/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=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-simple/sll2n_append_unequal.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:40:33,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:40:33,300 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:40:33,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:40:33,343 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:40:33,354 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:40:33,356 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:40:33,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:40:33,362 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:40:33,365 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:40:33,366 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:40:33,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:40:33,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:40:33,369 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:40:33,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:40:33,373 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:40:33,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:40:33,377 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:40:33,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:40:33,386 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:40:33,387 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:40:33,389 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:40:33,390 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:40:33,391 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:40:33,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:40:33,394 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:40:33,395 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:40:33,397 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:40:33,398 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:40:33,398 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:40:33,399 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:40:33,399 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:40:33,400 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:40:33,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:40:33,401 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:40:33,402 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:40:33,402 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:40:33,403 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:40:33,403 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:40:33,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:40:33,404 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:40:33,405 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 [2020-10-13 10:40:33,426 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:40:33,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:40:33,427 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:40:33,427 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:40:33,428 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:40:33,428 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:40:33,428 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:40:33,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:40:33,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:40:33,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:40:33,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:40:33,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:40:33,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:40:33,429 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:40:33,430 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:40:33,430 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:40:33,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:40:33,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:40:33,430 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:40:33,431 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:40:33,431 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:40:33,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:40:33,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:40:33,431 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:40:33,432 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:40:33,432 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:40:33,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:40:33,432 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:40:33,432 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:40:33,433 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:40:33,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:40:33,744 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:40:33,748 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:40:33,749 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:40:33,750 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:40:33,750 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2n_append_unequal.i [2020-10-13 10:40:33,811 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d04a32fd/9f34be8f2165416785342f66926119c1/FLAGcd60a74c3 [2020-10-13 10:40:34,331 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:40:34,331 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-simple/sll2n_append_unequal.i [2020-10-13 10:40:34,357 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d04a32fd/9f34be8f2165416785342f66926119c1/FLAGcd60a74c3 [2020-10-13 10:40:34,683 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d04a32fd/9f34be8f2165416785342f66926119c1 [2020-10-13 10:40:34,692 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:40:34,694 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:40:34,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:40:34,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:40:34,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:40:34,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:40:34" (1/1) ... [2020-10-13 10:40:34,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f21bf92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:40:34, skipping insertion in model container [2020-10-13 10:40:34,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:40:34" (1/1) ... [2020-10-13 10:40:34,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:40:34,750 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:40:35,163 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:40:35,172 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:40:35,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:40:35,285 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:40:35,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:40:35 WrapperNode [2020-10-13 10:40:35,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:40:35,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:40:35,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:40:35,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:40:35,296 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:40:35" (1/1) ... [2020-10-13 10:40:35,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:40:35" (1/1) ... [2020-10-13 10:40:35,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:40:35" (1/1) ... [2020-10-13 10:40:35,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:40:35" (1/1) ... [2020-10-13 10:40:35,332 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:40:35" (1/1) ... [2020-10-13 10:40:35,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:40:35" (1/1) ... [2020-10-13 10:40:35,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:40:35" (1/1) ... [2020-10-13 10:40:35,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:40:35,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:40:35,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:40:35,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:40:35,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:40:35" (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 [2020-10-13 10:40:35,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:40:35,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:40:35,416 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-13 10:40:35,416 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-13 10:40:35,417 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-13 10:40:35,417 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2020-10-13 10:40:35,417 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-10-13 10:40:35,418 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-10-13 10:40:35,418 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_append [2020-10-13 10:40:35,418 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:40:35,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:40:35,419 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-13 10:40:35,419 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-13 10:40:35,419 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-13 10:40:35,419 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-13 10:40:35,420 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-13 10:40:35,420 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-13 10:40:35,420 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-13 10:40:35,421 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-13 10:40:35,421 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-13 10:40:35,421 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-13 10:40:35,422 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-13 10:40:35,422 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-13 10:40:35,422 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-13 10:40:35,422 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-13 10:40:35,423 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-13 10:40:35,423 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-13 10:40:35,423 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-13 10:40:35,424 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-13 10:40:35,424 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-13 10:40:35,424 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-13 10:40:35,424 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-13 10:40:35,424 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-13 10:40:35,424 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-13 10:40:35,424 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-13 10:40:35,425 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-13 10:40:35,425 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-13 10:40:35,425 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-13 10:40:35,425 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-13 10:40:35,425 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-13 10:40:35,425 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-13 10:40:35,425 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-13 10:40:35,426 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-13 10:40:35,426 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-13 10:40:35,426 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-13 10:40:35,426 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-13 10:40:35,426 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-13 10:40:35,426 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-13 10:40:35,426 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-13 10:40:35,427 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-13 10:40:35,427 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-13 10:40:35,427 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-13 10:40:35,427 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-13 10:40:35,428 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-13 10:40:35,428 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-13 10:40:35,428 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-13 10:40:35,428 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-13 10:40:35,428 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-13 10:40:35,428 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-13 10:40:35,428 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-13 10:40:35,429 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-13 10:40:35,429 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-13 10:40:35,429 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-13 10:40:35,429 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 10:40:35,429 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-13 10:40:35,429 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-13 10:40:35,429 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-13 10:40:35,430 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-13 10:40:35,430 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-13 10:40:35,431 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-13 10:40:35,431 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-13 10:40:35,433 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-13 10:40:35,433 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:40:35,433 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-13 10:40:35,433 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-13 10:40:35,433 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-13 10:40:35,433 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:40:35,434 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-13 10:40:35,434 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-13 10:40:35,434 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-13 10:40:35,434 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-13 10:40:35,434 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-13 10:40:35,435 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-13 10:40:35,435 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-13 10:40:35,435 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-13 10:40:35,435 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-13 10:40:35,436 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-13 10:40:35,436 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-13 10:40:35,436 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-13 10:40:35,436 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-13 10:40:35,436 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-13 10:40:35,436 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-13 10:40:35,436 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-13 10:40:35,437 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-13 10:40:35,437 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-13 10:40:35,437 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-13 10:40:35,437 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-13 10:40:35,437 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-13 10:40:35,437 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-13 10:40:35,437 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-13 10:40:35,437 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-13 10:40:35,438 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-13 10:40:35,438 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-13 10:40:35,438 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-13 10:40:35,438 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-13 10:40:35,438 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-13 10:40:35,438 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-13 10:40:35,438 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-13 10:40:35,439 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-13 10:40:35,439 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-13 10:40:35,439 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-13 10:40:35,439 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-13 10:40:35,439 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-13 10:40:35,439 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-13 10:40:35,439 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-13 10:40:35,440 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-13 10:40:35,440 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-13 10:40:35,441 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2020-10-13 10:40:35,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 10:40:35,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-13 10:40:35,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 10:40:35,442 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-10-13 10:40:35,442 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-10-13 10:40:35,442 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-13 10:40:35,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 10:40:35,443 INFO L130 BoogieDeclarations]: Found specification of procedure sll_append [2020-10-13 10:40:35,443 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:40:35,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 10:40:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-10-13 10:40:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 10:40:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:40:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:40:35,747 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-13 10:40:35,982 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:40:35,982 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-13 10:40:35,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:40:35 BoogieIcfgContainer [2020-10-13 10:40:35,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:40:35,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:40:35,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:40:35,991 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:40:35,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:40:34" (1/3) ... [2020-10-13 10:40:35,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f77ba41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:40:35, skipping insertion in model container [2020-10-13 10:40:35,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:40:35" (2/3) ... [2020-10-13 10:40:35,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f77ba41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:40:35, skipping insertion in model container [2020-10-13 10:40:35,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:40:35" (3/3) ... [2020-10-13 10:40:35,994 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2n_append_unequal.i [2020-10-13 10:40:36,002 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:40:36,008 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:40:36,018 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:40:36,037 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:40:36,038 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:40:36,038 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:40:36,038 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:40:36,038 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:40:36,039 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:40:36,039 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:40:36,039 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:40:36,057 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-10-13 10:40:36,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 10:40:36,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:40:36,066 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:40:36,066 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:40:36,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:40:36,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1433043619, now seen corresponding path program 1 times [2020-10-13 10:40:36,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:40:36,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60415755] [2020-10-13 10:40:36,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:40:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:36,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:36,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:36,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 10:40:36,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:36,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-10-13 10:40:36,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:36,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:36,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 10:40:36,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:36,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:40:36,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:40:36,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:36,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:36,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:36,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:40:36,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:36,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:40:36,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:36,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:36,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:36,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:36,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:36,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:40:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:36,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:36,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:36,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:40:36,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:36,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 10:40:36,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:36,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:36,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 10:40:36,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:36,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:36,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-13 10:40:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:36,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:36,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:36,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:40:36,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:36,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-13 10:40:36,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:36,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:36,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:40:36,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:36,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:36,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:40:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:36,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:36,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:36,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:40:36,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:36,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 10:40:36,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:36,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:36,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:36,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:36,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:40:36,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60415755] [2020-10-13 10:40:36,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:40:36,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:40:36,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109535334] [2020-10-13 10:40:36,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:40:36,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:40:36,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:40:36,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:40:36,760 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 4 states. [2020-10-13 10:40:36,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:40:36,952 INFO L93 Difference]: Finished difference Result 104 states and 136 transitions. [2020-10-13 10:40:36,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:40:36,954 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-13 10:40:36,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:40:36,965 INFO L225 Difference]: With dead ends: 104 [2020-10-13 10:40:36,966 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 10:40:36,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:40:36,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 10:40:37,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-10-13 10:40:37,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 10:40:37,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-13 10:40:37,026 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 29 [2020-10-13 10:40:37,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:40:37,026 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-13 10:40:37,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:40:37,027 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-13 10:40:37,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 10:40:37,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:40:37,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:40:37,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:40:37,037 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:40:37,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:40:37,038 INFO L82 PathProgramCache]: Analyzing trace with hash -257763685, now seen corresponding path program 1 times [2020-10-13 10:40:37,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:40:37,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938203401] [2020-10-13 10:40:37,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:40:37,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:37,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:37,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:37,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 10:40:37,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:37,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-13 10:40:37,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:37,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:40:37,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:40:37,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:40:37,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-13 10:40:37,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:40:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:37,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:37,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:37,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:40:37,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:37,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:40:37,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:37,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:37,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:37,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:37,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:40:37,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:40:37,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:37,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:37,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:37,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:40:37,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:37,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-13 10:40:37,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:37,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:40:37,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:40:37,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:40:37,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:37,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-13 10:40:37,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:37,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:37,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:37,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:40:37,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:37,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-13 10:40:37,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:37,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:37,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:40:37,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:37,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:40:37,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:40:37,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:37,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:37,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:37,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:40:37,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:37,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 10:40:37,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:37,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:37,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:37,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:37,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:40:37,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:40:37,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938203401] [2020-10-13 10:40:37,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:40:37,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 10:40:37,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353887245] [2020-10-13 10:40:37,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:40:37,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:40:37,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:40:37,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:40:37,482 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 7 states. [2020-10-13 10:40:37,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:40:37,732 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2020-10-13 10:40:37,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:40:37,732 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-13 10:40:37,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:40:37,734 INFO L225 Difference]: With dead ends: 74 [2020-10-13 10:40:37,734 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 10:40:37,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:40:37,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 10:40:37,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-10-13 10:40:37,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 10:40:37,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-10-13 10:40:37,745 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 29 [2020-10-13 10:40:37,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:40:37,745 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-10-13 10:40:37,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:40:37,745 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-10-13 10:40:37,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:40:37,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:40:37,747 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:40:37,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:40:37,747 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:40:37,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:40:37,748 INFO L82 PathProgramCache]: Analyzing trace with hash 58818396, now seen corresponding path program 1 times [2020-10-13 10:40:37,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:40:37,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931320957] [2020-10-13 10:40:37,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:40:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:37,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:37,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:38,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:41,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:41,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 10:40:41,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:40:41,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3404 [2020-10-13 10:40:41,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:41,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:40:41,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:40:41,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:40:41,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:40:41,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:40:41,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:41,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:41,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:41,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:40:41,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:41,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:40:41,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:41,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:41,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:41,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:41,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:40:41,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:40:41,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:41,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:41,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:41,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 10:40:41,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:41,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-13 10:40:41,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:41,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:40:41,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:40:41,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:40:41,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:41,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:40:41,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:41,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:41,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:41,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:40:41,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:41,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 10:40:41,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:41,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:40:41,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:41,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:40:41,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:40:41,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 10:40:41,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:41,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:41,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:41,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:40:41,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:41,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 10:40:41,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:41,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:41,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:40:41,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:41,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:40:41,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:40:41,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:41,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:41,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:41,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:40:41,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:41,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:40:41,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:41,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:41,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:41,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:41,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 10:40:41,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931320957] [2020-10-13 10:40:41,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:40:41,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:40:41,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390005706] [2020-10-13 10:40:41,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:40:41,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:40:41,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:40:41,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:40:41,462 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 8 states. [2020-10-13 10:40:41,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:40:41,680 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2020-10-13 10:40:41,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:40:41,682 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-10-13 10:40:41,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:40:41,684 INFO L225 Difference]: With dead ends: 78 [2020-10-13 10:40:41,684 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 10:40:41,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:40:41,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 10:40:41,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-10-13 10:40:41,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 10:40:41,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-10-13 10:40:41,699 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 38 [2020-10-13 10:40:41,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:40:41,700 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-10-13 10:40:41,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:40:41,700 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-10-13 10:40:41,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 10:40:41,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:40:41,703 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:40:41,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:40:41,704 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:40:41,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:40:41,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1476517957, now seen corresponding path program 2 times [2020-10-13 10:40:41,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:40:41,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26979491] [2020-10-13 10:40:41,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:40:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:41,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:42,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:42,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:42,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:45,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:45,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 10:40:45,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:40:45,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3425 [2020-10-13 10:40:45,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:45,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:40:45,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:40:45,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 10:40:45,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:40:45,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:40:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:45,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:45,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:45,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:40:45,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:45,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:40:45,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:45,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:45,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:45,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:45,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:45,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:40:45,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:45,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:45,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:45,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:40:45,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:45,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-13 10:40:45,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:45,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:40:45,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:45,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:40:45,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:45,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:40:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:45,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:45,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:45,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:40:45,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:45,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:40:45,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:45,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:45,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:45,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:45,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:45,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:40:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:45,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:45,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:45,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:40:45,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:45,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 10:40:45,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:45,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:40:45,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:45,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:40:45,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:40:45,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:40:45,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:45,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:45,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:45,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:40:45,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:45,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-13 10:40:45,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:45,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:40:45,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:40:45,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:40:45,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:45,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:40:45,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:45,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:45,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:45,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:40:45,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:45,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-13 10:40:45,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:45,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:40:45,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:40:45,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:40:45,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:40:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 10:40:45,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26979491] [2020-10-13 10:40:45,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:40:45,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:40:45,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203913739] [2020-10-13 10:40:45,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:40:45,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:40:45,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:40:45,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:40:45,801 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 18 states. [2020-10-13 10:40:46,524 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-10-13 10:40:46,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:40:46,661 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2020-10-13 10:40:46,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:40:46,662 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-10-13 10:40:46,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:40:46,663 INFO L225 Difference]: With dead ends: 58 [2020-10-13 10:40:46,664 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 10:40:46,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:40:46,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 10:40:46,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-13 10:40:46,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 10:40:46,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-10-13 10:40:46,680 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 47 [2020-10-13 10:40:46,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:40:46,681 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-10-13 10:40:46,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:40:46,681 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-10-13 10:40:46,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 10:40:46,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:40:46,685 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:40:46,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:40:46,685 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:40:46,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:40:46,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1884294349, now seen corresponding path program 1 times [2020-10-13 10:40:46,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:40:46,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625525990] [2020-10-13 10:40:46,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:40:46,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:46,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:46,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:47,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:47,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:48,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:48,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:50,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:51,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:51,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 10:40:51,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 10:40:51,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 10:40:51,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:51,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:40:51,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 10:40:51,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:40:51,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:40:51,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:40:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:51,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:51,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:51,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:40:51,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:51,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:40:51,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:51,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:51,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:51,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:51,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:40:51,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:40:51,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:51,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:51,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:51,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:40:51,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:51,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-13 10:40:51,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:51,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:51,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:51,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:51,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:40:51,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:40:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:51,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:51,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:51,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:40:51,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:51,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:40:51,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:51,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:51,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:51,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:51,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:40:51,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:40:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:51,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:51,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:51,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:40:51,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:51,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:40:51,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:51,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:51,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:51,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:51,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:40:51,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:40:51,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:51,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:52,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:52,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:52,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 10:40:52,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:40:52,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 238 [2020-10-13 10:40:52,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:52,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:40:52,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:52,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 10:40:52,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:40:52,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:40:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:52,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:52,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:52,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:52,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:40:52,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:40:52,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-13 10:40:52,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:52,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:40:52,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:52,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:40:52,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:52,938 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-13 10:40:52,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625525990] [2020-10-13 10:40:52,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:40:52,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-13 10:40:52,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122552115] [2020-10-13 10:40:52,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:40:52,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:40:52,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:40:52,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:40:52,940 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 15 states. [2020-10-13 10:40:53,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:40:53,560 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2020-10-13 10:40:53,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:40:53,561 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-10-13 10:40:53,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:40:53,562 INFO L225 Difference]: With dead ends: 64 [2020-10-13 10:40:53,563 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 10:40:53,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:40:53,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 10:40:53,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2020-10-13 10:40:53,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 10:40:53,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2020-10-13 10:40:53,577 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 50 [2020-10-13 10:40:53,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:40:53,578 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2020-10-13 10:40:53,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:40:53,578 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2020-10-13 10:40:53,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 10:40:53,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:40:53,583 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:40:53,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:40:53,583 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:40:53,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:40:53,584 INFO L82 PathProgramCache]: Analyzing trace with hash 753895118, now seen corresponding path program 1 times [2020-10-13 10:40:53,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:40:53,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963208926] [2020-10-13 10:40:53,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:40:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:53,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:54,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:54,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:56,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:57,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:58,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:58,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:58,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:58,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:58,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 10:40:58,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 10:40:58,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-10-13 10:40:58,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:58,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:40:58,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 10:40:58,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:40:58,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:40:58,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:40:58,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:58,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:58,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:58,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:40:58,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:58,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:40:58,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:58,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:58,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:58,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:58,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:58,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:40:58,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:58,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:58,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:58,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:40:58,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:58,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 10:40:58,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:58,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:58,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:58,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:58,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:58,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:40:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:58,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:58,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:58,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:40:58,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:58,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:40:58,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:58,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:58,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:58,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:58,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:58,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:40:58,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:58,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:58,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:58,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:40:58,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:58,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:40:58,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:58,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:58,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:58,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:58,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:58,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:40:58,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:58,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:58,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:58,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:40:58,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:58,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-13 10:40:58,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:58,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:40:58,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:58,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:40:58,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:59,353 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 54 [2020-10-13 10:40:59,627 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 82 [2020-10-13 10:40:59,846 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 75 [2020-10-13 10:40:59,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:40:59,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:59,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:59,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:59,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:40:59,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:59,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 10:40:59,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:59,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:40:59,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:59,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:40:59,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:59,928 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-13 10:40:59,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963208926] [2020-10-13 10:40:59,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:40:59,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:40:59,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262378011] [2020-10-13 10:40:59,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:40:59,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:40:59,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:40:59,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:40:59,931 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 14 states. [2020-10-13 10:41:00,599 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2020-10-13 10:41:00,888 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2020-10-13 10:41:01,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:41:01,043 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2020-10-13 10:41:01,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:41:01,044 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-10-13 10:41:01,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:41:01,045 INFO L225 Difference]: With dead ends: 71 [2020-10-13 10:41:01,045 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 10:41:01,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:41:01,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 10:41:01,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2020-10-13 10:41:01,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 10:41:01,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-10-13 10:41:01,063 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 52 [2020-10-13 10:41:01,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:41:01,063 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-10-13 10:41:01,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:41:01,064 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-10-13 10:41:01,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 10:41:01,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:41:01,065 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:41:01,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:41:01,065 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:41:01,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:41:01,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1644551471, now seen corresponding path program 1 times [2020-10-13 10:41:01,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:41:01,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392337709] [2020-10-13 10:41:01,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:41:01,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:01,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:01,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:01,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:04,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:04,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 10:41:04,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:41:04,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3829 [2020-10-13 10:41:04,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:04,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:41:04,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:41:04,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 10:41:04,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:04,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:41:04,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:04,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:04,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:04,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:41:04,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:04,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:41:04,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:04,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:04,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:04,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:04,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:05,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:41:05,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:05,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:05,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:05,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:41:05,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:05,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-13 10:41:05,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:05,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:41:05,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:05,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:41:05,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:05,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:41:05,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:05,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:05,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:05,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:05,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:05,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 10:41:05,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:05,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:41:05,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:05,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:41:05,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:05,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:41:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:05,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:05,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:05,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:05,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:05,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 10:41:05,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:05,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:41:05,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:05,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:41:05,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:05,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:41:05,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:05,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:05,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:05,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 10:41:05,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:05,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-13 10:41:05,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:05,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:41:05,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:41:05,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:41:05,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:05,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:41:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:05,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:05,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:05,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:05,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:05,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-13 10:41:05,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:05,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:41:05,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:41:05,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:41:05,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:41:05,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392337709] [2020-10-13 10:41:05,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:41:05,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:41:05,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578985659] [2020-10-13 10:41:05,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:41:05,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:41:05,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:41:05,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:41:05,920 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 23 states. [2020-10-13 10:41:06,971 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2020-10-13 10:41:07,160 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2020-10-13 10:41:07,386 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-10-13 10:41:07,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:41:07,501 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2020-10-13 10:41:07,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:41:07,502 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-13 10:41:07,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:41:07,506 INFO L225 Difference]: With dead ends: 69 [2020-10-13 10:41:07,506 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 10:41:07,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:41:07,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 10:41:07,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-13 10:41:07,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 10:41:07,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-10-13 10:41:07,524 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 52 [2020-10-13 10:41:07,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:41:07,524 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-10-13 10:41:07,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:41:07,525 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-10-13 10:41:07,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 10:41:07,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:41:07,526 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:41:07,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:41:07,526 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:41:07,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:41:07,526 INFO L82 PathProgramCache]: Analyzing trace with hash 2023268265, now seen corresponding path program 2 times [2020-10-13 10:41:07,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:41:07,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191371849] [2020-10-13 10:41:07,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:41:07,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:07,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:07,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:08,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:08,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:09,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:09,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:10,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:12,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:12,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:12,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 10:41:12,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 10:41:12,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 10:41:12,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:12,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:41:12,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 10:41:12,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 10:41:12,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:12,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:41:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:12,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:12,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:12,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:41:12,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:12,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:41:12,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:12,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:12,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:12,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:12,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:12,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:41:12,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:12,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:12,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:12,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:41:12,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:12,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 10:41:12,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:12,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:12,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:12,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:12,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:12,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:41:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:12,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:12,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:12,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:12,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:12,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:41:12,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:12,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:12,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:12,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:12,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:12,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:41:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:12,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:12,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:12,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:12,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:12,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:41:12,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:12,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:12,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:12,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:12,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:12,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:41:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:12,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:12,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:12,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:41:12,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:12,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-13 10:41:12,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:12,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:41:12,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:12,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:41:12,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:13,195 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2020-10-13 10:41:13,491 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-10-13 10:41:13,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:41:13,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:13,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:13,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:13,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:13,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:13,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:41:13,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:13,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:41:13,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:13,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:41:13,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:13,546 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 10:41:13,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191371849] [2020-10-13 10:41:13,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:41:13,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:41:13,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761374588] [2020-10-13 10:41:13,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:41:13,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:41:13,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:41:13,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:41:13,549 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 14 states. [2020-10-13 10:41:14,073 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 66 [2020-10-13 10:41:14,283 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2020-10-13 10:41:14,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:41:14,414 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2020-10-13 10:41:14,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:41:14,414 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-13 10:41:14,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:41:14,416 INFO L225 Difference]: With dead ends: 58 [2020-10-13 10:41:14,416 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 10:41:14,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:41:14,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 10:41:14,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2020-10-13 10:41:14,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 10:41:14,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-10-13 10:41:14,424 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 54 [2020-10-13 10:41:14,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:41:14,425 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-10-13 10:41:14,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:41:14,425 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-10-13 10:41:14,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 10:41:14,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:41:14,426 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:41:14,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:41:14,426 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:41:14,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:41:14,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1381042678, now seen corresponding path program 1 times [2020-10-13 10:41:14,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:41:14,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272311865] [2020-10-13 10:41:14,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:41:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:14,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:15,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:15,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 10:41:15,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:15,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 665 [2020-10-13 10:41:15,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:15,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 10:41:15,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:41:15,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 10:41:15,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:15,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:41:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:15,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:15,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:15,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:41:15,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:15,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:41:15,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:15,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:15,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:15,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:15,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:41:15,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:41:15,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:15,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:15,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:15,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:41:15,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:15,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-13 10:41:15,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:15,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:41:15,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:15,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:41:15,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:15,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:41:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:15,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:15,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:15,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:15,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:15,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 10:41:15,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:15,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:41:15,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:15,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:41:15,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:15,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:41:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:15,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:15,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:15,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:15,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:15,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 10:41:15,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:15,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:41:15,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:15,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:41:15,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 13 [2020-10-13 10:41:15,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:41:15,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:15,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:15,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:15,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:41:15,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:15,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-13 10:41:15,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:15,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:41:15,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:41:15,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:41:15,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:16,940 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 91 [2020-10-13 10:41:16,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:41:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:16,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:16,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:16,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:16,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:16,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-13 10:41:16,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:16,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:41:16,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:41:16,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:41:16,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:17,352 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 41 [2020-10-13 10:41:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:41:17,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272311865] [2020-10-13 10:41:17,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:41:17,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:41:17,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206645344] [2020-10-13 10:41:17,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:41:17,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:41:17,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:41:17,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:41:17,387 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 27 states. [2020-10-13 10:41:18,787 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2020-10-13 10:41:19,134 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 61 [2020-10-13 10:41:19,464 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2020-10-13 10:41:19,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:41:19,970 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2020-10-13 10:41:19,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:41:19,971 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 54 [2020-10-13 10:41:19,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:41:19,973 INFO L225 Difference]: With dead ends: 74 [2020-10-13 10:41:19,973 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 10:41:19,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=174, Invalid=1632, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 10:41:19,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 10:41:19,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-13 10:41:19,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 10:41:19,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-10-13 10:41:19,983 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 54 [2020-10-13 10:41:19,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:41:19,984 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-10-13 10:41:19,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:41:19,984 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-10-13 10:41:19,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 10:41:19,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:41:19,985 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:41:19,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:41:19,985 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:41:19,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:41:19,986 INFO L82 PathProgramCache]: Analyzing trace with hash 137295816, now seen corresponding path program 1 times [2020-10-13 10:41:19,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:41:19,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033063128] [2020-10-13 10:41:19,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:41:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:20,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:20,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:20,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:21,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:21,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:23,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:23,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:23,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:23,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:23,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:25,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:25,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 10:41:25,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 10:41:25,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 10:41:25,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:25,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:41:25,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-13 10:41:25,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:41:25,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:25,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:41:25,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:25,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:25,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:25,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:41:25,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:25,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:41:25,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:25,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:25,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:25,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:25,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:25,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:41:25,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:25,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:25,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:25,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:41:25,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:25,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:41:25,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:25,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:25,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:25,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:25,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:25,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:41:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:25,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:25,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:25,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:25,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:25,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:41:25,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:25,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:25,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:25,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:25,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:25,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:41:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:25,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:25,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:25,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:25,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:25,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:41:25,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:25,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:25,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:25,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:25,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:25,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:41:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:25,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:25,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:25,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:41:25,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:25,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:41:25,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:25,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:25,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:25,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:25,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:25,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:41:25,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:25,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:25,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:25,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:25,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:25,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:41:25,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:25,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:25,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:25,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:25,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:25,115 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-13 10:41:25,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033063128] [2020-10-13 10:41:25,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:41:25,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 10:41:25,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314226489] [2020-10-13 10:41:25,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:41:25,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:41:25,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:41:25,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:41:25,117 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 7 states. [2020-10-13 10:41:25,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:41:25,276 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2020-10-13 10:41:25,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:41:25,276 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-13 10:41:25,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:41:25,278 INFO L225 Difference]: With dead ends: 68 [2020-10-13 10:41:25,278 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 10:41:25,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:41:25,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 10:41:25,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2020-10-13 10:41:25,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 10:41:25,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-10-13 10:41:25,296 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 55 [2020-10-13 10:41:25,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:41:25,297 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-10-13 10:41:25,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:41:25,298 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-10-13 10:41:25,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 10:41:25,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:41:25,299 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:41:25,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:41:25,300 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:41:25,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:41:25,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1284160475, now seen corresponding path program 2 times [2020-10-13 10:41:25,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:41:25,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359357226] [2020-10-13 10:41:25,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:41:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:25,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:25,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:26,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:26,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 10:41:26,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:41:26,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 716 [2020-10-13 10:41:26,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:26,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 10:41:26,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:41:26,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 10:41:26,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:26,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:41:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:26,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:26,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:26,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:41:26,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:26,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:41:26,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:26,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:26,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:26,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:26,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:26,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:41:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:26,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:26,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:26,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:41:26,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:26,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-13 10:41:26,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:26,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:41:26,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:26,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:41:26,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:26,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:41:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:26,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:26,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:26,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:26,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:26,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 10:41:26,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:26,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:41:26,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:26,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:41:26,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:26,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:41:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:26,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:26,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:26,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:26,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:26,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-13 10:41:26,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:26,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:41:26,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:41:26,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:41:26,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:26,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:41:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:26,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:26,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:26,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:41:26,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:26,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-13 10:41:26,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:26,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:41:26,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:41:26,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 10:41:26,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:27,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:41:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:27,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:27,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:27,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:27,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:27,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 10:41:27,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:27,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:41:27,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:41:27,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:41:27,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:27,533 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:41:27,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359357226] [2020-10-13 10:41:27,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:41:27,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:41:27,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091610674] [2020-10-13 10:41:27,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:41:27,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:41:27,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:41:27,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:41:27,535 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 25 states. [2020-10-13 10:41:28,251 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-10-13 10:41:29,292 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2020-10-13 10:41:29,544 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 61 [2020-10-13 10:41:29,838 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 77 [2020-10-13 10:41:30,049 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2020-10-13 10:41:30,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:41:30,365 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2020-10-13 10:41:30,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:41:30,366 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2020-10-13 10:41:30,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:41:30,368 INFO L225 Difference]: With dead ends: 83 [2020-10-13 10:41:30,368 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 10:41:30,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=138, Invalid=1344, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:41:30,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 10:41:30,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2020-10-13 10:41:30,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 10:41:30,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2020-10-13 10:41:30,379 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 56 [2020-10-13 10:41:30,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:41:30,380 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2020-10-13 10:41:30,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:41:30,380 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2020-10-13 10:41:30,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 10:41:30,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:41:30,381 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:41:30,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:41:30,382 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:41:30,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:41:30,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1149670960, now seen corresponding path program 1 times [2020-10-13 10:41:30,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:41:30,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986447717] [2020-10-13 10:41:30,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:41:30,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:30,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:30,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:31,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:31,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:33,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:33,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:33,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:34,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:34,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:35,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:35,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 10:41:35,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 10:41:35,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 10:41:35,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:35,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 10:41:35,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:41:35,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 10:41:35,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:35,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:41:35,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:35,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:35,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:35,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:41:35,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:35,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:41:35,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:35,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:35,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:35,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:35,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:35,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:41:35,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:35,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:35,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:35,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:41:35,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:35,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-13 10:41:35,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:35,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:41:35,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:35,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:41:35,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:36,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:41:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:36,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:36,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:36,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:36,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:36,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 10:41:36,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:36,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:41:36,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:36,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:41:36,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:36,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:41:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:36,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:36,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:36,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:36,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:36,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 10:41:36,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:36,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:41:36,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:41:36,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:41:36,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:36,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:41:36,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:36,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:36,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:36,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:41:36,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:36,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-13 10:41:36,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:36,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:41:36,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:41:36,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:41:36,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:36,926 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-13 10:41:37,141 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2020-10-13 10:41:37,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:41:37,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:37,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:37,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:37,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:37,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:37,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-13 10:41:37,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:37,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:41:37,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:41:37,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:41:37,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:37,818 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2020-10-13 10:41:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:41:37,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986447717] [2020-10-13 10:41:37,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:41:37,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:41:37,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371635946] [2020-10-13 10:41:37,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:41:37,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:41:37,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:41:37,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=689, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:41:37,850 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand 28 states. [2020-10-13 10:41:38,686 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-10-13 10:41:39,851 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2020-10-13 10:41:40,397 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 61 [2020-10-13 10:41:40,742 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 74 [2020-10-13 10:41:41,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:41:41,381 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2020-10-13 10:41:41,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:41:41,381 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 57 [2020-10-13 10:41:41,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:41:41,383 INFO L225 Difference]: With dead ends: 87 [2020-10-13 10:41:41,383 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 10:41:41,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=183, Invalid=1887, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 10:41:41,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 10:41:41,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2020-10-13 10:41:41,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 10:41:41,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2020-10-13 10:41:41,394 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 57 [2020-10-13 10:41:41,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:41:41,395 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2020-10-13 10:41:41,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:41:41,395 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2020-10-13 10:41:41,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 10:41:41,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:41:41,396 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:41:41,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:41:41,396 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:41:41,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:41:41,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1280115518, now seen corresponding path program 1 times [2020-10-13 10:41:41,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:41:41,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243970978] [2020-10-13 10:41:41,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:41:41,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:41,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:41,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:42,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:43,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:43,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:44,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:46,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:46,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:41:46,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:41:46,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4593 [2020-10-13 10:41:46,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:46,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:41:46,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 10:41:46,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 10:41:46,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:41:46,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:41:46,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:46,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:46,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:46,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:41:46,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:46,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:41:46,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:46,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:46,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:46,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:46,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:41:46,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:41:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:46,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:46,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:46,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:41:46,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:46,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 10:41:46,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:46,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:46,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:46,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:46,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:41:46,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:41:46,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:46,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:46,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:46,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:46,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:46,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:41:46,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:46,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:46,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:46,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:46,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:41:46,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:41:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:46,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:46,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:46,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:46,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:46,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:41:46,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:46,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:46,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:46,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:46,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:41:46,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:41:46,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:46,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:46,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:46,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:46,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:41:46,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:41:46,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 263 [2020-10-13 10:41:46,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:46,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:41:46,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:46,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:41:46,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:46,907 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 38 [2020-10-13 10:41:47,109 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 38 [2020-10-13 10:41:47,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:41:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:47,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:47,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:47,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:47,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:47,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 10:41:47,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:47,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:41:47,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:47,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:41:47,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-13 10:41:47,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243970978] [2020-10-13 10:41:47,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:41:47,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:41:47,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452357669] [2020-10-13 10:41:47,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:41:47,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:41:47,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:41:47,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:41:47,374 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand 19 states. [2020-10-13 10:41:48,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:41:48,250 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2020-10-13 10:41:48,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:41:48,251 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 58 [2020-10-13 10:41:48,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:41:48,252 INFO L225 Difference]: With dead ends: 85 [2020-10-13 10:41:48,252 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 10:41:48,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:41:48,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 10:41:48,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2020-10-13 10:41:48,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 10:41:48,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2020-10-13 10:41:48,262 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 58 [2020-10-13 10:41:48,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:41:48,263 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2020-10-13 10:41:48,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:41:48,263 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2020-10-13 10:41:48,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 10:41:48,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:41:48,264 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:41:48,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:41:48,264 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:41:48,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:41:48,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1777330102, now seen corresponding path program 2 times [2020-10-13 10:41:48,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:41:48,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164650299] [2020-10-13 10:41:48,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:41:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:48,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:48,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:49,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:50,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:51,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:51,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:52,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:52,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:52,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:53,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:53,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 10:41:53,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 10:41:53,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 10:41:53,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:53,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:41:53,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 10:41:53,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 10:41:53,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:53,467 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-13 10:41:53,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:41:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:53,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:53,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:53,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:41:53,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:53,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:41:53,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:53,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:53,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:53,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:53,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:53,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:41:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:53,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:53,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:53,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:41:53,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:53,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:41:53,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:53,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:53,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:53,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:53,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:53,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:41:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:53,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:53,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:53,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:53,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:53,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:41:53,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:53,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:53,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:53,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:53,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:53,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:41:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:53,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:53,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:53,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:53,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:53,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:41:53,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:53,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:53,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:53,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:53,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:53,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:41:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:53,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:54,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:54,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:41:54,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:54,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-13 10:41:54,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:54,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:41:54,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:54,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:41:54,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:41:59,179 WARN L193 SmtUtils]: Spent 3.79 s on a formula simplification. DAG size of input: 571 DAG size of output: 57 [2020-10-13 10:42:00,106 WARN L193 SmtUtils]: Spent 819.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 55 [2020-10-13 10:42:00,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:42:00,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:00,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:00,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:00,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:42:00,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:00,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 10:42:00,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:00,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:42:00,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:00,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:42:00,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:00,193 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-13 10:42:00,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164650299] [2020-10-13 10:42:00,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:42:00,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:42:00,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961414540] [2020-10-13 10:42:00,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:42:00,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:00,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:42:00,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:42:00,195 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand 21 states. [2020-10-13 10:42:01,226 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-13 10:42:02,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:02,423 INFO L93 Difference]: Finished difference Result 90 states and 103 transitions. [2020-10-13 10:42:02,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:42:02,424 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 60 [2020-10-13 10:42:02,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:02,425 INFO L225 Difference]: With dead ends: 90 [2020-10-13 10:42:02,425 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 10:42:02,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:42:02,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 10:42:02,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 75. [2020-10-13 10:42:02,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 10:42:02,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2020-10-13 10:42:02,436 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 60 [2020-10-13 10:42:02,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:02,437 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2020-10-13 10:42:02,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:42:02,437 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2020-10-13 10:42:02,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 10:42:02,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:02,438 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:02,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:42:02,438 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:02,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:02,439 INFO L82 PathProgramCache]: Analyzing trace with hash -2143016252, now seen corresponding path program 3 times [2020-10-13 10:42:02,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:02,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792575234] [2020-10-13 10:42:02,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:02,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:02,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:04,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:04,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 10:42:04,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:04,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2020 [2020-10-13 10:42:04,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:04,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:42:04,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:42:04,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:42:04,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:04,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:04,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:04,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:04,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:04,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:04,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:42:04,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:04,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:04,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:04,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:04,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:04,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:42:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:04,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:04,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:04,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:42:04,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:04,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-13 10:42:04,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:04,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:42:04,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:42:04,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 10:42:04,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:04,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:42:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:04,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:04,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:04,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:42:04,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:04,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:42:04,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:04,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:04,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:04,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:42:04,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:04,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:42:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:04,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:04,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:04,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:42:04,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:04,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:42:04,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:04,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:04,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:04,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:42:04,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:04,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-13 10:42:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:04,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:04,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:04,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:42:04,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:04,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 10:42:04,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:04,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:04,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:04,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:42:04,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:04,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-13 10:42:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:04,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:04,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:04,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:42:04,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:04,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 10:42:04,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:04,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:04,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:42:04,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:04,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:04,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:42:04,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:04,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:04,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:04,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:42:04,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:04,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:42:04,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:04,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:04,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:04,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:04,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:04,760 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 10:42:04,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792575234] [2020-10-13 10:42:04,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:42:04,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:42:04,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076541644] [2020-10-13 10:42:04,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:42:04,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:04,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:42:04,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:42:04,764 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand 9 states. [2020-10-13 10:42:04,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:04,966 INFO L93 Difference]: Finished difference Result 115 states and 129 transitions. [2020-10-13 10:42:04,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:42:04,968 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-10-13 10:42:04,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:04,968 INFO L225 Difference]: With dead ends: 115 [2020-10-13 10:42:04,969 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 10:42:04,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:42:04,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 10:42:04,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-13 10:42:04,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 10:42:04,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2020-10-13 10:42:04,980 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 65 [2020-10-13 10:42:04,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:04,981 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2020-10-13 10:42:04,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:42:04,982 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2020-10-13 10:42:04,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 10:42:04,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:04,983 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:04,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:42:04,983 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:04,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:04,984 INFO L82 PathProgramCache]: Analyzing trace with hash 737287560, now seen corresponding path program 2 times [2020-10-13 10:42:04,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:04,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169787639] [2020-10-13 10:42:04,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:05,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:05,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:05,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:06,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:07,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:08,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:09,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:10,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:10,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 10:42:10,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:42:10,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 10:42:10,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:10,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 10:42:10,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 10:42:10,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 10:42:10,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:10,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:10,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:10,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:10,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:10,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:10,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:10,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:42:10,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:10,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:10,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:10,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:10,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:10,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:42:10,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:10,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:10,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:10,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:42:10,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:10,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-13 10:42:10,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:10,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:42:10,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:10,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:42:10,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:10,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:42:10,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:10,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:10,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:10,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:42:10,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:10,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 10:42:10,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:10,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:42:10,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:10,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:42:10,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:10,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:42:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:10,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:10,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:10,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:42:10,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:10,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:42:10,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:10,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:10,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:10,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:42:10,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:10,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:42:10,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:10,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:10,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:10,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:42:10,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:10,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-13 10:42:10,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:10,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:42:10,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:42:10,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:42:10,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:13,005 WARN L193 SmtUtils]: Spent 940.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 90 [2020-10-13 10:42:14,276 WARN L193 SmtUtils]: Spent 945.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 100 [2020-10-13 10:42:17,030 WARN L193 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 241 DAG size of output: 146 [2020-10-13 10:42:22,005 WARN L193 SmtUtils]: Spent 3.98 s on a formula simplification. DAG size of input: 288 DAG size of output: 194 [2020-10-13 10:42:26,218 WARN L193 SmtUtils]: Spent 3.54 s on a formula simplification. DAG size of input: 284 DAG size of output: 182 [2020-10-13 10:42:30,411 WARN L193 SmtUtils]: Spent 3.40 s on a formula simplification. DAG size of input: 278 DAG size of output: 176 [2020-10-13 10:42:36,158 WARN L193 SmtUtils]: Spent 3.51 s on a formula simplification. DAG size of input: 276 DAG size of output: 168 [2020-10-13 10:42:38,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:42:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:38,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:38,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:38,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:42:38,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:38,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-13 10:42:38,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:38,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:42:38,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:42:38,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:42:38,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:22,167 WARN L193 SmtUtils]: Spent 32.95 s on a formula simplification. DAG size of input: 1240 DAG size of output: 155 [2020-10-13 10:43:33,125 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:43:33,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169787639] [2020-10-13 10:43:33,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:33,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 10:43:33,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057550948] [2020-10-13 10:43:33,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 10:43:33,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:33,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 10:43:33,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=753, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:43:33,127 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 29 states. [2020-10-13 10:43:36,234 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification that was a NOOP. DAG size: 155 [2020-10-13 10:43:42,886 WARN L193 SmtUtils]: Spent 3.30 s on a formula simplification. DAG size of input: 207 DAG size of output: 206 [2020-10-13 10:43:45,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:45,738 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2020-10-13 10:43:45,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:43:45,740 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 61 [2020-10-13 10:43:45,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:45,741 INFO L225 Difference]: With dead ends: 64 [2020-10-13 10:43:45,741 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 10:43:45,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 87.2s TimeCoverageRelationStatistics Valid=131, Invalid=1675, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 10:43:45,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 10:43:45,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-10-13 10:43:45,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 10:43:45,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-10-13 10:43:45,750 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 61 [2020-10-13 10:43:45,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:45,751 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-10-13 10:43:45,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 10:43:45,751 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-10-13 10:43:45,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 10:43:45,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:45,752 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:45,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:43:45,752 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:45,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:45,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1381079740, now seen corresponding path program 1 times [2020-10-13 10:43:45,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:45,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256891353] [2020-10-13 10:43:45,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:45,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:45,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:45,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:46,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:46,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 10:43:46,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:46,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 372 [2020-10-13 10:43:46,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:46,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:43:46,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:43:46,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 10:43:46,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:46,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:46,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:46,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:46,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:46,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:46,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:46,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:46,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:46,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:46,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:46,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:46,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:46,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:43:46,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:46,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:46,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:46,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:43:46,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:46,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-13 10:43:46,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:46,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:43:46,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:46,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:43:46,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:46,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:43:46,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:46,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:46,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:46,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:43:46,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:46,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:43:46,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:46,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:43:46,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:46,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:43:46,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:46,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:43:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:46,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:46,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:46,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:43:46,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:46,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:43:46,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:46,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:43:46,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:46,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:43:46,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:46,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:43:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:46,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:46,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:46,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:43:46,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:46,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 10:43:46,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:46,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:43:46,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:46,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:43:46,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:46,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:43:46,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:46,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:46,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:46,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:43:46,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:46,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:43:46,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:46,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:46,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:46,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:46,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:46,605 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-13 10:43:46,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256891353] [2020-10-13 10:43:46,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:46,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:43:46,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083905382] [2020-10-13 10:43:46,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:43:46,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:46,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:43:46,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:43:46,607 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 14 states. [2020-10-13 10:43:47,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:47,394 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2020-10-13 10:43:47,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:43:47,395 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-13 10:43:47,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:47,396 INFO L225 Difference]: With dead ends: 69 [2020-10-13 10:43:47,396 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 10:43:47,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:43:47,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 10:43:47,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2020-10-13 10:43:47,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 10:43:47,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-10-13 10:43:47,405 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 62 [2020-10-13 10:43:47,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:47,406 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-10-13 10:43:47,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:43:47,406 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-10-13 10:43:47,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 10:43:47,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:47,407 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:47,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:43:47,407 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:47,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:47,407 INFO L82 PathProgramCache]: Analyzing trace with hash -83222640, now seen corresponding path program 3 times [2020-10-13 10:43:47,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:47,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508410186] [2020-10-13 10:43:47,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:47,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:47,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:47,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:48,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:49,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:49,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:50,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:50,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:50,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:51,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:52,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:52,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 10:43:52,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 10:43:52,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 10:43:52,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:52,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:43:52,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 10:43:52,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 10:43:52,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:52,735 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2020-10-13 10:43:52,857 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2020-10-13 10:43:53,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:53,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:53,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:53,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:53,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:53,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:53,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:53,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:53,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:53,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:53,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:53,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:53,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:43:53,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:53,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:53,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:53,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:43:53,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:53,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:43:53,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:53,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:53,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:53,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:53,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:53,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:43:53,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:53,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:53,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:53,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:43:53,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:53,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:43:53,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:53,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:53,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:53,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:53,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:53,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:43:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:53,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:53,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:53,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:43:53,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:53,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:43:53,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:53,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:53,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:53,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:53,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:53,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:43:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:53,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:53,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:53,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:43:53,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:53,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-13 10:43:53,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:53,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:43:53,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:53,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:43:53,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:56,336 WARN L193 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 370 DAG size of output: 52 [2020-10-13 10:43:58,698 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 370 DAG size of output: 52 [2020-10-13 10:44:00,883 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 325 DAG size of output: 42 [2020-10-13 10:44:01,169 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 32 [2020-10-13 10:44:01,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:44:01,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:01,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:01,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:01,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:44:01,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:01,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 10:44:01,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:01,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:44:01,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:01,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:44:01,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-13 10:44:01,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508410186] [2020-10-13 10:44:01,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:01,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:44:01,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531659660] [2020-10-13 10:44:01,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:44:01,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:01,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:44:01,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:44:01,270 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 23 states. [2020-10-13 10:44:02,337 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-13 10:44:02,718 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-13 10:44:04,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:04,052 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2020-10-13 10:44:04,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:44:04,054 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 63 [2020-10-13 10:44:04,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:04,055 INFO L225 Difference]: With dead ends: 67 [2020-10-13 10:44:04,055 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 10:44:04,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=135, Invalid=1347, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:44:04,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 10:44:04,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2020-10-13 10:44:04,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 10:44:04,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-10-13 10:44:04,066 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 63 [2020-10-13 10:44:04,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:04,067 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-10-13 10:44:04,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:44:04,067 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-10-13 10:44:04,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 10:44:04,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:04,068 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:04,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:44:04,068 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:04,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:04,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1715011330, now seen corresponding path program 3 times [2020-10-13 10:44:04,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:04,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570865077] [2020-10-13 10:44:04,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:04,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:04,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:05,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:06,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:06,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:06,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:07,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:07,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:08,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:08,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:08,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:09,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:09,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 10:44:09,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 10:44:09,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 10:44:09,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:09,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:44:09,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 10:44:09,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:44:09,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:09,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:09,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:09,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:09,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:44:09,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:09,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:09,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:09,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:09,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:09,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:09,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:09,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:44:09,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:09,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:09,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:09,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:44:09,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:09,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:44:09,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:09,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:09,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:09,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:09,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:09,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:44:09,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:09,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:09,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:09,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:44:09,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:09,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:44:09,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:09,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:09,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:09,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:09,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:09,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:44:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:09,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:09,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:09,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:44:09,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:09,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:09,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:09,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:09,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:09,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:09,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:09,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:44:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:09,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:10,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:10,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:44:10,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:10,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-13 10:44:10,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:10,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:44:10,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:10,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:44:10,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:11,774 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 252 DAG size of output: 53 [2020-10-13 10:44:13,246 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 252 DAG size of output: 48 [2020-10-13 10:44:14,633 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 241 DAG size of output: 41 [2020-10-13 10:44:14,810 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-10-13 10:44:14,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:44:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:14,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:14,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:14,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:44:14,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:14,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 10:44:14,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:14,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:44:14,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:14,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:44:14,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:14,913 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-13 10:44:14,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570865077] [2020-10-13 10:44:14,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:14,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:44:14,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720824268] [2020-10-13 10:44:14,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:44:14,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:14,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:44:14,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:44:14,915 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 23 states. [2020-10-13 10:44:15,783 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-10-13 10:44:16,063 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-13 10:44:16,539 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-13 10:44:17,785 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2020-10-13 10:44:18,054 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-10-13 10:44:18,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:18,458 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2020-10-13 10:44:18,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:44:18,460 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 64 [2020-10-13 10:44:18,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:18,461 INFO L225 Difference]: With dead ends: 65 [2020-10-13 10:44:18,461 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 10:44:18,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=145, Invalid=1415, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:44:18,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 10:44:18,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-13 10:44:18,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 10:44:18,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-10-13 10:44:18,470 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 64 [2020-10-13 10:44:18,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:18,471 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-10-13 10:44:18,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:44:18,471 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-10-13 10:44:18,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 10:44:18,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:18,472 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:18,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:44:18,472 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:18,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:18,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1088517494, now seen corresponding path program 4 times [2020-10-13 10:44:18,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:18,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169888165] [2020-10-13 10:44:18,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:18,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:18,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:18,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:19,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:19,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:20,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:20,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:20,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:22,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:23,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:23,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 10:44:23,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 10:44:23,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 10:44:23,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:23,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:44:23,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:44:23,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 10:44:23,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:23,536 ERROR L253 erpolLogProxyWrapper]: Interpolant 13 not inductive [2020-10-13 10:44:23,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:44:23,541 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:849) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:155) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:256) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:150) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-10-13 10:44:23,548 INFO L168 Benchmark]: Toolchain (without parser) took 228854.69 ms. Allocated memory was 147.3 MB in the beginning and 1.6 GB in the end (delta: 1.5 GB). Free memory was 102.2 MB in the beginning and 1.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2020-10-13 10:44:23,549 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 147.3 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-13 10:44:23,549 INFO L168 Benchmark]: CACSL2BoogieTranslator took 590.23 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 102.0 MB in the beginning and 169.1 MB in the end (delta: -67.1 MB). Peak memory consumption was 20.9 MB. Max. memory is 7.1 GB. [2020-10-13 10:44:23,550 INFO L168 Benchmark]: Boogie Preprocessor took 61.92 ms. Allocated memory is still 204.5 MB. Free memory was 169.1 MB in the beginning and 165.8 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. [2020-10-13 10:44:23,550 INFO L168 Benchmark]: RCFGBuilder took 638.09 ms. Allocated memory is still 204.5 MB. Free memory was 165.8 MB in the beginning and 115.3 MB in the end (delta: 50.5 MB). Peak memory consumption was 50.5 MB. Max. memory is 7.1 GB. [2020-10-13 10:44:23,551 INFO L168 Benchmark]: TraceAbstraction took 227559.18 ms. Allocated memory was 204.5 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 115.3 MB in the beginning and 1.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2020-10-13 10:44:23,553 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 147.3 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 590.23 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 102.0 MB in the beginning and 169.1 MB in the end (delta: -67.1 MB). Peak memory consumption was 20.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 61.92 ms. Allocated memory is still 204.5 MB. Free memory was 169.1 MB in the beginning and 165.8 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 638.09 ms. Allocated memory is still 204.5 MB. Free memory was 165.8 MB in the beginning and 115.3 MB in the end (delta: 50.5 MB). Peak memory consumption was 50.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 227559.18 ms. Allocated memory was 204.5 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 115.3 MB in the beginning and 1.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...