56,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:56,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:56,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 24 proven. 219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:56,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175585265] [2020-10-14 23:25:56,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:56,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:25:56,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015219490] [2020-10-14 23:25:56,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:25:56,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:56,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:25:56,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:25:56,901 INFO L87 Difference]: Start difference. First operand 119 states and 149 transitions. Second operand 17 states. [2020-10-14 23:25:58,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:58,445 INFO L93 Difference]: Finished difference Result 207 states and 255 transitions. [2020-10-14 23:25:58,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:25:58,446 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 94 [2020-10-14 23:25:58,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:58,448 INFO L225 Difference]: With dead ends: 207 [2020-10-14 23:25:58,448 INFO L226 Difference]: Without dead ends: 124 [2020-10-14 23:25:58,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:25:58,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-14 23:25:58,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-10-14 23:25:58,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-14 23:25:58,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 156 transitions. [2020-10-14 23:25:58,460 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 156 transitions. Word has length 94 [2020-10-14 23:25:58,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:58,460 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 156 transitions. [2020-10-14 23:25:58,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:25:58,461 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 156 transitions. [2020-10-14 23:25:58,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-14 23:25:58,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:58,462 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:58,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 23:25:58,462 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:58,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:58,463 INFO L82 PathProgramCache]: Analyzing trace with hash -44144805, now seen corresponding path program 6 times [2020-10-14 23:25:58,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:58,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316336467] [2020-10-14 23:25:58,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:58,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:58,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:59,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:00,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:00,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-14 23:26:00,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:26:00,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1897 [2020-10-14 23:26:00,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:00,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:00,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:26:00,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:26:00,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-14 23:26:00,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:01,007 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2020-10-14 23:26:01,263 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 81 [2020-10-14 23:26:01,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:26:01,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:01,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:01,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:01,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:26:01,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:01,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:26:01,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:01,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:01,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:26:01,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:26:01,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:26:01,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:02,071 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 39 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:26:02,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316336467] [2020-10-14 23:26:02,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:26:02,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:26:02,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738285245] [2020-10-14 23:26:02,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:26:02,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:26:02,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:26:02,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:26:02,075 INFO L87 Difference]: Start difference. First operand 124 states and 156 transitions. Second operand 20 states. [2020-10-14 23:26:02,903 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 83 [2020-10-14 23:26:03,298 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 99 [2020-10-14 23:26:03,746 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 112 [2020-10-14 23:26:04,378 WARN L193 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 203 [2020-10-14 23:26:05,068 WARN L193 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 206 [2020-10-14 23:26:05,880 WARN L193 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 205 [2020-10-14 23:26:06,584 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 207 [2020-10-14 23:26:07,241 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 190 [2020-10-14 23:26:07,866 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 193 [2020-10-14 23:26:08,500 WARN L193 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 192 [2020-10-14 23:26:09,147 WARN L193 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 194 [2020-10-14 23:26:09,733 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 177 [2020-10-14 23:26:10,329 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 180 [2020-10-14 23:26:10,899 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 179 [2020-10-14 23:26:11,512 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 181 [2020-10-14 23:26:12,029 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 164 [2020-10-14 23:26:12,569 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 167 [2020-10-14 23:26:13,082 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 166 [2020-10-14 23:26:13,618 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 168 [2020-10-14 23:26:14,110 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 151 [2020-10-14 23:26:14,596 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 154 [2020-10-14 23:26:15,084 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 153 [2020-10-14 23:26:15,599 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 155 [2020-10-14 23:26:16,052 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 138 [2020-10-14 23:26:16,520 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 141 [2020-10-14 23:26:16,970 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 140 [2020-10-14 23:26:17,456 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 142 [2020-10-14 23:26:17,881 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 125 [2020-10-14 23:26:18,331 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 128 [2020-10-14 23:26:18,769 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 127 [2020-10-14 23:26:19,198 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 129 [2020-10-14 23:26:19,615 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 114 [2020-10-14 23:26:20,016 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 116 [2020-10-14 23:26:20,412 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 114 [2020-10-14 23:26:20,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:26:20,426 INFO L93 Difference]: Finished difference Result 161 states and 200 transitions. [2020-10-14 23:26:20,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 23:26:20,427 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 99 [2020-10-14 23:26:20,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:26:20,429 INFO L225 Difference]: With dead ends: 161 [2020-10-14 23:26:20,429 INFO L226 Difference]: Without dead ends: 146 [2020-10-14 23:26:20,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=996, Invalid=2196, Unknown=0, NotChecked=0, Total=3192 [2020-10-14 23:26:20,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-14 23:26:20,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 132. [2020-10-14 23:26:20,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-14 23:26:20,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 165 transitions. [2020-10-14 23:26:20,445 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 165 transitions. Word has length 99 [2020-10-14 23:26:20,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:26:20,446 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 165 transitions. [2020-10-14 23:26:20,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:26:20,446 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 165 transitions. [2020-10-14 23:26:20,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-14 23:26:20,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:26:20,447 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:26:20,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 23:26:20,447 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:26:20,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:26:20,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1991838749, now seen corresponding path program 3 times [2020-10-14 23:26:20,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:26:20,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455924493] [2020-10-14 23:26:20,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:26:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:20,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:22,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:22,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-14 23:26:22,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:22,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1585 [2020-10-14 23:26:22,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:22,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:22,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:26:22,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:26:22,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-14 23:26:22,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:23,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:26:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:23,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:23,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:23,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:26:23,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:23,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:26:23,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:23,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:23,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:26:23,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:26:23,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:26:23,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 33 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:26:23,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455924493] [2020-10-14 23:26:23,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:26:23,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:26:23,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133096693] [2020-10-14 23:26:23,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:26:23,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:26:23,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:26:23,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:26:23,276 INFO L87 Difference]: Start difference. First operand 132 states and 165 transitions. Second operand 20 states. [2020-10-14 23:26:23,987 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-10-14 23:26:24,275 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-10-14 23:26:24,665 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 105 [2020-10-14 23:26:25,160 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 119 [2020-10-14 23:26:25,757 WARN L193 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 215 [2020-10-14 23:26:26,482 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 220 [2020-10-14 23:26:27,054 WARN L193 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 219 [2020-10-14 23:26:27,642 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 201 [2020-10-14 23:26:28,224 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 206 [2020-10-14 23:26:28,760 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 205 [2020-10-14 23:26:29,328 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 187 [2020-10-14 23:26:29,902 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 192 [2020-10-14 23:26:30,410 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 191 [2020-10-14 23:26:30,928 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 173 [2020-10-14 23:26:31,475 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 178 [2020-10-14 23:26:31,993 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 177 [2020-10-14 23:26:32,499 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 159 [2020-10-14 23:26:32,990 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 164 [2020-10-14 23:26:33,472 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 163 [2020-10-14 23:26:34,046 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 145 [2020-10-14 23:26:34,510 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 150 [2020-10-14 23:26:34,954 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 149 [2020-10-14 23:26:35,396 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 131 [2020-10-14 23:26:35,945 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 136 [2020-10-14 23:26:36,379 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 135 [2020-10-14 23:26:36,848 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 121 [2020-10-14 23:26:37,249 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 123 [2020-10-14 23:26:37,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:26:37,283 INFO L93 Difference]: Finished difference Result 143 states and 177 transitions. [2020-10-14 23:26:37,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 23:26:37,287 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2020-10-14 23:26:37,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:26:37,288 INFO L225 Difference]: With dead ends: 143 [2020-10-14 23:26:37,288 INFO L226 Difference]: Without dead ends: 141 [2020-10-14 23:26:37,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=729, Invalid=1623, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 23:26:37,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-14 23:26:37,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 135. [2020-10-14 23:26:37,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-14 23:26:37,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 169 transitions. [2020-10-14 23:26:37,304 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 169 transitions. Word has length 101 [2020-10-14 23:26:37,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:26:37,304 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 169 transitions. [2020-10-14 23:26:37,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:26:37,304 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 169 transitions. [2020-10-14 23:26:37,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-14 23:26:37,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:26:37,305 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:26:37,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 23:26:37,306 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:26:37,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:26:37,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1680318983, now seen corresponding path program 7 times [2020-10-14 23:26:37,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:26:37,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100618978] [2020-10-14 23:26:37,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:26:37,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:37,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:38,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:38,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-14 23:26:38,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:38,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1183 [2020-10-14 23:26:38,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:38,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:38,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:26:38,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:26:38,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-14 23:26:38,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:39,566 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2020-10-14 23:26:39,843 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 51 [2020-10-14 23:26:40,576 WARN L193 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 84 [2020-10-14 23:26:40,756 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 36 [2020-10-14 23:26:40,943 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 36 [2020-10-14 23:26:41,115 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 32 [2020-10-14 23:26:41,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:26:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:41,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:41,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:41,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:26:41,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:41,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:26:41,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:41,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:41,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:26:41,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:26:41,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:26:41,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:41,585 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 28 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:26:41,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100618978] [2020-10-14 23:26:41,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:26:41,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:26:41,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515506243] [2020-10-14 23:26:41,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:26:41,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:26:41,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:26:41,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:26:41,586 INFO L87 Difference]: Start difference. First operand 135 states and 169 transitions. Second operand 19 states. [2020-10-14 23:26:43,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:26:43,689 INFO L93 Difference]: Finished difference Result 234 states and 288 transitions. [2020-10-14 23:26:43,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:26:43,690 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 107 [2020-10-14 23:26:43,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:26:43,692 INFO L225 Difference]: With dead ends: 234 [2020-10-14 23:26:43,692 INFO L226 Difference]: Without dead ends: 140 [2020-10-14 23:26:43,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=71, Invalid=685, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:26:43,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-14 23:26:43,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-10-14 23:26:43,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-14 23:26:43,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2020-10-14 23:26:43,709 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 107 [2020-10-14 23:26:43,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:26:43,709 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2020-10-14 23:26:43,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:26:43,710 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2020-10-14 23:26:43,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-14 23:26:43,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:26:43,711 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:26:43,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 23:26:43,711 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:26:43,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:26:43,712 INFO L82 PathProgramCache]: Analyzing trace with hash 723691011, now seen corresponding path program 8 times [2020-10-14 23:26:43,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:26:43,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29146533] [2020-10-14 23:26:43,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:26:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:44,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:47,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:47,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:47,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-14 23:26:47,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:26:47,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3656 [2020-10-14 23:26:47,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:47,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:47,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:26:47,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:26:47,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-14 23:26:47,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:48,400 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-10-14 23:26:48,685 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 75 [2020-10-14 23:26:49,233 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 86 [2020-10-14 23:26:49,421 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 48 [2020-10-14 23:26:49,606 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 48 [2020-10-14 23:26:49,782 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 44 [2020-10-14 23:26:50,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:26:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:50,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:50,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:50,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:26:50,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:50,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:26:50,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:50,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:50,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:26:50,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:26:50,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:26:50,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 38 proven. 329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:26:50,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29146533] [2020-10-14 23:26:50,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:26:50,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:26:50,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913667611] [2020-10-14 23:26:50,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:26:50,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:26:50,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:26:50,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:26:50,518 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand 22 states. [2020-10-14 23:26:51,176 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-14 23:26:51,465 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 73 [2020-10-14 23:26:51,841 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 90 [2020-10-14 23:26:52,348 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 111 [2020-10-14 23:26:52,950 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 123 [2020-10-14 23:26:53,626 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 136 [2020-10-14 23:26:54,568 WARN L193 SmtUtils]: Spent 858.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 240 [2020-10-14 23:26:55,581 WARN L193 SmtUtils]: Spent 934.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 243 [2020-10-14 23:26:56,681 WARN L193 SmtUtils]: Spent 897.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 242 [2020-10-14 23:26:57,651 WARN L193 SmtUtils]: Spent 883.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 244 [2020-10-14 23:26:58,549 WARN L193 SmtUtils]: Spent 788.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 227 [2020-10-14 23:26:59,537 WARN L193 SmtUtils]: Spent 902.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 230 [2020-10-14 23:27:00,444 WARN L193 SmtUtils]: Spent 809.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 229 [2020-10-14 23:27:01,348 WARN L193 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 231 [2020-10-14 23:27:02,192 WARN L193 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 214 [2020-10-14 23:27:03,069 WARN L193 SmtUtils]: Spent 787.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 217 [2020-10-14 23:27:03,915 WARN L193 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 216 [2020-10-14 23:27:04,807 WARN L193 SmtUtils]: Spent 793.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 218 [2020-10-14 23:27:05,629 WARN L193 SmtUtils]: Spent 711.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 201 [2020-10-14 23:27:06,433 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 204 [2020-10-14 23:27:07,247 WARN L193 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 203 [2020-10-14 23:27:08,087 WARN L193 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 205 [2020-10-14 23:27:08,817 WARN L193 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 188 [2020-10-14 23:27:09,695 WARN L193 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 191 [2020-10-14 23:27:10,483 WARN L193 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 190 [2020-10-14 23:27:11,269 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 192 [2020-10-14 23:27:11,957 WARN L193 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 175 [2020-10-14 23:27:12,673 WARN L193 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 178 [2020-10-14 23:27:13,446 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 177 [2020-10-14 23:27:14,181 WARN L193 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 179 [2020-10-14 23:27:14,867 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 162 [2020-10-14 23:27:15,546 WARN L193 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 165 [2020-10-14 23:27:16,220 WARN L193 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 164 [2020-10-14 23:27:16,891 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 166 [2020-10-14 23:27:17,506 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 149 [2020-10-14 23:27:18,130 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 152 [2020-10-14 23:27:18,754 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 151 [2020-10-14 23:27:19,389 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 153 [2020-10-14 23:27:20,017 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 138 [2020-10-14 23:27:20,672 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 140 [2020-10-14 23:27:21,247 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 138 [2020-10-14 23:27:21,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:27:21,261 INFO L93 Difference]: Finished difference Result 177 states and 220 transitions. [2020-10-14 23:27:21,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-14 23:27:21,262 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 112 [2020-10-14 23:27:21,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:27:21,263 INFO L225 Difference]: With dead ends: 177 [2020-10-14 23:27:21,263 INFO L226 Difference]: Without dead ends: 162 [2020-10-14 23:27:21,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 31.4s TimeCoverageRelationStatistics Valid=1267, Invalid=2765, Unknown=0, NotChecked=0, Total=4032 [2020-10-14 23:27:21,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-14 23:27:21,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 148. [2020-10-14 23:27:21,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-14 23:27:21,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 185 transitions. [2020-10-14 23:27:21,283 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 185 transitions. Word has length 112 [2020-10-14 23:27:21,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:27:21,283 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 185 transitions. [2020-10-14 23:27:21,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:27:21,283 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 185 transitions. [2020-10-14 23:27:21,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-14 23:27:21,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:27:21,285 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:27:21,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 23:27:21,285 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:27:21,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:27:21,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1458972811, now seen corresponding path program 4 times [2020-10-14 23:27:21,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:27:21,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181000400] [2020-10-14 23:27:21,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:27:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:21,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:23,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:23,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-14 23:27:23,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:27:23,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2261 [2020-10-14 23:27:23,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:23,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:23,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:27:23,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:27:23,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-14 23:27:23,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:24,254 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2020-10-14 23:27:24,525 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 87 [2020-10-14 23:27:24,902 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 90 [2020-10-14 23:27:25,289 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 104 [2020-10-14 23:27:25,710 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 123 [2020-10-14 23:27:26,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:27:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:26,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:26,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:26,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:27:26,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:27:26,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:27:26,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:26,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:26,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:27:26,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:27:26,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:27:26,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:26,811 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 38 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:27:26,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181000400] [2020-10-14 23:27:26,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:27:26,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:27:26,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090542437] [2020-10-14 23:27:26,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:27:26,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:27:26,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:27:26,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:27:26,813 INFO L87 Difference]: Start difference. First operand 148 states and 185 transitions. Second operand 22 states. [2020-10-14 23:27:27,475 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-14 23:27:27,778 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 83 [2020-10-14 23:27:28,205 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 99 [2020-10-14 23:27:28,746 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 119 [2020-10-14 23:27:29,445 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 136 [2020-10-14 23:27:30,217 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 150 [2020-10-14 23:27:31,452 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 428 DAG size of output: 260 [2020-10-14 23:27:32,609 WARN L193 SmtUtils]: Spent 863.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 265 [2020-10-14 23:27:33,577 WARN L193 SmtUtils]: Spent 848.00 ms on a formula simplification. DAG size of input: 432 DAG size of output: 264 [2020-10-14 23:27:34,565 WARN L193 SmtUtils]: Spent 774.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 246 [2020-10-14 23:27:35,574 WARN L193 SmtUtils]: Spent 867.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 251 [2020-10-14 23:27:36,521 WARN L193 SmtUtils]: Spent 807.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 250 [2020-10-14 23:27:37,485 WARN L193 SmtUtils]: Spent 734.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 232 [2020-10-14 23:27:38,462 WARN L193 SmtUtils]: Spent 784.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 237 [2020-10-14 23:27:39,354 WARN L193 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 236 [2020-10-14 23:27:40,289 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 218 [2020-10-14 23:27:41,230 WARN L193 SmtUtils]: Spent 757.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 223 [2020-10-14 23:27:42,121 WARN L193 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 222 [2020-10-14 23:27:43,020 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 204 [2020-10-14 23:27:43,960 WARN L193 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 209 [2020-10-14 23:27:44,849 WARN L193 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 208 [2020-10-14 23:27:45,750 WARN L193 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 190 [2020-10-14 23:27:46,703 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 195 [2020-10-14 23:27:47,607 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 194 [2020-10-14 23:27:48,485 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 176 [2020-10-14 23:27:49,354 WARN L193 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 181 [2020-10-14 23:27:50,206 WARN L193 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 180 [2020-10-14 23:27:51,057 WARN L193 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 162 [2020-10-14 23:27:51,925 WARN L193 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 167 [2020-10-14 23:27:52,754 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 166 [2020-10-14 23:27:53,611 WARN L193 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 152 [2020-10-14 23:27:54,412 WARN L193 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 154 [2020-10-14 23:27:54,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:27:54,460 INFO L93 Difference]: Finished difference Result 159 states and 197 transitions. [2020-10-14 23:27:54,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 23:27:54,461 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 114 [2020-10-14 23:27:54,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:27:54,463 INFO L225 Difference]: With dead ends: 159 [2020-10-14 23:27:54,464 INFO L226 Difference]: Without dead ends: 157 [2020-10-14 23:27:54,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=923, Invalid=2047, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 23:27:54,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-14 23:27:54,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 151. [2020-10-14 23:27:54,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-14 23:27:54,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 189 transitions. [2020-10-14 23:27:54,487 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 189 transitions. Word has length 114 [2020-10-14 23:27:54,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:27:54,488 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 189 transitions. [2020-10-14 23:27:54,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:27:54,488 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 189 transitions. [2020-10-14 23:27:54,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-14 23:27:54,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:27:54,491 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:27:54,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 23:27:54,491 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:27:54,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:27:54,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1840691375, now seen corresponding path program 9 times [2020-10-14 23:27:54,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:27:54,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599810786] [2020-10-14 23:27:54,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:27:54,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:54,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:56,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:56,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-14 23:27:56,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:27:56,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1901 [2020-10-14 23:27:56,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:56,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:56,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:27:56,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:27:56,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-14 23:27:56,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:57,206 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-10-14 23:27:57,480 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2020-10-14 23:27:58,000 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 72 [2020-10-14 23:27:58,959 WARN L193 SmtUtils]: Spent 900.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 99 [2020-10-14 23:28:00,353 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 183 DAG size of output: 125 [2020-10-14 23:28:00,528 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 40 [2020-10-14 23:28:00,709 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 40 [2020-10-14 23:28:01,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:28:01,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:28:01,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:01,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:28:01,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:28:01,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:28:01,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:28:01,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:28:01,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:28:01,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:28:01,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:28:01,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:28:01,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:28:01,614 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 32 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:28:01,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599810786] [2020-10-14 23:28:01,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:28:01,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:28:01,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265941999] [2020-10-14 23:28:01,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:28:01,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:28:01,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:28:01,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:28:01,616 INFO L87 Difference]: Start difference. First operand 151 states and 189 transitions. Second operand 21 states. [2020-10-14 23:28:04,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:28:04,945 INFO L93 Difference]: Finished difference Result 261 states and 321 transitions. [2020-10-14 23:28:04,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:28:04,945 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 120 [2020-10-14 23:28:04,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:28:04,948 INFO L225 Difference]: With dead ends: 261 [2020-10-14 23:28:04,948 INFO L226 Difference]: Without dead ends: 156 [2020-10-14 23:28:04,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:28:04,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-14 23:28:04,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2020-10-14 23:28:04,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-14 23:28:04,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 196 transitions. [2020-10-14 23:28:04,968 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 196 transitions. Word has length 120 [2020-10-14 23:28:04,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:28:04,968 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 196 transitions. [2020-10-14 23:28:04,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:28:04,968 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 196 transitions. [2020-10-14 23:28:04,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-14 23:28:04,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:28:04,969 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:28:04,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 23:28:04,969 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:28:04,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:28:04,969 INFO L82 PathProgramCache]: Analyzing trace with hash 105582131, now seen corresponding path program 10 times [2020-10-14 23:28:04,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:28:04,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301772658] [2020-10-14 23:28:04,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:28:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:28:05,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:07,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:08,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:28:08,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-14 23:28:08,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:28:08,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3651 [2020-10-14 23:28:08,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:28:08,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:28:08,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:28:08,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:28:08,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-14 23:28:08,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0