/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-ext2-properties/list_and_tree_cnstr-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:31:13,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:31:13,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:31:13,401 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:31:13,402 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:31:13,403 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:31:13,407 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:31:13,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:31:13,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:31:13,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:31:13,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:31:13,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:31:13,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:31:13,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:31:13,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:31:13,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:31:13,421 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:31:13,422 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:31:13,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:31:13,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:31:13,426 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:31:13,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:31:13,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:31:13,429 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:31:13,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:31:13,431 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:31:13,432 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:31:13,432 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:31:13,433 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:31:13,434 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:31:13,434 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:31:13,434 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:31:13,435 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:31:13,436 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:31:13,437 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:31:13,437 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:31:13,437 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:31:13,438 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:31:13,438 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:31:13,439 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:31:13,439 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:31:13,440 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 10:31:13,466 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:31:13,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:31:13,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:31:13,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:31:13,468 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:31:13,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:31:13,469 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:31:13,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:31:13,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:31:13,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:31:13,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:31:13,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:31:13,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:31:13,470 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:31:13,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:31:13,470 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:31:13,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:31:13,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:31:13,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:31:13,471 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:31:13,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:31:13,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:31:13,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:31:13,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:31:13,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:31:13,472 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:31:13,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:31:13,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:31:13,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:31:13,473 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 10:31:13,762 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:31:13,774 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:31:13,777 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:31:13,779 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:31:13,779 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:31:13,780 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-2.i [2020-10-13 10:31:13,836 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b562465a6/b9bcae9ed5914b409dfec0f62def8e86/FLAG30adb57b3 [2020-10-13 10:31:14,364 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:31:14,365 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-2.i [2020-10-13 10:31:14,377 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b562465a6/b9bcae9ed5914b409dfec0f62def8e86/FLAG30adb57b3 [2020-10-13 10:31:14,602 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b562465a6/b9bcae9ed5914b409dfec0f62def8e86 [2020-10-13 10:31:14,611 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:31:14,613 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:31:14,614 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:31:14,614 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:31:14,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:31:14,619 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:31:14" (1/1) ... [2020-10-13 10:31:14,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@508fde21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:14, skipping insertion in model container [2020-10-13 10:31:14,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:31:14" (1/1) ... [2020-10-13 10:31:14,629 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:31:14,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:31:15,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:31:15,159 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:31:15,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:31:15,273 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:31:15,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:15 WrapperNode [2020-10-13 10:31:15,274 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:31:15,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:31:15,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:31:15,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:31:15,287 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:15" (1/1) ... [2020-10-13 10:31:15,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:15" (1/1) ... [2020-10-13 10:31:15,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:15" (1/1) ... [2020-10-13 10:31:15,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:15" (1/1) ... [2020-10-13 10:31:15,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:15" (1/1) ... [2020-10-13 10:31:15,342 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:15" (1/1) ... [2020-10-13 10:31:15,348 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:15" (1/1) ... [2020-10-13 10:31:15,356 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:31:15,356 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:31:15,356 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:31:15,357 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:31:15,357 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:15" (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 10:31:15,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:31:15,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:31:15,416 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-13 10:31:15,416 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-13 10:31:15,416 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-13 10:31:15,416 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:31:15,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:31:15,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:31:15,417 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-13 10:31:15,417 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-13 10:31:15,417 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-13 10:31:15,417 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-13 10:31:15,417 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-13 10:31:15,418 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-13 10:31:15,418 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-13 10:31:15,418 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-13 10:31:15,418 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-13 10:31:15,418 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-13 10:31:15,418 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-13 10:31:15,419 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-13 10:31:15,419 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-13 10:31:15,419 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-13 10:31:15,419 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-13 10:31:15,419 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-13 10:31:15,419 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-13 10:31:15,420 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-13 10:31:15,420 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-13 10:31:15,420 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-13 10:31:15,420 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-13 10:31:15,420 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-13 10:31:15,420 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-13 10:31:15,421 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-13 10:31:15,421 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-13 10:31:15,421 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-13 10:31:15,421 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-13 10:31:15,421 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-13 10:31:15,421 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-13 10:31:15,422 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-13 10:31:15,422 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-13 10:31:15,422 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-13 10:31:15,422 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-13 10:31:15,422 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-13 10:31:15,422 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-13 10:31:15,422 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-13 10:31:15,423 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-13 10:31:15,423 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-13 10:31:15,423 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-13 10:31:15,423 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-13 10:31:15,423 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-13 10:31:15,423 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-13 10:31:15,424 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-13 10:31:15,424 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-13 10:31:15,424 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-13 10:31:15,424 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-13 10:31:15,424 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-13 10:31:15,424 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-13 10:31:15,424 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-13 10:31:15,425 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-13 10:31:15,425 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-13 10:31:15,425 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-13 10:31:15,425 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 10:31:15,425 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-13 10:31:15,425 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-13 10:31:15,426 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-13 10:31:15,426 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-13 10:31:15,426 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-13 10:31:15,426 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-13 10:31:15,426 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-13 10:31:15,426 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-13 10:31:15,426 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:31:15,427 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-13 10:31:15,427 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-13 10:31:15,427 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-13 10:31:15,427 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:31:15,427 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-13 10:31:15,427 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-13 10:31:15,428 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-13 10:31:15,428 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-13 10:31:15,428 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-13 10:31:15,428 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-13 10:31:15,428 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-13 10:31:15,428 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-13 10:31:15,428 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-13 10:31:15,429 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-13 10:31:15,429 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-13 10:31:15,429 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-13 10:31:15,429 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-13 10:31:15,429 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-13 10:31:15,429 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-13 10:31:15,430 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-13 10:31:15,430 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-13 10:31:15,430 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-13 10:31:15,430 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-13 10:31:15,430 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-13 10:31:15,430 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-13 10:31:15,430 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-13 10:31:15,431 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-13 10:31:15,431 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-13 10:31:15,431 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-13 10:31:15,431 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-13 10:31:15,431 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-13 10:31:15,431 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-13 10:31:15,431 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-13 10:31:15,432 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-13 10:31:15,432 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-13 10:31:15,432 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-13 10:31:15,432 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-13 10:31:15,432 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-13 10:31:15,432 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-13 10:31:15,432 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-13 10:31:15,433 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-13 10:31:15,433 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-13 10:31:15,433 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-13 10:31:15,433 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-13 10:31:15,433 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:31:15,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 10:31:15,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-13 10:31:15,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-13 10:31:15,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 10:31:15,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 10:31:15,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 10:31:15,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:31:15,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:31:15,760 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-13 10:31:16,026 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:31:16,026 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-13 10:31:16,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:31:16 BoogieIcfgContainer [2020-10-13 10:31:16,030 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:31:16,031 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:31:16,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:31:16,035 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:31:16,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:31:14" (1/3) ... [2020-10-13 10:31:16,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e19eef1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:31:16, skipping insertion in model container [2020-10-13 10:31:16,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:15" (2/3) ... [2020-10-13 10:31:16,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e19eef1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:31:16, skipping insertion in model container [2020-10-13 10:31:16,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:31:16" (3/3) ... [2020-10-13 10:31:16,038 INFO L109 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-2.i [2020-10-13 10:31:16,048 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:31:16,056 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:31:16,070 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:31:16,093 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:31:16,093 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:31:16,093 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:31:16,093 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:31:16,094 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:31:16,094 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:31:16,094 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:31:16,095 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:31:16,114 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-10-13 10:31:16,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:31:16,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:16,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:16,123 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:16,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:16,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1575706012, now seen corresponding path program 1 times [2020-10-13 10:31:16,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:16,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898981763] [2020-10-13 10:31:16,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:16,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:16,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:16,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:16,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:16,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:16,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:16,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:16,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:16,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:16,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:31:16,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 10:31:16,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 397 [2020-10-13 10:31:16,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:16,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:16,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:31:16,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:16,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:31:16,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:16,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:16,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:16,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:16,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:16,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:16,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:31:16,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:16,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:16,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:16,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:16,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:16,717 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 10:31:16,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898981763] [2020-10-13 10:31:16,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:31:16,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:31:16,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524506980] [2020-10-13 10:31:16,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:31:16,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:16,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:31:16,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:31:16,743 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 3 states. [2020-10-13 10:31:16,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:16,911 INFO L93 Difference]: Finished difference Result 108 states and 166 transitions. [2020-10-13 10:31:16,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:31:16,912 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-10-13 10:31:16,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:16,921 INFO L225 Difference]: With dead ends: 108 [2020-10-13 10:31:16,921 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 10:31:16,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:31:16,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 10:31:16,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-13 10:31:16,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 10:31:16,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2020-10-13 10:31:16,965 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 20 [2020-10-13 10:31:16,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:16,966 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2020-10-13 10:31:16,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:31:16,966 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2020-10-13 10:31:16,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 10:31:16,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:16,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:16,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:31:16,968 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:16,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:16,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1627887593, now seen corresponding path program 1 times [2020-10-13 10:31:16,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:16,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713968162] [2020-10-13 10:31:16,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:16,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:17,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:17,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:17,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 10:31:17,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:31:17,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-13 10:31:17,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:17,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:31:17,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:31:17,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:31:17,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:17,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:17,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:17,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:17,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:17,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:17,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:31:17,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:17,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:17,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:17,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:17,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:31:17,218 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 10:31:17,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713968162] [2020-10-13 10:31:17,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:31:17,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:31:17,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281151870] [2020-10-13 10:31:17,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:31:17,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:17,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:31:17,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:31:17,227 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand 4 states. [2020-10-13 10:31:17,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:17,398 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2020-10-13 10:31:17,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:31:17,399 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-13 10:31:17,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:17,402 INFO L225 Difference]: With dead ends: 75 [2020-10-13 10:31:17,402 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 10:31:17,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:31:17,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 10:31:17,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-13 10:31:17,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 10:31:17,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 77 transitions. [2020-10-13 10:31:17,428 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 77 transitions. Word has length 25 [2020-10-13 10:31:17,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:17,428 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 77 transitions. [2020-10-13 10:31:17,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:31:17,429 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 77 transitions. [2020-10-13 10:31:17,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 10:31:17,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:17,433 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:17,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:31:17,434 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:17,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:17,435 INFO L82 PathProgramCache]: Analyzing trace with hash -164754602, now seen corresponding path program 1 times [2020-10-13 10:31:17,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:17,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112428686] [2020-10-13 10:31:17,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:17,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:17,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:17,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:17,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:17,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 10:31:17,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:31:17,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-13 10:31:17,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:17,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:31:17,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 10:31:17,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:31:17,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:17,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:17,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:17,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:17,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:17,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:17,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:31:17,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:17,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:17,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:17,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:17,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:17,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:31:17,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112428686] [2020-10-13 10:31:17,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:31:17,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:31:17,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107790193] [2020-10-13 10:31:17,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:31:17,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:17,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:31:17,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:31:17,797 INFO L87 Difference]: Start difference. First operand 55 states and 77 transitions. Second operand 4 states. [2020-10-13 10:31:17,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:17,912 INFO L93 Difference]: Finished difference Result 93 states and 131 transitions. [2020-10-13 10:31:17,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:31:17,913 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-13 10:31:17,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:17,914 INFO L225 Difference]: With dead ends: 93 [2020-10-13 10:31:17,914 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 10:31:17,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:31:17,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 10:31:17,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-13 10:31:17,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 10:31:17,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2020-10-13 10:31:17,922 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 31 [2020-10-13 10:31:17,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:17,923 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2020-10-13 10:31:17,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:31:17,923 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2020-10-13 10:31:17,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 10:31:17,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:17,924 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:17,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:31:17,925 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:17,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:17,925 INFO L82 PathProgramCache]: Analyzing trace with hash -982403052, now seen corresponding path program 1 times [2020-10-13 10:31:17,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:17,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000760702] [2020-10-13 10:31:17,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:17,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:17,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:17,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:17,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 10:31:17,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:17,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-13 10:31:17,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:17,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:31:17,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 10:31:17,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:31:17,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:18,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:18,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:18,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:18,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:18,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:18,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:18,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:18,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:18,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:18,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:18,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:18,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:31:18,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000760702] [2020-10-13 10:31:18,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:31:18,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:31:18,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405115889] [2020-10-13 10:31:18,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:31:18,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:18,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:31:18,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:31:18,070 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand 6 states. [2020-10-13 10:31:18,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:18,256 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2020-10-13 10:31:18,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:31:18,257 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-13 10:31:18,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:18,258 INFO L225 Difference]: With dead ends: 82 [2020-10-13 10:31:18,258 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 10:31:18,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:31:18,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 10:31:18,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2020-10-13 10:31:18,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 10:31:18,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 91 transitions. [2020-10-13 10:31:18,267 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 91 transitions. Word has length 31 [2020-10-13 10:31:18,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:18,267 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 91 transitions. [2020-10-13 10:31:18,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:31:18,267 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 91 transitions. [2020-10-13 10:31:18,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 10:31:18,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:18,269 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:18,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:31:18,269 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:18,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:18,270 INFO L82 PathProgramCache]: Analyzing trace with hash 852152367, now seen corresponding path program 1 times [2020-10-13 10:31:18,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:18,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240687763] [2020-10-13 10:31:18,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:18,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:18,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:18,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 10:31:18,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:18,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-13 10:31:18,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:18,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:31:18,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 10:31:18,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:31:18,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:18,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:18,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:18,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:18,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:18,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:18,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:18,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:31:18,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:18,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:18,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:18,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:18,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:18,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:31:18,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240687763] [2020-10-13 10:31:18,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:31:18,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:31:18,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603884536] [2020-10-13 10:31:18,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:31:18,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:18,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:31:18,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:31:18,479 INFO L87 Difference]: Start difference. First operand 66 states and 91 transitions. Second operand 6 states. [2020-10-13 10:31:18,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:18,662 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2020-10-13 10:31:18,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:31:18,663 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-10-13 10:31:18,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:18,664 INFO L225 Difference]: With dead ends: 84 [2020-10-13 10:31:18,664 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 10:31:18,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:31:18,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 10:31:18,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2020-10-13 10:31:18,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 10:31:18,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 88 transitions. [2020-10-13 10:31:18,672 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 88 transitions. Word has length 33 [2020-10-13 10:31:18,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:18,673 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 88 transitions. [2020-10-13 10:31:18,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:31:18,673 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 88 transitions. [2020-10-13 10:31:18,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 10:31:18,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:18,674 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:18,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:31:18,675 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:18,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:18,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1876855343, now seen corresponding path program 1 times [2020-10-13 10:31:18,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:18,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198447928] [2020-10-13 10:31:18,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:18,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:18,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:18,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:18,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 10:31:18,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:18,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-13 10:31:18,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:18,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:31:18,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 10:31:18,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:31:18,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:18,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:18,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:18,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:18,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:18,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:18,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:18,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:18,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:18,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:18,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:18,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:18,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:31:18,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198447928] [2020-10-13 10:31:18,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:31:18,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:31:18,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342957522] [2020-10-13 10:31:18,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:31:18,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:18,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:31:18,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:31:18,795 INFO L87 Difference]: Start difference. First operand 64 states and 88 transitions. Second operand 6 states. [2020-10-13 10:31:18,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:18,962 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2020-10-13 10:31:18,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:31:18,963 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-10-13 10:31:18,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:18,964 INFO L225 Difference]: With dead ends: 84 [2020-10-13 10:31:18,964 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 10:31:18,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:31:18,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 10:31:18,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 61. [2020-10-13 10:31:18,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 10:31:18,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 84 transitions. [2020-10-13 10:31:18,976 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 84 transitions. Word has length 33 [2020-10-13 10:31:18,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:18,977 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 84 transitions. [2020-10-13 10:31:18,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:31:18,979 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 84 transitions. [2020-10-13 10:31:18,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 10:31:18,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:18,980 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:18,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:31:18,980 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:18,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:18,981 INFO L82 PathProgramCache]: Analyzing trace with hash -778946181, now seen corresponding path program 1 times [2020-10-13 10:31:18,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:18,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065078953] [2020-10-13 10:31:18,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:19,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:19,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:19,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:19,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 10:31:19,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:31:19,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 411 [2020-10-13 10:31:19,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:19,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:31:19,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 10:31:19,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:31:19,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:31:19,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:19,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:19,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:19,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:19,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:19,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:19,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:19,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:19,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:19,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:19,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:19,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:31:19,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065078953] [2020-10-13 10:31:19,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:19,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:31:19,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232236170] [2020-10-13 10:31:19,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:31:19,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:19,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:31:19,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:31:19,572 INFO L87 Difference]: Start difference. First operand 61 states and 84 transitions. Second operand 10 states. [2020-10-13 10:31:19,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:19,863 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2020-10-13 10:31:19,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:31:19,864 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-13 10:31:19,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:19,865 INFO L225 Difference]: With dead ends: 86 [2020-10-13 10:31:19,865 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 10:31:19,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:31:19,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 10:31:19,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2020-10-13 10:31:19,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 10:31:19,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 95 transitions. [2020-10-13 10:31:19,871 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 95 transitions. Word has length 35 [2020-10-13 10:31:19,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:19,872 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 95 transitions. [2020-10-13 10:31:19,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:31:19,872 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 95 transitions. [2020-10-13 10:31:19,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 10:31:19,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:19,873 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:19,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:31:19,874 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:19,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:19,874 INFO L82 PathProgramCache]: Analyzing trace with hash 84455483, now seen corresponding path program 1 times [2020-10-13 10:31:19,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:19,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753003679] [2020-10-13 10:31:19,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:19,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:19,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:20,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:20,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 10:31:20,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:31:20,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-10-13 10:31:20,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:20,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:31:20,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:31:20,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:31:20,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:31:20,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:20,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:20,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:20,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:20,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:20,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:20,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:31:20,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:20,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:20,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:20,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:20,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:20,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:31:20,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753003679] [2020-10-13 10:31:20,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:20,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:31:20,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984704359] [2020-10-13 10:31:20,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:31:20,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:20,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:31:20,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:31:20,261 INFO L87 Difference]: Start difference. First operand 70 states and 95 transitions. Second operand 9 states. [2020-10-13 10:31:20,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:20,610 INFO L93 Difference]: Finished difference Result 97 states and 126 transitions. [2020-10-13 10:31:20,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:31:20,610 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-13 10:31:20,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:20,612 INFO L225 Difference]: With dead ends: 97 [2020-10-13 10:31:20,612 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 10:31:20,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:31:20,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 10:31:20,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2020-10-13 10:31:20,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 10:31:20,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 106 transitions. [2020-10-13 10:31:20,618 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 106 transitions. Word has length 35 [2020-10-13 10:31:20,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:20,619 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 106 transitions. [2020-10-13 10:31:20,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:31:20,619 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 106 transitions. [2020-10-13 10:31:20,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:31:20,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:20,620 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:20,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:31:20,620 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:20,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:20,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1194290218, now seen corresponding path program 1 times [2020-10-13 10:31:20,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:20,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70124892] [2020-10-13 10:31:20,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:20,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:20,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:20,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:20,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:31:20,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:20,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-13 10:31:20,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:20,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:31:20,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:31:20,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:31:20,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:20,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:20,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:20,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:20,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:20,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:20,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:20,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:20,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:20,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:20,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:20,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:20,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:20,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:31:20,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70124892] [2020-10-13 10:31:20,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:20,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:31:20,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367642114] [2020-10-13 10:31:20,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:31:20,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:20,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:31:20,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:31:20,919 INFO L87 Difference]: Start difference. First operand 79 states and 106 transitions. Second operand 10 states. [2020-10-13 10:31:21,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:21,291 INFO L93 Difference]: Finished difference Result 99 states and 128 transitions. [2020-10-13 10:31:21,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:31:21,292 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-13 10:31:21,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:21,293 INFO L225 Difference]: With dead ends: 99 [2020-10-13 10:31:21,293 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 10:31:21,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:31:21,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 10:31:21,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 83. [2020-10-13 10:31:21,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 10:31:21,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 111 transitions. [2020-10-13 10:31:21,301 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 111 transitions. Word has length 37 [2020-10-13 10:31:21,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:21,301 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 111 transitions. [2020-10-13 10:31:21,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:31:21,302 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 111 transitions. [2020-10-13 10:31:21,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 10:31:21,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:21,303 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:21,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:31:21,303 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:21,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:21,303 INFO L82 PathProgramCache]: Analyzing trace with hash -907951247, now seen corresponding path program 2 times [2020-10-13 10:31:21,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:21,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052321541] [2020-10-13 10:31:21,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:21,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:21,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:21,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 10:31:21,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:21,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-13 10:31:21,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:21,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:31:21,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:31:21,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:31:21,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:21,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:21,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:21,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:21,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:21,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:21,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:21,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:21,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:21,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:21,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:21,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:21,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:31:21,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052321541] [2020-10-13 10:31:21,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:21,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:31:21,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936146977] [2020-10-13 10:31:21,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:31:21,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:21,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:31:21,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:31:21,634 INFO L87 Difference]: Start difference. First operand 83 states and 111 transitions. Second operand 10 states. [2020-10-13 10:31:22,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:22,074 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2020-10-13 10:31:22,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:31:22,077 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-13 10:31:22,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:22,078 INFO L225 Difference]: With dead ends: 101 [2020-10-13 10:31:22,079 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 10:31:22,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:31:22,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 10:31:22,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 74. [2020-10-13 10:31:22,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 10:31:22,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 99 transitions. [2020-10-13 10:31:22,084 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 99 transitions. Word has length 39 [2020-10-13 10:31:22,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:22,085 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 99 transitions. [2020-10-13 10:31:22,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:31:22,085 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 99 transitions. [2020-10-13 10:31:22,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 10:31:22,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:22,086 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:22,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:31:22,086 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:22,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:22,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1308800881, now seen corresponding path program 1 times [2020-10-13 10:31:22,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:22,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953205967] [2020-10-13 10:31:22,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:22,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:22,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:22,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:22,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:22,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 10:31:22,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:31:22,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 375 [2020-10-13 10:31:22,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:22,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:31:22,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 10:31:22,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:31:22,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:22,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:22,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:22,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:22,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:22,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:22,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:22,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:22,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:22,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:22,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:22,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:22,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:31:22,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953205967] [2020-10-13 10:31:22,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:22,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:31:22,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249577640] [2020-10-13 10:31:22,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:31:22,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:22,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:31:22,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:31:22,576 INFO L87 Difference]: Start difference. First operand 74 states and 99 transitions. Second operand 8 states. [2020-10-13 10:31:22,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:22,787 INFO L93 Difference]: Finished difference Result 99 states and 127 transitions. [2020-10-13 10:31:22,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:31:22,787 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-10-13 10:31:22,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:22,788 INFO L225 Difference]: With dead ends: 99 [2020-10-13 10:31:22,788 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 10:31:22,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:31:22,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 10:31:22,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2020-10-13 10:31:22,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 10:31:22,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 101 transitions. [2020-10-13 10:31:22,795 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 101 transitions. Word has length 39 [2020-10-13 10:31:22,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:22,795 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 101 transitions. [2020-10-13 10:31:22,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:31:22,795 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 101 transitions. [2020-10-13 10:31:22,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 10:31:22,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:22,796 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:22,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:31:22,796 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:22,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:22,797 INFO L82 PathProgramCache]: Analyzing trace with hash -315248798, now seen corresponding path program 2 times [2020-10-13 10:31:22,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:22,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444865324] [2020-10-13 10:31:22,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:22,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:22,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:22,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:22,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 10:31:22,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:22,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-13 10:31:22,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:22,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:31:22,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:31:22,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:31:22,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:23,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:23,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:23,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:23,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:23,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:23,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:23,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:23,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:23,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:23,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:23,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:23,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:23,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:31:23,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444865324] [2020-10-13 10:31:23,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:23,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:31:23,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196034579] [2020-10-13 10:31:23,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:31:23,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:23,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:31:23,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:31:23,170 INFO L87 Difference]: Start difference. First operand 76 states and 101 transitions. Second operand 11 states. [2020-10-13 10:31:23,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:23,475 INFO L93 Difference]: Finished difference Result 97 states and 125 transitions. [2020-10-13 10:31:23,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:31:23,475 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-13 10:31:23,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:23,476 INFO L225 Difference]: With dead ends: 97 [2020-10-13 10:31:23,477 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 10:31:23,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:31:23,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 10:31:23,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2020-10-13 10:31:23,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 10:31:23,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 112 transitions. [2020-10-13 10:31:23,482 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 112 transitions. Word has length 39 [2020-10-13 10:31:23,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:23,483 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 112 transitions. [2020-10-13 10:31:23,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:31:23,483 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 112 transitions. [2020-10-13 10:31:23,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 10:31:23,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:23,484 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:23,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:31:23,485 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:23,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:23,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1608502833, now seen corresponding path program 1 times [2020-10-13 10:31:23,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:23,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642543848] [2020-10-13 10:31:23,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:23,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:23,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:23,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:23,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 10:31:23,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:23,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-13 10:31:23,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:23,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:31:23,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:31:23,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:31:23,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:23,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:23,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:23,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:23,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:23,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:23,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:23,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:23,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:23,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:23,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:23,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:23,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:31:23,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:31:23,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642543848] [2020-10-13 10:31:23,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:23,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:31:23,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506804746] [2020-10-13 10:31:23,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:31:23,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:23,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:31:23,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:31:23,770 INFO L87 Difference]: Start difference. First operand 85 states and 112 transitions. Second operand 10 states. [2020-10-13 10:31:24,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:24,124 INFO L93 Difference]: Finished difference Result 107 states and 136 transitions. [2020-10-13 10:31:24,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:31:24,124 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-13 10:31:24,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:24,125 INFO L225 Difference]: With dead ends: 107 [2020-10-13 10:31:24,125 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 10:31:24,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:31:24,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 10:31:24,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 80. [2020-10-13 10:31:24,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 10:31:24,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 106 transitions. [2020-10-13 10:31:24,130 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 106 transitions. Word has length 39 [2020-10-13 10:31:24,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:24,130 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 106 transitions. [2020-10-13 10:31:24,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:31:24,130 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 106 transitions. [2020-10-13 10:31:24,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 10:31:24,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:24,131 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:24,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:31:24,131 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:24,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:24,132 INFO L82 PathProgramCache]: Analyzing trace with hash -15546846, now seen corresponding path program 1 times [2020-10-13 10:31:24,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:24,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258915612] [2020-10-13 10:31:24,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:24,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:24,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:24,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:24,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 10:31:24,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:24,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-13 10:31:24,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:24,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:31:24,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:31:24,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:31:24,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:24,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:24,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:24,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:24,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:24,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:24,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:24,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:24,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:24,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:24,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:24,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:24,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:31:24,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258915612] [2020-10-13 10:31:24,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:24,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:31:24,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837096501] [2020-10-13 10:31:24,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:31:24,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:24,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:31:24,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:31:24,417 INFO L87 Difference]: Start difference. First operand 80 states and 106 transitions. Second operand 11 states. [2020-10-13 10:31:24,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:24,713 INFO L93 Difference]: Finished difference Result 88 states and 115 transitions. [2020-10-13 10:31:24,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:31:24,714 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-13 10:31:24,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:24,715 INFO L225 Difference]: With dead ends: 88 [2020-10-13 10:31:24,716 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 10:31:24,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:31:24,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 10:31:24,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-13 10:31:24,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 10:31:24,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 108 transitions. [2020-10-13 10:31:24,723 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 108 transitions. Word has length 39 [2020-10-13 10:31:24,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:24,724 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 108 transitions. [2020-10-13 10:31:24,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:31:24,724 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 108 transitions. [2020-10-13 10:31:24,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 10:31:24,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:24,726 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:24,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:31:24,726 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:24,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:24,727 INFO L82 PathProgramCache]: Analyzing trace with hash 2037263357, now seen corresponding path program 3 times [2020-10-13 10:31:24,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:24,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057271886] [2020-10-13 10:31:24,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:24,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:25,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:25,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 10:31:25,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:25,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-10-13 10:31:25,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:25,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:31:25,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:31:25,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:31:25,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:31:25,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:25,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:25,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:25,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:25,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:25,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:25,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:25,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:25,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:25,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:25,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:25,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:25,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:31:25,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057271886] [2020-10-13 10:31:25,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:25,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:31:25,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6296368] [2020-10-13 10:31:25,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:31:25,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:25,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:31:25,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:31:25,441 INFO L87 Difference]: Start difference. First operand 82 states and 108 transitions. Second operand 12 states. [2020-10-13 10:31:26,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:26,036 INFO L93 Difference]: Finished difference Result 112 states and 142 transitions. [2020-10-13 10:31:26,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:31:26,036 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-10-13 10:31:26,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:26,037 INFO L225 Difference]: With dead ends: 112 [2020-10-13 10:31:26,038 INFO L226 Difference]: Without dead ends: 108 [2020-10-13 10:31:26,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:31:26,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-13 10:31:26,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 98. [2020-10-13 10:31:26,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-13 10:31:26,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 127 transitions. [2020-10-13 10:31:26,043 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 127 transitions. Word has length 41 [2020-10-13 10:31:26,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:26,044 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 127 transitions. [2020-10-13 10:31:26,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:31:26,044 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 127 transitions. [2020-10-13 10:31:26,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 10:31:26,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:26,044 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:26,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:31:26,045 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:26,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:26,045 INFO L82 PathProgramCache]: Analyzing trace with hash -181922947, now seen corresponding path program 2 times [2020-10-13 10:31:26,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:26,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644688746] [2020-10-13 10:31:26,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:26,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:26,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:26,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 10:31:26,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:26,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-13 10:31:26,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:26,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:31:26,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:31:26,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:31:26,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:31:26,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:26,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:26,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:26,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:26,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:26,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:31:26,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:26,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:26,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:26,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:26,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:31:26,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644688746] [2020-10-13 10:31:26,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:26,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:31:26,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53688463] [2020-10-13 10:31:26,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:31:26,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:26,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:31:26,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:31:26,529 INFO L87 Difference]: Start difference. First operand 98 states and 127 transitions. Second operand 12 states. [2020-10-13 10:31:27,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:27,109 INFO L93 Difference]: Finished difference Result 123 states and 156 transitions. [2020-10-13 10:31:27,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:31:27,110 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-10-13 10:31:27,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:27,111 INFO L225 Difference]: With dead ends: 123 [2020-10-13 10:31:27,111 INFO L226 Difference]: Without dead ends: 117 [2020-10-13 10:31:27,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:31:27,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-13 10:31:27,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 107. [2020-10-13 10:31:27,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-13 10:31:27,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 138 transitions. [2020-10-13 10:31:27,118 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 138 transitions. Word has length 41 [2020-10-13 10:31:27,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:27,119 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 138 transitions. [2020-10-13 10:31:27,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:31:27,119 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 138 transitions. [2020-10-13 10:31:27,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 10:31:27,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:27,120 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:27,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:31:27,120 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:27,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:27,121 INFO L82 PathProgramCache]: Analyzing trace with hash -646320680, now seen corresponding path program 4 times [2020-10-13 10:31:27,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:27,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097297223] [2020-10-13 10:31:27,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:27,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:27,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:27,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:27,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 10:31:27,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:27,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 253 [2020-10-13 10:31:27,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:27,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:31:27,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:31:27,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:31:27,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:27,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:27,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:27,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:27,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:27,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:27,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:31:27,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:27,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:27,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:27,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:27,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:31:27,830 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:31:27,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097297223] [2020-10-13 10:31:27,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:27,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:31:27,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093623051] [2020-10-13 10:31:27,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:31:27,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:27,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:31:27,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:31:27,835 INFO L87 Difference]: Start difference. First operand 107 states and 138 transitions. Second operand 13 states. [2020-10-13 10:31:28,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:28,502 INFO L93 Difference]: Finished difference Result 127 states and 160 transitions. [2020-10-13 10:31:28,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:31:28,503 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-10-13 10:31:28,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:28,504 INFO L225 Difference]: With dead ends: 127 [2020-10-13 10:31:28,504 INFO L226 Difference]: Without dead ends: 123 [2020-10-13 10:31:28,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:31:28,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-13 10:31:28,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 113. [2020-10-13 10:31:28,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-13 10:31:28,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 145 transitions. [2020-10-13 10:31:28,512 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 145 transitions. Word has length 43 [2020-10-13 10:31:28,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:28,512 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 145 transitions. [2020-10-13 10:31:28,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:31:28,512 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 145 transitions. [2020-10-13 10:31:28,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 10:31:28,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:28,513 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:28,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:31:28,513 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:28,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:28,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1704764659, now seen corresponding path program 5 times [2020-10-13 10:31:28,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:28,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675629881] [2020-10-13 10:31:28,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:28,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:28,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:28,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 10:31:28,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:28,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 293 [2020-10-13 10:31:28,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:28,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:31:28,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:31:28,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 10:31:28,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:31:29,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:29,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:29,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:29,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:29,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:29,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:29,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:29,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:29,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:29,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:29,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:29,091 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:31:29,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675629881] [2020-10-13 10:31:29,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:29,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:31:29,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365534081] [2020-10-13 10:31:29,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:31:29,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:29,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:31:29,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:31:29,099 INFO L87 Difference]: Start difference. First operand 113 states and 145 transitions. Second operand 13 states. [2020-10-13 10:31:29,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:29,774 INFO L93 Difference]: Finished difference Result 129 states and 162 transitions. [2020-10-13 10:31:29,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:31:29,775 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-10-13 10:31:29,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:29,776 INFO L225 Difference]: With dead ends: 129 [2020-10-13 10:31:29,776 INFO L226 Difference]: Without dead ends: 117 [2020-10-13 10:31:29,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:31:29,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-13 10:31:29,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 99. [2020-10-13 10:31:29,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-13 10:31:29,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 128 transitions. [2020-10-13 10:31:29,782 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 128 transitions. Word has length 45 [2020-10-13 10:31:29,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:29,782 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 128 transitions. [2020-10-13 10:31:29,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:31:29,782 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 128 transitions. [2020-10-13 10:31:29,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 10:31:29,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:29,783 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:29,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:31:29,783 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:29,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:29,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1570483469, now seen corresponding path program 2 times [2020-10-13 10:31:29,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:29,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192955688] [2020-10-13 10:31:29,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:29,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:29,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:29,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:30,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:30,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:30,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:30,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 10:31:30,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:31:30,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 998 [2020-10-13 10:31:30,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:30,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:31:30,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 10:31:30,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:31:30,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:31:31,084 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2020-10-13 10:31:31,274 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2020-10-13 10:31:31,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:31,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:31,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:31,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:31,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:31,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:31,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:31,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:31,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:31,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:31,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:31,570 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:31:31,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192955688] [2020-10-13 10:31:31,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:31,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:31:31,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176758534] [2020-10-13 10:31:31,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:31:31,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:31,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:31:31,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:31:31,573 INFO L87 Difference]: Start difference. First operand 99 states and 128 transitions. Second operand 12 states. [2020-10-13 10:31:32,277 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 74 [2020-10-13 10:31:32,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:32,565 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2020-10-13 10:31:32,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:31:32,565 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-10-13 10:31:32,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:32,566 INFO L225 Difference]: With dead ends: 118 [2020-10-13 10:31:32,566 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 10:31:32,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:31:32,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 10:31:32,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2020-10-13 10:31:32,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-13 10:31:32,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 127 transitions. [2020-10-13 10:31:32,574 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 127 transitions. Word has length 45 [2020-10-13 10:31:32,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:32,574 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 127 transitions. [2020-10-13 10:31:32,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:31:32,575 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 127 transitions. [2020-10-13 10:31:32,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 10:31:32,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:32,576 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1] [2020-10-13 10:31:32,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:31:32,576 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:32,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:32,576 INFO L82 PathProgramCache]: Analyzing trace with hash 61167780, now seen corresponding path program 6 times [2020-10-13 10:31:32,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:32,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871616016] [2020-10-13 10:31:32,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:32,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:32,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:32,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:32,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 10:31:32,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:32,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-10-13 10:31:32,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:32,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:31:32,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:31:32,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:31:32,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:33,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:33,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:33,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:33,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:33,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:33,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:33,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:33,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:33,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:33,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:33,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:33,219 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:31:33,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871616016] [2020-10-13 10:31:33,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:33,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:31:33,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584909738] [2020-10-13 10:31:33,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:31:33,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:33,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:31:33,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:31:33,221 INFO L87 Difference]: Start difference. First operand 99 states and 127 transitions. Second operand 14 states. [2020-10-13 10:31:33,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:33,928 INFO L93 Difference]: Finished difference Result 123 states and 154 transitions. [2020-10-13 10:31:33,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:31:33,929 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-13 10:31:33,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:33,930 INFO L225 Difference]: With dead ends: 123 [2020-10-13 10:31:33,930 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 10:31:33,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:31:33,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 10:31:33,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2020-10-13 10:31:33,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 10:31:33,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 143 transitions. [2020-10-13 10:31:33,936 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 143 transitions. Word has length 45 [2020-10-13 10:31:33,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:33,937 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 143 transitions. [2020-10-13 10:31:33,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:31:33,937 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 143 transitions. [2020-10-13 10:31:33,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 10:31:33,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:33,937 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:33,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:31:33,938 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:33,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:33,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1874503245, now seen corresponding path program 1 times [2020-10-13 10:31:33,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:33,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393915714] [2020-10-13 10:31:33,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:33,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:33,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:34,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:34,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:34,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 10:31:34,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:31:34,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 560 [2020-10-13 10:31:34,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:34,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:31:34,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:31:34,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:31:34,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:34,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:34,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:34,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:34,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:34,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:34,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:34,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:34,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:34,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:34,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:34,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:34,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:31:34,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393915714] [2020-10-13 10:31:34,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:34,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:31:34,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436946500] [2020-10-13 10:31:34,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:31:34,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:34,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:31:34,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:31:34,832 INFO L87 Difference]: Start difference. First operand 112 states and 143 transitions. Second operand 12 states. [2020-10-13 10:31:35,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:35,455 INFO L93 Difference]: Finished difference Result 133 states and 165 transitions. [2020-10-13 10:31:35,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:31:35,455 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-10-13 10:31:35,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:35,456 INFO L225 Difference]: With dead ends: 133 [2020-10-13 10:31:35,456 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 10:31:35,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:31:35,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 10:31:35,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2020-10-13 10:31:35,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 10:31:35,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 142 transitions. [2020-10-13 10:31:35,463 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 142 transitions. Word has length 45 [2020-10-13 10:31:35,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:35,463 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 142 transitions. [2020-10-13 10:31:35,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:31:35,464 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 142 transitions. [2020-10-13 10:31:35,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 10:31:35,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:35,465 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:35,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:31:35,465 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:35,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:35,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1623736205, now seen corresponding path program 3 times [2020-10-13 10:31:35,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:35,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694140564] [2020-10-13 10:31:35,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:35,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:35,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:35,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:35,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 10:31:35,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:35,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-13 10:31:35,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:35,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:31:35,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:31:35,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:31:35,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:36,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:36,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:36,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:36,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:36,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:36,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:36,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:36,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:36,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:36,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:36,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:36,056 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:31:36,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694140564] [2020-10-13 10:31:36,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:36,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:31:36,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340569909] [2020-10-13 10:31:36,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:31:36,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:36,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:31:36,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:31:36,065 INFO L87 Difference]: Start difference. First operand 112 states and 142 transitions. Second operand 13 states. [2020-10-13 10:31:36,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:36,695 INFO L93 Difference]: Finished difference Result 130 states and 161 transitions. [2020-10-13 10:31:36,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:31:36,697 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-10-13 10:31:36,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:36,698 INFO L225 Difference]: With dead ends: 130 [2020-10-13 10:31:36,699 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 10:31:36,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:31:36,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 10:31:36,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 107. [2020-10-13 10:31:36,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-13 10:31:36,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 136 transitions. [2020-10-13 10:31:36,705 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 136 transitions. Word has length 45 [2020-10-13 10:31:36,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:36,705 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 136 transitions. [2020-10-13 10:31:36,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:31:36,705 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 136 transitions. [2020-10-13 10:31:36,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 10:31:36,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:36,706 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:36,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:31:36,706 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:36,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:36,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1032618020, now seen corresponding path program 2 times [2020-10-13 10:31:36,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:36,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494006416] [2020-10-13 10:31:36,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:36,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:36,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:36,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 10:31:36,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:36,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-13 10:31:36,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:36,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:31:36,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:31:36,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 10:31:36,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:37,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:37,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:37,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:37,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:37,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:37,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:37,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:37,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:37,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:37,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:37,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:31:37,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494006416] [2020-10-13 10:31:37,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:37,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:31:37,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299372771] [2020-10-13 10:31:37,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:31:37,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:37,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:31:37,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:31:37,254 INFO L87 Difference]: Start difference. First operand 107 states and 136 transitions. Second operand 14 states. [2020-10-13 10:31:37,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:37,817 INFO L93 Difference]: Finished difference Result 115 states and 145 transitions. [2020-10-13 10:31:37,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:31:37,818 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-13 10:31:37,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:37,819 INFO L225 Difference]: With dead ends: 115 [2020-10-13 10:31:37,819 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 10:31:37,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:31:37,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 10:31:37,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-13 10:31:37,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 10:31:37,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 138 transitions. [2020-10-13 10:31:37,826 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 138 transitions. Word has length 45 [2020-10-13 10:31:37,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:37,827 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 138 transitions. [2020-10-13 10:31:37,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:31:37,827 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 138 transitions. [2020-10-13 10:31:37,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 10:31:37,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:37,828 INFO L422 BasicCegarLoop]: trace histogram [4, 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 10:31:37,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 10:31:37,828 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:37,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:37,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1298625345, now seen corresponding path program 7 times [2020-10-13 10:31:37,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:37,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352889863] [2020-10-13 10:31:37,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:37,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:37,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:38,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:38,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 10:31:38,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:38,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 350 [2020-10-13 10:31:38,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:38,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:31:38,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:31:38,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:31:38,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:38,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:38,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:38,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:38,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:38,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:38,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:38,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:38,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:38,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:38,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:38,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:31:38,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352889863] [2020-10-13 10:31:38,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:38,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:31:38,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021055546] [2020-10-13 10:31:38,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:31:38,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:38,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:31:38,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:31:38,543 INFO L87 Difference]: Start difference. First operand 109 states and 138 transitions. Second operand 15 states. [2020-10-13 10:31:39,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:39,533 INFO L93 Difference]: Finished difference Result 154 states and 189 transitions. [2020-10-13 10:31:39,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:31:39,534 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-10-13 10:31:39,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:39,535 INFO L225 Difference]: With dead ends: 154 [2020-10-13 10:31:39,535 INFO L226 Difference]: Without dead ends: 150 [2020-10-13 10:31:39,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:31:39,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-13 10:31:39,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 132. [2020-10-13 10:31:39,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-13 10:31:39,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 165 transitions. [2020-10-13 10:31:39,543 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 165 transitions. Word has length 47 [2020-10-13 10:31:39,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:39,544 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 165 transitions. [2020-10-13 10:31:39,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:31:39,544 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 165 transitions. [2020-10-13 10:31:39,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 10:31:39,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:39,545 INFO L422 BasicCegarLoop]: trace histogram [4, 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 10:31:39,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 10:31:39,545 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:39,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:39,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1581556991, now seen corresponding path program 4 times [2020-10-13 10:31:39,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:39,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059115451] [2020-10-13 10:31:39,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:39,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:39,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:39,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:39,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 10:31:39,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:39,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-10-13 10:31:39,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:39,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:31:39,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:31:39,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:31:39,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:40,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:40,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:40,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:40,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:40,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:40,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:40,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:40,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:40,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:40,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:40,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:31:40,359 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:31:40,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059115451] [2020-10-13 10:31:40,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:40,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:31:40,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532821812] [2020-10-13 10:31:40,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:31:40,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:40,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:31:40,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:31:40,362 INFO L87 Difference]: Start difference. First operand 132 states and 165 transitions. Second operand 15 states. [2020-10-13 10:31:41,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:41,510 INFO L93 Difference]: Finished difference Result 161 states and 198 transitions. [2020-10-13 10:31:41,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:31:41,511 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-10-13 10:31:41,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:41,512 INFO L225 Difference]: With dead ends: 161 [2020-10-13 10:31:41,512 INFO L226 Difference]: Without dead ends: 155 [2020-10-13 10:31:41,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:31:41,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-13 10:31:41,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 141. [2020-10-13 10:31:41,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-13 10:31:41,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 176 transitions. [2020-10-13 10:31:41,521 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 176 transitions. Word has length 47 [2020-10-13 10:31:41,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:41,521 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 176 transitions. [2020-10-13 10:31:41,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:31:41,521 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 176 transitions. [2020-10-13 10:31:41,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 10:31:41,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:41,522 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:41,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 10:31:41,523 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:41,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:41,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1905206810, now seen corresponding path program 8 times [2020-10-13 10:31:41,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:41,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077326531] [2020-10-13 10:31:41,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:41,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:41,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:42,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:42,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 10:31:42,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:42,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 499 [2020-10-13 10:31:42,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:42,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:31:42,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:31:42,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 10:31:42,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:42,376 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-10-13 10:31:42,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:42,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:42,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:42,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:42,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:42,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:42,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:42,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:42,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:42,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:42,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:42,856 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:31:42,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077326531] [2020-10-13 10:31:42,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:42,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:31:42,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756817906] [2020-10-13 10:31:42,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:31:42,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:42,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:31:42,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:31:42,859 INFO L87 Difference]: Start difference. First operand 141 states and 176 transitions. Second operand 16 states. [2020-10-13 10:31:43,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:43,753 INFO L93 Difference]: Finished difference Result 171 states and 209 transitions. [2020-10-13 10:31:43,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:31:43,754 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-10-13 10:31:43,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:43,756 INFO L225 Difference]: With dead ends: 171 [2020-10-13 10:31:43,756 INFO L226 Difference]: Without dead ends: 167 [2020-10-13 10:31:43,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:31:43,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-13 10:31:43,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 149. [2020-10-13 10:31:43,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-13 10:31:43,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 185 transitions. [2020-10-13 10:31:43,767 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 185 transitions. Word has length 49 [2020-10-13 10:31:43,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:43,767 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 185 transitions. [2020-10-13 10:31:43,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:31:43,767 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 185 transitions. [2020-10-13 10:31:43,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 10:31:43,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:43,768 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:43,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 10:31:43,769 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:43,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:43,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1296356533, now seen corresponding path program 9 times [2020-10-13 10:31:43,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:43,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565632382] [2020-10-13 10:31:43,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:43,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:44,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:44,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 10:31:44,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:44,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 443 [2020-10-13 10:31:44,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:44,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:31:44,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:31:44,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:31:44,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:44,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:44,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:44,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:44,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:44,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:44,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:44,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:44,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:44,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:44,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:44,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:44,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:44,758 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:31:44,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565632382] [2020-10-13 10:31:44,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:44,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:31:44,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056627335] [2020-10-13 10:31:44,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:31:44,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:44,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:31:44,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:31:44,760 INFO L87 Difference]: Start difference. First operand 149 states and 185 transitions. Second operand 16 states. [2020-10-13 10:31:45,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:45,615 INFO L93 Difference]: Finished difference Result 173 states and 211 transitions. [2020-10-13 10:31:45,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:31:45,616 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-10-13 10:31:45,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:45,618 INFO L225 Difference]: With dead ends: 173 [2020-10-13 10:31:45,618 INFO L226 Difference]: Without dead ends: 159 [2020-10-13 10:31:45,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:31:45,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-13 10:31:45,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 130. [2020-10-13 10:31:45,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-13 10:31:45,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 163 transitions. [2020-10-13 10:31:45,627 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 163 transitions. Word has length 51 [2020-10-13 10:31:45,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:45,627 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 163 transitions. [2020-10-13 10:31:45,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:31:45,628 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 163 transitions. [2020-10-13 10:31:45,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 10:31:45,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:45,628 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:45,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 10:31:45,629 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:45,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:45,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1276330827, now seen corresponding path program 3 times [2020-10-13 10:31:45,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:45,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281502366] [2020-10-13 10:31:45,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:45,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:45,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:45,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:45,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:46,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:46,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:46,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:46,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:47,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:47,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 10:31:47,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 10:31:47,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2141 [2020-10-13 10:31:47,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:47,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:31:47,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:31:47,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:31:47,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:47,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:47,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:47,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:47,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:47,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:47,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:47,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:47,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:47,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:47,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:47,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:47,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:47,958 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-13 10:31:47,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281502366] [2020-10-13 10:31:47,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:47,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:31:47,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602472659] [2020-10-13 10:31:47,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:31:47,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:47,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:31:47,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:31:47,959 INFO L87 Difference]: Start difference. First operand 130 states and 163 transitions. Second operand 13 states. [2020-10-13 10:31:48,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:48,493 INFO L93 Difference]: Finished difference Result 153 states and 188 transitions. [2020-10-13 10:31:48,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:31:48,493 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-13 10:31:48,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:48,495 INFO L225 Difference]: With dead ends: 153 [2020-10-13 10:31:48,495 INFO L226 Difference]: Without dead ends: 132 [2020-10-13 10:31:48,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:31:48,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-13 10:31:48,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2020-10-13 10:31:48,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-13 10:31:48,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 161 transitions. [2020-10-13 10:31:48,503 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 161 transitions. Word has length 51 [2020-10-13 10:31:48,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:48,503 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 161 transitions. [2020-10-13 10:31:48,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:31:48,503 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 161 transitions. [2020-10-13 10:31:48,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 10:31:48,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:48,504 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 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 10:31:48,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 10:31:48,505 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:48,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:48,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1947246554, now seen corresponding path program 10 times [2020-10-13 10:31:48,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:48,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929520597] [2020-10-13 10:31:48,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:48,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:49,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:49,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 10:31:49,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:49,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 526 [2020-10-13 10:31:49,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:49,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:31:49,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:31:49,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 10:31:49,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:49,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:49,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:49,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:49,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:49,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:49,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:49,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:49,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:49,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:49,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:49,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:49,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:49,765 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:31:49,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929520597] [2020-10-13 10:31:49,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:49,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:31:49,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716086] [2020-10-13 10:31:49,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:31:49,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:49,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:31:49,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:31:49,768 INFO L87 Difference]: Start difference. First operand 130 states and 161 transitions. Second operand 17 states. [2020-10-13 10:31:50,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:50,789 INFO L93 Difference]: Finished difference Result 158 states and 192 transitions. [2020-10-13 10:31:50,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:31:50,789 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 51 [2020-10-13 10:31:50,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:50,791 INFO L225 Difference]: With dead ends: 158 [2020-10-13 10:31:50,791 INFO L226 Difference]: Without dead ends: 154 [2020-10-13 10:31:50,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:31:50,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-13 10:31:50,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 145. [2020-10-13 10:31:50,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-13 10:31:50,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 179 transitions. [2020-10-13 10:31:50,800 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 179 transitions. Word has length 51 [2020-10-13 10:31:50,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:50,800 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 179 transitions. [2020-10-13 10:31:50,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:31:50,800 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 179 transitions. [2020-10-13 10:31:50,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 10:31:50,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:50,801 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:50,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 10:31:50,802 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:50,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:50,802 INFO L82 PathProgramCache]: Analyzing trace with hash 119386997, now seen corresponding path program 3 times [2020-10-13 10:31:50,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:50,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574810254] [2020-10-13 10:31:50,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:50,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:50,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:51,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:51,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:51,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 10:31:51,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:31:51,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1042 [2020-10-13 10:31:51,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:51,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:31:51,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:31:51,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 10:31:51,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:52,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:52,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:52,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:52,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:52,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:52,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:52,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:52,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:52,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:52,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:52,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:52,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:52,211 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 10:31:52,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574810254] [2020-10-13 10:31:52,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:52,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:31:52,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066454186] [2020-10-13 10:31:52,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:31:52,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:52,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:31:52,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:31:52,212 INFO L87 Difference]: Start difference. First operand 145 states and 179 transitions. Second operand 14 states. [2020-10-13 10:31:53,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:53,037 INFO L93 Difference]: Finished difference Result 168 states and 203 transitions. [2020-10-13 10:31:53,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:31:53,039 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-10-13 10:31:53,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:53,040 INFO L225 Difference]: With dead ends: 168 [2020-10-13 10:31:53,040 INFO L226 Difference]: Without dead ends: 151 [2020-10-13 10:31:53,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:31:53,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-13 10:31:53,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 145. [2020-10-13 10:31:53,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-13 10:31:53,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 178 transitions. [2020-10-13 10:31:53,048 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 178 transitions. Word has length 51 [2020-10-13 10:31:53,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:53,049 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 178 transitions. [2020-10-13 10:31:53,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:31:53,049 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 178 transitions. [2020-10-13 10:31:53,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 10:31:53,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:53,050 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:53,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 10:31:53,050 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:53,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:53,050 INFO L82 PathProgramCache]: Analyzing trace with hash 14158389, now seen corresponding path program 4 times [2020-10-13 10:31:53,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:53,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564985202] [2020-10-13 10:31:53,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:53,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:53,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:53,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:53,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:53,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 10:31:53,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:31:53,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 693 [2020-10-13 10:31:53,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:53,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:31:53,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:31:53,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:31:53,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:54,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:54,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:54,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:54,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:54,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:54,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:54,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:54,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:54,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:54,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:54,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:54,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:54,214 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:31:54,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564985202] [2020-10-13 10:31:54,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:54,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:31:54,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833567318] [2020-10-13 10:31:54,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:31:54,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:54,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:31:54,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:31:54,215 INFO L87 Difference]: Start difference. First operand 145 states and 178 transitions. Second operand 15 states. [2020-10-13 10:31:55,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:55,255 INFO L93 Difference]: Finished difference Result 170 states and 204 transitions. [2020-10-13 10:31:55,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:31:55,256 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-10-13 10:31:55,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:55,257 INFO L225 Difference]: With dead ends: 170 [2020-10-13 10:31:55,257 INFO L226 Difference]: Without dead ends: 153 [2020-10-13 10:31:55,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:31:55,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-13 10:31:55,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 145. [2020-10-13 10:31:55,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-13 10:31:55,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 177 transitions. [2020-10-13 10:31:55,267 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 177 transitions. Word has length 51 [2020-10-13 10:31:55,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:55,267 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 177 transitions. [2020-10-13 10:31:55,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:31:55,268 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 177 transitions. [2020-10-13 10:31:55,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 10:31:55,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:55,268 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:55,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 10:31:55,269 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:55,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:55,269 INFO L82 PathProgramCache]: Analyzing trace with hash 483115253, now seen corresponding path program 5 times [2020-10-13 10:31:55,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:55,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521693475] [2020-10-13 10:31:55,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:55,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:55,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:55,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:55,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 10:31:55,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:55,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 328 [2020-10-13 10:31:55,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:55,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:31:55,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:31:55,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:31:55,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:56,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:56,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:56,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:56,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:56,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:56,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:56,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:56,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:56,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:56,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:56,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:56,182 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:31:56,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521693475] [2020-10-13 10:31:56,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:56,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:31:56,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347911025] [2020-10-13 10:31:56,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:31:56,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:56,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:31:56,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:31:56,184 INFO L87 Difference]: Start difference. First operand 145 states and 177 transitions. Second operand 16 states. [2020-10-13 10:31:57,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:57,072 INFO L93 Difference]: Finished difference Result 167 states and 200 transitions. [2020-10-13 10:31:57,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:31:57,073 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-10-13 10:31:57,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:57,074 INFO L225 Difference]: With dead ends: 167 [2020-10-13 10:31:57,074 INFO L226 Difference]: Without dead ends: 150 [2020-10-13 10:31:57,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:31:57,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-13 10:31:57,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 140. [2020-10-13 10:31:57,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-13 10:31:57,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 171 transitions. [2020-10-13 10:31:57,082 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 171 transitions. Word has length 51 [2020-10-13 10:31:57,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:57,082 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 171 transitions. [2020-10-13 10:31:57,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:31:57,083 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 171 transitions. [2020-10-13 10:31:57,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 10:31:57,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:57,083 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:57,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 10:31:57,084 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:57,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:57,084 INFO L82 PathProgramCache]: Analyzing trace with hash 2028951654, now seen corresponding path program 5 times [2020-10-13 10:31:57,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:57,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650915104] [2020-10-13 10:31:57,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:57,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:57,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:57,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:57,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 10:31:57,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:57,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-13 10:31:57,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:57,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:31:57,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:31:57,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:31:57,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:58,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:58,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:58,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:58,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:58,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:58,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:58,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:58,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:58,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:58,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:58,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:31:58,130 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:31:58,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650915104] [2020-10-13 10:31:58,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:58,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:31:58,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884697665] [2020-10-13 10:31:58,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:31:58,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:58,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:31:58,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:31:58,133 INFO L87 Difference]: Start difference. First operand 140 states and 171 transitions. Second operand 17 states. [2020-10-13 10:31:59,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:59,563 INFO L93 Difference]: Finished difference Result 148 states and 180 transitions. [2020-10-13 10:31:59,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:31:59,564 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 51 [2020-10-13 10:31:59,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:59,565 INFO L225 Difference]: With dead ends: 148 [2020-10-13 10:31:59,565 INFO L226 Difference]: Without dead ends: 142 [2020-10-13 10:31:59,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:31:59,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-13 10:31:59,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-10-13 10:31:59,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 10:31:59,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 173 transitions. [2020-10-13 10:31:59,574 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 173 transitions. Word has length 51 [2020-10-13 10:31:59,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:59,575 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 173 transitions. [2020-10-13 10:31:59,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:31:59,575 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 173 transitions. [2020-10-13 10:31:59,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 10:31:59,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:59,576 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:59,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 10:31:59,576 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:59,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:59,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1350482881, now seen corresponding path program 11 times [2020-10-13 10:31:59,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:59,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240320421] [2020-10-13 10:31:59,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:59,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:00,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:00,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 10:32:00,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:00,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 432 [2020-10-13 10:32:00,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:00,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:32:00,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:32:00,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 10:32:00,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:00,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:32:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:00,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:00,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:00,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:32:00,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:00,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:32:00,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:00,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:32:00,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:32:00,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:32:00,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:00,772 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:32:00,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240320421] [2020-10-13 10:32:00,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:32:00,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:32:00,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960193629] [2020-10-13 10:32:00,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:32:00,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:32:00,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:32:00,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:32:00,774 INFO L87 Difference]: Start difference. First operand 142 states and 173 transitions. Second operand 18 states. [2020-10-13 10:32:02,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:32:02,300 INFO L93 Difference]: Finished difference Result 204 states and 242 transitions. [2020-10-13 10:32:02,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:32:02,300 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 53 [2020-10-13 10:32:02,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:32:02,302 INFO L225 Difference]: With dead ends: 204 [2020-10-13 10:32:02,302 INFO L226 Difference]: Without dead ends: 200 [2020-10-13 10:32:02,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:32:02,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-13 10:32:02,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 174. [2020-10-13 10:32:02,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-13 10:32:02,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 210 transitions. [2020-10-13 10:32:02,311 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 210 transitions. Word has length 53 [2020-10-13 10:32:02,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:32:02,311 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 210 transitions. [2020-10-13 10:32:02,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:32:02,312 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 210 transitions. [2020-10-13 10:32:02,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 10:32:02,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:32:02,312 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:32:02,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 10:32:02,313 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:32:02,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:32:02,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1231537345, now seen corresponding path program 6 times [2020-10-13 10:32:02,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:32:02,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399090192] [2020-10-13 10:32:02,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:32:02,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:02,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:02,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:02,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 10:32:02,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:02,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 384 [2020-10-13 10:32:02,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:02,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:32:02,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:32:02,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 10:32:02,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:03,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:32:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:03,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:03,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:03,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:32:03,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:03,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:32:03,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:03,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:32:03,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:32:03,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:32:03,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:03,381 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:32:03,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399090192] [2020-10-13 10:32:03,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:32:03,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:32:03,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967689046] [2020-10-13 10:32:03,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:32:03,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:32:03,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:32:03,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:32:03,382 INFO L87 Difference]: Start difference. First operand 174 states and 210 transitions. Second operand 18 states. [2020-10-13 10:32:04,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:32:04,856 INFO L93 Difference]: Finished difference Result 205 states and 244 transitions. [2020-10-13 10:32:04,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:32:04,857 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 53 [2020-10-13 10:32:04,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:32:04,859 INFO L225 Difference]: With dead ends: 205 [2020-10-13 10:32:04,859 INFO L226 Difference]: Without dead ends: 199 [2020-10-13 10:32:04,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:32:04,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-13 10:32:04,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 183. [2020-10-13 10:32:04,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-13 10:32:04,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 221 transitions. [2020-10-13 10:32:04,870 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 221 transitions. Word has length 53 [2020-10-13 10:32:04,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:32:04,870 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 221 transitions. [2020-10-13 10:32:04,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:32:04,870 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 221 transitions. [2020-10-13 10:32:04,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 10:32:04,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:32:04,871 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:32:04,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 10:32:04,871 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:32:04,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:32:04,871 INFO L82 PathProgramCache]: Analyzing trace with hash 782605468, now seen corresponding path program 12 times [2020-10-13 10:32:04,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:32:04,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987751861] [2020-10-13 10:32:04,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:32:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:04,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:05,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:05,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 10:32:05,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:05,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 419 [2020-10-13 10:32:05,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:05,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:32:05,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:32:05,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 10:32:05,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:06,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:32:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:06,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:06,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:06,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:32:06,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:06,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:32:06,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:06,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:32:06,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:32:06,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:32:06,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:06,144 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:32:06,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987751861] [2020-10-13 10:32:06,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:32:06,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:32:06,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034419303] [2020-10-13 10:32:06,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:32:06,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:32:06,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:32:06,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:32:06,146 INFO L87 Difference]: Start difference. First operand 183 states and 221 transitions. Second operand 19 states. [2020-10-13 10:32:07,209 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-10-13 10:32:07,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:32:07,915 INFO L93 Difference]: Finished difference Result 223 states and 264 transitions. [2020-10-13 10:32:07,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:32:07,916 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-10-13 10:32:07,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:32:07,917 INFO L225 Difference]: With dead ends: 223 [2020-10-13 10:32:07,918 INFO L226 Difference]: Without dead ends: 219 [2020-10-13 10:32:07,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:32:07,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-13 10:32:07,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 193. [2020-10-13 10:32:07,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-13 10:32:07,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 232 transitions. [2020-10-13 10:32:07,930 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 232 transitions. Word has length 55 [2020-10-13 10:32:07,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:32:07,930 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 232 transitions. [2020-10-13 10:32:07,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:32:07,930 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 232 transitions. [2020-10-13 10:32:07,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 10:32:07,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:32:07,931 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:32:07,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 10:32:07,931 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:32:07,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:32:07,932 INFO L82 PathProgramCache]: Analyzing trace with hash 513258167, now seen corresponding path program 13 times [2020-10-13 10:32:07,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:32:07,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393144010] [2020-10-13 10:32:07,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:32:07,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:07,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:08,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:08,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 10:32:08,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:08,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 435 [2020-10-13 10:32:08,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:08,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:32:08,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:32:08,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 10:32:08,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:09,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:32:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:09,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:09,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:09,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:32:09,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:09,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:32:09,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:09,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:32:09,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:32:09,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:32:09,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:09,186 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:32:09,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393144010] [2020-10-13 10:32:09,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:32:09,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:32:09,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214447356] [2020-10-13 10:32:09,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:32:09,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:32:09,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:32:09,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:32:09,188 INFO L87 Difference]: Start difference. First operand 193 states and 232 transitions. Second operand 19 states. [2020-10-13 10:32:10,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:32:10,729 INFO L93 Difference]: Finished difference Result 225 states and 266 transitions. [2020-10-13 10:32:10,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:32:10,730 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 57 [2020-10-13 10:32:10,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:32:10,732 INFO L225 Difference]: With dead ends: 225 [2020-10-13 10:32:10,732 INFO L226 Difference]: Without dead ends: 206 [2020-10-13 10:32:10,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:32:10,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-13 10:32:10,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 167. [2020-10-13 10:32:10,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-13 10:32:10,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 202 transitions. [2020-10-13 10:32:10,741 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 202 transitions. Word has length 57 [2020-10-13 10:32:10,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:32:10,742 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 202 transitions. [2020-10-13 10:32:10,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:32:10,742 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 202 transitions. [2020-10-13 10:32:10,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 10:32:10,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:32:10,743 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:32:10,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 10:32:10,743 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:32:10,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:32:10,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1556948456, now seen corresponding path program 14 times [2020-10-13 10:32:10,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:32:10,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659440951] [2020-10-13 10:32:10,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:32:10,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:10,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:11,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:11,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 10:32:11,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:11,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 462 [2020-10-13 10:32:11,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:11,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:32:11,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:32:11,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 10:32:11,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:12,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:32:12,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:12,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:12,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:12,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:32:12,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:12,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:32:12,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:12,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:32:12,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:32:12,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:32:12,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:12,267 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:32:12,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659440951] [2020-10-13 10:32:12,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:32:12,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:32:12,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789554035] [2020-10-13 10:32:12,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:32:12,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:32:12,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:32:12,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:32:12,269 INFO L87 Difference]: Start difference. First operand 167 states and 202 transitions. Second operand 20 states. [2020-10-13 10:32:13,201 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2020-10-13 10:32:13,360 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2020-10-13 10:32:13,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:32:13,758 INFO L93 Difference]: Finished difference Result 199 states and 237 transitions. [2020-10-13 10:32:13,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:32:13,759 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 57 [2020-10-13 10:32:13,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:32:13,761 INFO L225 Difference]: With dead ends: 199 [2020-10-13 10:32:13,762 INFO L226 Difference]: Without dead ends: 195 [2020-10-13 10:32:13,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:32:13,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-13 10:32:13,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 184. [2020-10-13 10:32:13,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-13 10:32:13,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 222 transitions. [2020-10-13 10:32:13,775 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 222 transitions. Word has length 57 [2020-10-13 10:32:13,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:32:13,776 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 222 transitions. [2020-10-13 10:32:13,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:32:13,776 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 222 transitions. [2020-10-13 10:32:13,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 10:32:13,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:32:13,777 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 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, 1, 1] [2020-10-13 10:32:13,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 10:32:13,777 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:32:13,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:32:13,778 INFO L82 PathProgramCache]: Analyzing trace with hash -792315017, now seen corresponding path program 6 times [2020-10-13 10:32:13,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:32:13,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994679229] [2020-10-13 10:32:13,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:32:13,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:13,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:14,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:14,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:14,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:15,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:15,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 10:32:15,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:32:15,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1816 [2020-10-13 10:32:15,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:15,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:32:15,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:32:15,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:32:15,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:15,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:32:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:15,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:15,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:15,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:32:15,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:15,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:32:15,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:15,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:32:15,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:32:15,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:32:15,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:16,001 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 22 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-13 10:32:16,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994679229] [2020-10-13 10:32:16,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:32:16,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:32:16,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759438614] [2020-10-13 10:32:16,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:32:16,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:32:16,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:32:16,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:32:16,002 INFO L87 Difference]: Start difference. First operand 184 states and 222 transitions. Second operand 16 states. [2020-10-13 10:32:16,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:32:16,866 INFO L93 Difference]: Finished difference Result 213 states and 254 transitions. [2020-10-13 10:32:16,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:32:16,867 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2020-10-13 10:32:16,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:32:16,868 INFO L225 Difference]: With dead ends: 213 [2020-10-13 10:32:16,868 INFO L226 Difference]: Without dead ends: 186 [2020-10-13 10:32:16,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:32:16,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-13 10:32:16,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-10-13 10:32:16,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-13 10:32:16,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 220 transitions. [2020-10-13 10:32:16,884 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 220 transitions. Word has length 57 [2020-10-13 10:32:16,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:32:16,884 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 220 transitions. [2020-10-13 10:32:16,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:32:16,885 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 220 transitions. [2020-10-13 10:32:16,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 10:32:16,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:32:16,886 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 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 10:32:16,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 10:32:16,886 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:32:16,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:32:16,886 INFO L82 PathProgramCache]: Analyzing trace with hash 462717495, now seen corresponding path program 7 times [2020-10-13 10:32:16,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:32:16,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373288270] [2020-10-13 10:32:16,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:32:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:16,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:17,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:17,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:18,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:18,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 10:32:18,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:32:18,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1219 [2020-10-13 10:32:18,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:18,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:32:18,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:32:18,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:32:18,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:18,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:32:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:18,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:18,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:18,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:32:18,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:18,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:32:18,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:18,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:32:18,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:32:18,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:32:18,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 10:32:18,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373288270] [2020-10-13 10:32:18,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:32:18,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:32:18,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131632269] [2020-10-13 10:32:18,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:32:18,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:32:18,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:32:18,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:32:18,849 INFO L87 Difference]: Start difference. First operand 184 states and 220 transitions. Second operand 17 states. [2020-10-13 10:32:20,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:32:20,411 INFO L93 Difference]: Finished difference Result 211 states and 248 transitions. [2020-10-13 10:32:20,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:32:20,412 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2020-10-13 10:32:20,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:32:20,413 INFO L225 Difference]: With dead ends: 211 [2020-10-13 10:32:20,414 INFO L226 Difference]: Without dead ends: 192 [2020-10-13 10:32:20,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:32:20,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-13 10:32:20,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 184. [2020-10-13 10:32:20,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-13 10:32:20,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 219 transitions. [2020-10-13 10:32:20,426 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 219 transitions. Word has length 57 [2020-10-13 10:32:20,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:32:20,426 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 219 transitions. [2020-10-13 10:32:20,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:32:20,427 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 219 transitions. [2020-10-13 10:32:20,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 10:32:20,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:32:20,428 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 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, 1, 1] [2020-10-13 10:32:20,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 10:32:20,428 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:32:20,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:32:20,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1877726985, now seen corresponding path program 8 times [2020-10-13 10:32:20,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:32:20,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858151619] [2020-10-13 10:32:20,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:32:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:20,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:20,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:21,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:21,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 10:32:21,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:32:21,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1099 [2020-10-13 10:32:21,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:21,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:32:21,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:32:21,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 10:32:21,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:21,883 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-13 10:32:22,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:32:22,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:22,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:22,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:22,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:32:22,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:22,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:32:22,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:22,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:32:22,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:32:22,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:32:22,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:22,273 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:32:22,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858151619] [2020-10-13 10:32:22,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:32:22,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:32:22,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940044974] [2020-10-13 10:32:22,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:32:22,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:32:22,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:32:22,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:32:22,274 INFO L87 Difference]: Start difference. First operand 184 states and 219 transitions. Second operand 18 states. [2020-10-13 10:32:23,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:32:23,919 INFO L93 Difference]: Finished difference Result 213 states and 249 transitions. [2020-10-13 10:32:23,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:32:23,920 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-10-13 10:32:23,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:32:23,922 INFO L225 Difference]: With dead ends: 213 [2020-10-13 10:32:23,922 INFO L226 Difference]: Without dead ends: 194 [2020-10-13 10:32:23,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:32:23,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-13 10:32:23,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 184. [2020-10-13 10:32:23,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-13 10:32:23,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 218 transitions. [2020-10-13 10:32:23,933 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 218 transitions. Word has length 57 [2020-10-13 10:32:23,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:32:23,933 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 218 transitions. [2020-10-13 10:32:23,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:32:23,933 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 218 transitions. [2020-10-13 10:32:23,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 10:32:23,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:32:23,934 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:32:23,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 10:32:23,934 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:32:23,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:32:23,934 INFO L82 PathProgramCache]: Analyzing trace with hash 2113220535, now seen corresponding path program 7 times [2020-10-13 10:32:23,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:32:23,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244241752] [2020-10-13 10:32:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:32:23,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:23,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:24,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:24,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 10:32:24,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:24,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 376 [2020-10-13 10:32:24,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:24,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:32:24,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:32:24,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 10:32:24,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:25,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:32:25,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:25,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:25,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:25,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:32:25,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:25,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:32:25,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:25,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:32:25,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:32:25,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:32:25,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:32:25,183 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:32:25,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244241752] [2020-10-13 10:32:25,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:32:25,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:32:25,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865855161] [2020-10-13 10:32:25,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:32:25,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:32:25,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:32:25,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:32:25,185 INFO L87 Difference]: Start difference. First operand 184 states and 218 transitions. Second operand 19 states. [2020-10-13 10:32:26,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:32:26,731 INFO L93 Difference]: Finished difference Result 210 states and 245 transitions. [2020-10-13 10:32:26,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:32:26,731 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 57 [2020-10-13 10:32:26,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:32:26,733 INFO L225 Difference]: With dead ends: 210 [2020-10-13 10:32:26,733 INFO L226 Difference]: Without dead ends: 191 [2020-10-13 10:32:26,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:32:26,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-13 10:32:26,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 179. [2020-10-13 10:32:26,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-13 10:32:26,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 212 transitions. [2020-10-13 10:32:26,741 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 212 transitions. Word has length 57 [2020-10-13 10:32:26,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:32:26,742 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 212 transitions. [2020-10-13 10:32:26,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:32:26,742 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 212 transitions. [2020-10-13 10:32:26,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 10:32:26,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:32:26,742 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 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, 1, 1] [2020-10-13 10:32:26,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 10:32:26,743 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:32:26,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:32:26,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1603317480, now seen corresponding path program 9 times [2020-10-13 10:32:26,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:32:26,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045185244] [2020-10-13 10:32:26,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:32:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:26,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:27,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:27,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 10:32:27,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:27,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 512 [2020-10-13 10:32:27,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:27,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:32:27,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:32:27,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 10:32:27,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:28,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:32:28,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:28,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:28,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:28,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:32:28,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:28,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:32:28,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:28,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:32:28,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:32:28,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:32:28,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:28,297 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:32:28,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045185244] [2020-10-13 10:32:28,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:32:28,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:32:28,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672268831] [2020-10-13 10:32:28,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:32:28,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:32:28,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:32:28,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:32:28,299 INFO L87 Difference]: Start difference. First operand 179 states and 212 transitions. Second operand 20 states. [2020-10-13 10:32:29,726 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2020-10-13 10:32:30,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:32:30,153 INFO L93 Difference]: Finished difference Result 187 states and 221 transitions. [2020-10-13 10:32:30,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:32:30,154 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 57 [2020-10-13 10:32:30,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:32:30,155 INFO L225 Difference]: With dead ends: 187 [2020-10-13 10:32:30,155 INFO L226 Difference]: Without dead ends: 181 [2020-10-13 10:32:30,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:32:30,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-13 10:32:30,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2020-10-13 10:32:30,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-13 10:32:30,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 214 transitions. [2020-10-13 10:32:30,166 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 214 transitions. Word has length 57 [2020-10-13 10:32:30,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:32:30,166 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 214 transitions. [2020-10-13 10:32:30,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:32:30,167 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 214 transitions. [2020-10-13 10:32:30,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 10:32:30,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:32:30,168 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:32:30,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 10:32:30,168 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:32:30,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:32:30,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1627527427, now seen corresponding path program 15 times [2020-10-13 10:32:30,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:32:30,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277872568] [2020-10-13 10:32:30,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:32:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:30,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:30,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:30,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 10:32:30,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:30,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 600 [2020-10-13 10:32:30,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:30,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:32:30,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:32:30,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 10:32:30,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:31,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:32:31,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:31,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:31,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:31,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:32:31,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:31,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:32:31,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:31,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:32:31,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:32:31,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:32:31,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:31,612 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:32:31,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277872568] [2020-10-13 10:32:31,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:32:31,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:32:31,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857630759] [2020-10-13 10:32:31,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:32:31,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:32:31,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:32:31,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:32:31,613 INFO L87 Difference]: Start difference. First operand 181 states and 214 transitions. Second operand 21 states. [2020-10-13 10:32:32,576 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-13 10:32:32,760 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-13 10:32:33,107 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2020-10-13 10:32:33,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:32:33,777 INFO L93 Difference]: Finished difference Result 262 states and 303 transitions. [2020-10-13 10:32:33,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:32:33,778 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-10-13 10:32:33,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:32:33,780 INFO L225 Difference]: With dead ends: 262 [2020-10-13 10:32:33,780 INFO L226 Difference]: Without dead ends: 258 [2020-10-13 10:32:33,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:32:33,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-13 10:32:33,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 222. [2020-10-13 10:32:33,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-13 10:32:33,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 261 transitions. [2020-10-13 10:32:33,794 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 261 transitions. Word has length 59 [2020-10-13 10:32:33,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:32:33,795 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 261 transitions. [2020-10-13 10:32:33,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:32:33,795 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 261 transitions. [2020-10-13 10:32:33,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 10:32:33,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:32:33,796 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:32:33,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 10:32:33,796 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:32:33,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:32:33,797 INFO L82 PathProgramCache]: Analyzing trace with hash 437179075, now seen corresponding path program 8 times [2020-10-13 10:32:33,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:32:33,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307532546] [2020-10-13 10:32:33,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:32:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:33,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:34,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:34,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 10:32:34,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:34,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 510 [2020-10-13 10:32:34,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:34,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:32:34,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:32:34,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 10:32:34,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:34,921 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-10-13 10:32:35,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:32:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:35,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:35,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:35,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:32:35,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:35,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:32:35,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:35,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:32:35,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:32:35,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:32:35,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:35,434 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:32:35,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307532546] [2020-10-13 10:32:35,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:32:35,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:32:35,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37740859] [2020-10-13 10:32:35,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:32:35,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:32:35,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:32:35,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:32:35,435 INFO L87 Difference]: Start difference. First operand 222 states and 261 transitions. Second operand 21 states. [2020-10-13 10:32:37,066 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2020-10-13 10:32:37,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:32:37,740 INFO L93 Difference]: Finished difference Result 257 states and 299 transitions. [2020-10-13 10:32:37,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:32:37,740 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-10-13 10:32:37,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:32:37,742 INFO L225 Difference]: With dead ends: 257 [2020-10-13 10:32:37,742 INFO L226 Difference]: Without dead ends: 251 [2020-10-13 10:32:37,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:32:37,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-13 10:32:37,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 231. [2020-10-13 10:32:37,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-13 10:32:37,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 272 transitions. [2020-10-13 10:32:37,757 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 272 transitions. Word has length 59 [2020-10-13 10:32:37,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:32:37,757 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 272 transitions. [2020-10-13 10:32:37,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:32:37,757 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 272 transitions. [2020-10-13 10:32:37,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 10:32:37,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:32:37,758 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:32:37,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 10:32:37,759 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:32:37,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:32:37,759 INFO L82 PathProgramCache]: Analyzing trace with hash 734441822, now seen corresponding path program 16 times [2020-10-13 10:32:37,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:32:37,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338994152] [2020-10-13 10:32:37,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:32:37,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:37,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:38,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:38,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 10:32:38,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:38,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 662 [2020-10-13 10:32:38,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:38,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:32:38,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:32:38,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 10:32:38,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:38,980 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-13 10:32:39,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:32:39,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:39,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:39,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:39,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:32:39,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:39,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:32:39,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:39,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:32:39,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:32:39,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:32:39,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:39,602 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:32:39,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338994152] [2020-10-13 10:32:39,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:32:39,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:32:39,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468577772] [2020-10-13 10:32:39,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:32:39,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:32:39,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:32:39,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:32:39,604 INFO L87 Difference]: Start difference. First operand 231 states and 272 transitions. Second operand 22 states. [2020-10-13 10:32:40,416 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-10-13 10:32:40,776 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2020-10-13 10:32:41,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:32:41,649 INFO L93 Difference]: Finished difference Result 283 states and 327 transitions. [2020-10-13 10:32:41,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:32:41,649 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2020-10-13 10:32:41,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:32:41,651 INFO L225 Difference]: With dead ends: 283 [2020-10-13 10:32:41,651 INFO L226 Difference]: Without dead ends: 279 [2020-10-13 10:32:41,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:32:41,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-13 10:32:41,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 245. [2020-10-13 10:32:41,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-13 10:32:41,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 287 transitions. [2020-10-13 10:32:41,669 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 287 transitions. Word has length 61 [2020-10-13 10:32:41,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:32:41,669 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 287 transitions. [2020-10-13 10:32:41,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:32:41,669 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 287 transitions. [2020-10-13 10:32:41,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 10:32:41,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:32:41,671 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:32:41,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 10:32:41,671 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:32:41,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:32:41,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1472634617, now seen corresponding path program 17 times [2020-10-13 10:32:41,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:32:41,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424742912] [2020-10-13 10:32:41,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:32:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:41,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:42,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:42,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 10:32:42,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:42,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 593 [2020-10-13 10:32:42,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:42,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:32:42,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:32:42,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 10:32:42,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:42,979 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-10-13 10:32:43,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:32:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:43,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:43,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:43,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:32:43,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:43,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:32:43,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:43,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:32:43,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:32:43,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:32:43,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:43,583 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:32:43,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424742912] [2020-10-13 10:32:43,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:32:43,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:32:43,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838915303] [2020-10-13 10:32:43,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:32:43,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:32:43,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:32:43,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:32:43,584 INFO L87 Difference]: Start difference. First operand 245 states and 287 transitions. Second operand 22 states. [2020-10-13 10:32:44,473 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2020-10-13 10:32:45,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:32:45,359 INFO L93 Difference]: Finished difference Result 285 states and 329 transitions. [2020-10-13 10:32:45,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:32:45,360 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 63 [2020-10-13 10:32:45,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:32:45,362 INFO L225 Difference]: With dead ends: 285 [2020-10-13 10:32:45,362 INFO L226 Difference]: Without dead ends: 259 [2020-10-13 10:32:45,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:32:45,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-13 10:32:45,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 210. [2020-10-13 10:32:45,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-13 10:32:45,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 247 transitions. [2020-10-13 10:32:45,375 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 247 transitions. Word has length 63 [2020-10-13 10:32:45,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:32:45,375 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 247 transitions. [2020-10-13 10:32:45,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:32:45,375 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 247 transitions. [2020-10-13 10:32:45,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 10:32:45,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:32:45,376 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:32:45,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 10:32:45,376 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:32:45,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:32:45,377 INFO L82 PathProgramCache]: Analyzing trace with hash -563344918, now seen corresponding path program 18 times [2020-10-13 10:32:45,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:32:45,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289759134] [2020-10-13 10:32:45,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:32:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:45,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:46,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:46,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 10:32:46,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:46,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 711 [2020-10-13 10:32:46,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:46,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:32:46,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:32:46,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 10:32:46,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:46,900 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-10-13 10:32:47,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:32:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:47,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:47,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:47,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:32:47,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:47,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:32:47,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:47,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:32:47,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:32:47,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:32:47,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:47,408 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:32:47,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289759134] [2020-10-13 10:32:47,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:32:47,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:32:47,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730301296] [2020-10-13 10:32:47,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:32:47,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:32:47,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:32:47,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:32:47,409 INFO L87 Difference]: Start difference. First operand 210 states and 247 transitions. Second operand 23 states. [2020-10-13 10:32:48,991 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-13 10:32:49,207 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 83 [2020-10-13 10:32:49,408 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 86 [2020-10-13 10:32:49,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:32:49,957 INFO L93 Difference]: Finished difference Result 246 states and 286 transitions. [2020-10-13 10:32:49,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:32:49,957 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 63 [2020-10-13 10:32:49,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:32:49,959 INFO L225 Difference]: With dead ends: 246 [2020-10-13 10:32:49,959 INFO L226 Difference]: Without dead ends: 242 [2020-10-13 10:32:49,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=155, Invalid=1405, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:32:49,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-13 10:32:49,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 229. [2020-10-13 10:32:49,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-13 10:32:49,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 269 transitions. [2020-10-13 10:32:49,975 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 269 transitions. Word has length 63 [2020-10-13 10:32:49,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:32:49,976 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 269 transitions. [2020-10-13 10:32:49,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:32:49,976 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 269 transitions. [2020-10-13 10:32:49,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 10:32:49,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:32:49,977 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:32:49,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 10:32:49,977 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:32:49,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:32:49,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1262389369, now seen corresponding path program 10 times [2020-10-13 10:32:49,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:32:49,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648505496] [2020-10-13 10:32:49,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:32:50,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:50,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:50,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:50,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:50,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:52,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:52,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 10:32:52,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:32:52,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2590 [2020-10-13 10:32:52,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:52,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:32:52,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:32:52,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 10:32:52,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:53,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:32:53,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:53,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:53,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:53,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:32:53,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:53,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:32:53,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:53,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:32:53,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:32:53,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:32:53,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:53,526 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 32 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-13 10:32:53,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648505496] [2020-10-13 10:32:53,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:32:53,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:32:53,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848448428] [2020-10-13 10:32:53,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:32:53,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:32:53,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:32:53,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:32:53,528 INFO L87 Difference]: Start difference. First operand 229 states and 269 transitions. Second operand 19 states. [2020-10-13 10:32:54,511 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2020-10-13 10:32:54,696 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2020-10-13 10:32:55,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:32:55,030 INFO L93 Difference]: Finished difference Result 260 states and 303 transitions. [2020-10-13 10:32:55,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:32:55,031 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 63 [2020-10-13 10:32:55,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:32:55,033 INFO L225 Difference]: With dead ends: 260 [2020-10-13 10:32:55,033 INFO L226 Difference]: Without dead ends: 231 [2020-10-13 10:32:55,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:32:55,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-13 10:32:55,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 229. [2020-10-13 10:32:55,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-13 10:32:55,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 267 transitions. [2020-10-13 10:32:55,048 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 267 transitions. Word has length 63 [2020-10-13 10:32:55,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:32:55,048 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 267 transitions. [2020-10-13 10:32:55,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:32:55,049 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 267 transitions. [2020-10-13 10:32:55,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 10:32:55,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:32:55,050 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:32:55,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 10:32:55,050 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:32:55,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:32:55,050 INFO L82 PathProgramCache]: Analyzing trace with hash 462823225, now seen corresponding path program 11 times [2020-10-13 10:32:55,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:32:55,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154176356] [2020-10-13 10:32:55,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:32:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:55,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:55,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:55,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:57,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:57,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 10:32:57,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:32:57,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1931 [2020-10-13 10:32:57,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:57,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:32:57,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:32:57,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 10:32:57,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:57,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:32:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:57,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:57,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:57,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:32:57,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:57,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:32:57,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:57,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:32:57,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:32:57,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:32:57,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:57,953 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 10:32:57,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154176356] [2020-10-13 10:32:57,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:32:57,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:32:57,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184950381] [2020-10-13 10:32:57,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:32:57,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:32:57,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:32:57,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:32:57,955 INFO L87 Difference]: Start difference. First operand 229 states and 267 transitions. Second operand 20 states. [2020-10-13 10:32:58,812 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2020-10-13 10:32:59,025 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2020-10-13 10:32:59,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:32:59,486 INFO L93 Difference]: Finished difference Result 260 states and 299 transitions. [2020-10-13 10:32:59,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:32:59,487 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 63 [2020-10-13 10:32:59,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:32:59,488 INFO L225 Difference]: With dead ends: 260 [2020-10-13 10:32:59,489 INFO L226 Difference]: Without dead ends: 239 [2020-10-13 10:32:59,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:32:59,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-13 10:32:59,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 229. [2020-10-13 10:32:59,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-13 10:32:59,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 266 transitions. [2020-10-13 10:32:59,504 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 266 transitions. Word has length 63 [2020-10-13 10:32:59,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:32:59,505 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 266 transitions. [2020-10-13 10:32:59,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:32:59,505 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 266 transitions. [2020-10-13 10:32:59,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 10:32:59,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:32:59,506 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 5, 4, 4, 4, 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 10:32:59,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 10:32:59,506 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:32:59,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:32:59,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1858541049, now seen corresponding path program 12 times [2020-10-13 10:32:59,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:32:59,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564554445] [2020-10-13 10:32:59,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:32:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:59,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:59,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:00,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:00,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 10:33:00,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:33:00,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1040 [2020-10-13 10:33:00,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:00,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:33:00,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:33:00,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 10:33:00,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:01,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:01,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:01,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:01,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:01,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:01,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:33:01,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:01,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:01,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:01,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:01,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:01,801 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:33:01,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564554445] [2020-10-13 10:33:01,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:01,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:33:01,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589220262] [2020-10-13 10:33:01,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:33:01,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:01,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:33:01,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:33:01,802 INFO L87 Difference]: Start difference. First operand 229 states and 266 transitions. Second operand 21 states. [2020-10-13 10:33:03,302 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2020-10-13 10:33:03,498 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2020-10-13 10:33:03,840 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 71 [2020-10-13 10:33:04,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:04,468 INFO L93 Difference]: Finished difference Result 262 states and 300 transitions. [2020-10-13 10:33:04,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:33:04,469 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 63 [2020-10-13 10:33:04,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:04,471 INFO L225 Difference]: With dead ends: 262 [2020-10-13 10:33:04,471 INFO L226 Difference]: Without dead ends: 241 [2020-10-13 10:33:04,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=150, Invalid=1410, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:33:04,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-13 10:33:04,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 229. [2020-10-13 10:33:04,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-13 10:33:04,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 265 transitions. [2020-10-13 10:33:04,486 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 265 transitions. Word has length 63 [2020-10-13 10:33:04,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:04,486 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 265 transitions. [2020-10-13 10:33:04,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:33:04,486 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 265 transitions. [2020-10-13 10:33:04,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 10:33:04,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:04,487 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:33:04,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 10:33:04,487 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:04,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:04,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1753312441, now seen corresponding path program 9 times [2020-10-13 10:33:04,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:04,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100635681] [2020-10-13 10:33:04,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:04,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:04,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:05,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:05,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 10:33:05,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:05,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 685 [2020-10-13 10:33:05,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:05,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:33:05,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:33:05,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 10:33:05,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:06,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:06,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:06,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:06,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:06,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:06,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:06,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:33:06,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:06,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:06,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:06,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:06,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:06,519 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:33:06,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100635681] [2020-10-13 10:33:06,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:06,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:33:06,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014955295] [2020-10-13 10:33:06,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:33:06,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:06,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:33:06,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:33:06,520 INFO L87 Difference]: Start difference. First operand 229 states and 265 transitions. Second operand 22 states. [2020-10-13 10:33:07,903 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2020-10-13 10:33:08,276 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-10-13 10:33:09,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:09,104 INFO L93 Difference]: Finished difference Result 259 states and 296 transitions. [2020-10-13 10:33:09,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:33:09,104 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 63 [2020-10-13 10:33:09,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:09,106 INFO L225 Difference]: With dead ends: 259 [2020-10-13 10:33:09,106 INFO L226 Difference]: Without dead ends: 238 [2020-10-13 10:33:09,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:33:09,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-13 10:33:09,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 224. [2020-10-13 10:33:09,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-13 10:33:09,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 259 transitions. [2020-10-13 10:33:09,118 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 259 transitions. Word has length 63 [2020-10-13 10:33:09,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:09,118 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 259 transitions. [2020-10-13 10:33:09,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:33:09,118 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 259 transitions. [2020-10-13 10:33:09,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 10:33:09,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:09,119 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 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 10:33:09,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 10:33:09,120 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:09,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:09,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1362748330, now seen corresponding path program 13 times [2020-10-13 10:33:09,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:09,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760711641] [2020-10-13 10:33:09,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:09,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:09,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:09,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 10:33:09,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:09,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 791 [2020-10-13 10:33:09,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:09,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:33:09,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:33:09,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 10:33:09,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:10,739 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-10-13 10:33:11,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:11,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:11,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:11,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:11,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:11,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:11,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:33:11,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:11,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:11,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:11,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:11,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:11,308 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:33:11,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760711641] [2020-10-13 10:33:11,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:11,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:33:11,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781049749] [2020-10-13 10:33:11,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:33:11,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:11,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:33:11,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:33:11,309 INFO L87 Difference]: Start difference. First operand 224 states and 259 transitions. Second operand 23 states. [2020-10-13 10:33:13,529 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2020-10-13 10:33:13,782 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 82 [2020-10-13 10:33:14,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:14,347 INFO L93 Difference]: Finished difference Result 232 states and 268 transitions. [2020-10-13 10:33:14,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:33:14,348 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 63 [2020-10-13 10:33:14,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:14,350 INFO L225 Difference]: With dead ends: 232 [2020-10-13 10:33:14,350 INFO L226 Difference]: Without dead ends: 226 [2020-10-13 10:33:14,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=169, Invalid=1637, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 10:33:14,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-13 10:33:14,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2020-10-13 10:33:14,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-13 10:33:14,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 261 transitions. [2020-10-13 10:33:14,364 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 261 transitions. Word has length 63 [2020-10-13 10:33:14,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:14,364 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 261 transitions. [2020-10-13 10:33:14,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:33:14,365 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 261 transitions. [2020-10-13 10:33:14,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 10:33:14,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:14,366 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:33:14,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 10:33:14,366 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:14,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:14,366 INFO L82 PathProgramCache]: Analyzing trace with hash -159906683, now seen corresponding path program 19 times [2020-10-13 10:33:14,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:14,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375252375] [2020-10-13 10:33:14,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:14,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:15,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:15,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 10:33:15,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:15,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 831 [2020-10-13 10:33:15,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:15,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:33:15,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:33:15,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 10:33:15,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:15,856 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-13 10:33:16,245 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2020-10-13 10:33:16,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:16,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:16,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:16,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:16,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:16,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:33:16,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:16,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:16,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:16,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:16,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:16,955 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:33:16,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375252375] [2020-10-13 10:33:16,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:16,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:33:16,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849524179] [2020-10-13 10:33:16,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:33:16,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:16,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:33:16,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:33:16,956 INFO L87 Difference]: Start difference. First operand 226 states and 261 transitions. Second operand 24 states. [2020-10-13 10:33:18,647 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-13 10:33:18,989 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-13 10:33:19,201 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-13 10:33:19,653 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 95 [2020-10-13 10:33:20,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:20,597 INFO L93 Difference]: Finished difference Result 328 states and 372 transitions. [2020-10-13 10:33:20,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 10:33:20,598 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2020-10-13 10:33:20,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:20,601 INFO L225 Difference]: With dead ends: 328 [2020-10-13 10:33:20,601 INFO L226 Difference]: Without dead ends: 324 [2020-10-13 10:33:20,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=184, Invalid=1978, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 10:33:20,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-10-13 10:33:20,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 276. [2020-10-13 10:33:20,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-13 10:33:20,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 318 transitions. [2020-10-13 10:33:20,621 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 318 transitions. Word has length 65 [2020-10-13 10:33:20,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:20,621 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 318 transitions. [2020-10-13 10:33:20,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:33:20,621 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 318 transitions. [2020-10-13 10:33:20,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 10:33:20,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:20,622 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:33:20,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 10:33:20,622 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:20,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:20,623 INFO L82 PathProgramCache]: Analyzing trace with hash 405483269, now seen corresponding path program 10 times [2020-10-13 10:33:20,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:20,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620898780] [2020-10-13 10:33:20,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:20,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:20,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:21,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:21,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 10:33:21,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:21,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 766 [2020-10-13 10:33:21,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:21,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:33:21,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:33:21,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 10:33:21,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:21,734 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-10-13 10:33:22,126 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2020-10-13 10:33:22,406 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2020-10-13 10:33:23,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:23,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:23,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:23,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:23,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:23,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:23,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:33:23,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:23,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:23,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:23,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:23,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:23,095 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:33:23,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620898780] [2020-10-13 10:33:23,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:23,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:33:23,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107932035] [2020-10-13 10:33:23,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:33:23,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:23,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:33:23,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:33:23,097 INFO L87 Difference]: Start difference. First operand 276 states and 318 transitions. Second operand 24 states. [2020-10-13 10:33:24,435 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-13 10:33:24,615 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-13 10:33:24,963 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-13 10:33:25,152 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-13 10:33:25,583 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 94 [2020-10-13 10:33:26,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:26,467 INFO L93 Difference]: Finished difference Result 315 states and 360 transitions. [2020-10-13 10:33:26,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 10:33:26,467 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2020-10-13 10:33:26,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:26,469 INFO L225 Difference]: With dead ends: 315 [2020-10-13 10:33:26,469 INFO L226 Difference]: Without dead ends: 309 [2020-10-13 10:33:26,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 10:33:26,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-13 10:33:26,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 285. [2020-10-13 10:33:26,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-10-13 10:33:26,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 329 transitions. [2020-10-13 10:33:26,488 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 329 transitions. Word has length 65 [2020-10-13 10:33:26,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:26,488 INFO L479 AbstractCegarLoop]: Abstraction has 285 states and 329 transitions. [2020-10-13 10:33:26,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:33:26,488 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 329 transitions. [2020-10-13 10:33:26,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 10:33:26,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:26,489 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:33:26,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-13 10:33:26,490 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:26,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:26,490 INFO L82 PathProgramCache]: Analyzing trace with hash 997180512, now seen corresponding path program 20 times [2020-10-13 10:33:26,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:26,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833799445] [2020-10-13 10:33:26,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:26,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:26,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:27,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:27,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 10:33:27,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:27,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 906 [2020-10-13 10:33:27,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:27,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:33:27,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:33:27,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 10:33:27,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:27,905 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-13 10:33:28,189 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-13 10:33:28,489 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2020-10-13 10:33:28,722 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-10-13 10:33:28,986 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-13 10:33:29,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:29,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:29,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:29,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:29,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:29,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:29,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:33:29,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:29,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:29,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:29,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:29,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:29,756 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:33:29,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833799445] [2020-10-13 10:33:29,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:29,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:33:29,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321311047] [2020-10-13 10:33:29,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:33:29,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:29,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:33:29,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:33:29,757 INFO L87 Difference]: Start difference. First operand 285 states and 329 transitions. Second operand 25 states. [2020-10-13 10:33:30,587 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-13 10:33:30,948 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-13 10:33:31,406 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2020-10-13 10:33:31,623 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-13 10:33:31,933 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 85 [2020-10-13 10:33:33,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:33,166 INFO L93 Difference]: Finished difference Result 351 states and 398 transitions. [2020-10-13 10:33:33,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:33:33,166 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 67 [2020-10-13 10:33:33,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:33,168 INFO L225 Difference]: With dead ends: 351 [2020-10-13 10:33:33,169 INFO L226 Difference]: Without dead ends: 347 [2020-10-13 10:33:33,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=130, Invalid=1510, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:33:33,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-13 10:33:33,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 303. [2020-10-13 10:33:33,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-10-13 10:33:33,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 348 transitions. [2020-10-13 10:33:33,195 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 348 transitions. Word has length 67 [2020-10-13 10:33:33,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:33,196 INFO L479 AbstractCegarLoop]: Abstraction has 303 states and 348 transitions. [2020-10-13 10:33:33,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:33:33,196 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 348 transitions. [2020-10-13 10:33:33,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 10:33:33,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:33,197 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:33:33,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-13 10:33:33,197 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:33,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:33,197 INFO L82 PathProgramCache]: Analyzing trace with hash 561445243, now seen corresponding path program 21 times [2020-10-13 10:33:33,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:33,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036387497] [2020-10-13 10:33:33,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:33,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:34,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:34,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 10:33:34,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:34,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 889 [2020-10-13 10:33:34,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:34,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:33:34,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:33:34,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 10:33:34,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:34,654 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-13 10:33:34,864 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-10-13 10:33:35,156 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2020-10-13 10:33:35,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:35,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:35,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:35,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:35,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:35,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:35,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:33:35,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:35,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:35,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:35,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:35,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:35,999 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 14 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:33:35,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036387497] [2020-10-13 10:33:35,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:35,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:33:36,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292103798] [2020-10-13 10:33:36,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:33:36,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:36,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:33:36,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:33:36,000 INFO L87 Difference]: Start difference. First operand 303 states and 348 transitions. Second operand 25 states. [2020-10-13 10:33:37,313 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 78 [2020-10-13 10:33:38,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:38,460 INFO L93 Difference]: Finished difference Result 353 states and 400 transitions. [2020-10-13 10:33:38,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:33:38,460 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 69 [2020-10-13 10:33:38,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:38,463 INFO L225 Difference]: With dead ends: 353 [2020-10-13 10:33:38,463 INFO L226 Difference]: Without dead ends: 318 [2020-10-13 10:33:38,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=107, Invalid=1083, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:33:38,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-13 10:33:38,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 259. [2020-10-13 10:33:38,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-13 10:33:38,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 298 transitions. [2020-10-13 10:33:38,481 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 298 transitions. Word has length 69 [2020-10-13 10:33:38,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:38,481 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 298 transitions. [2020-10-13 10:33:38,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:33:38,481 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 298 transitions. [2020-10-13 10:33:38,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 10:33:38,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:38,482 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:33:38,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-13 10:33:38,482 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:38,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:38,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1804768212, now seen corresponding path program 22 times [2020-10-13 10:33:38,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:38,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739604782] [2020-10-13 10:33:38,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:38,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:39,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:39,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 10:33:39,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:39,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 954 [2020-10-13 10:33:39,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:39,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:33:39,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:33:39,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 10:33:39,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:40,087 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-13 10:33:40,317 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2020-10-13 10:33:40,660 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 88 [2020-10-13 10:33:41,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:41,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:41,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:41,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:41,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:41,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:33:41,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:41,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:41,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:41,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:41,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:33:41,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739604782] [2020-10-13 10:33:41,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:41,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 10:33:41,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578498471] [2020-10-13 10:33:41,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 10:33:41,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:41,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 10:33:41,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:33:41,478 INFO L87 Difference]: Start difference. First operand 259 states and 298 transitions. Second operand 26 states. [2020-10-13 10:33:43,265 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-13 10:33:43,469 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-13 10:33:43,866 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-13 10:33:44,085 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-13 10:33:44,252 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-13 10:33:44,605 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2020-10-13 10:33:44,930 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 98 [2020-10-13 10:33:45,219 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 101 [2020-10-13 10:33:46,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:46,116 INFO L93 Difference]: Finished difference Result 299 states and 341 transitions. [2020-10-13 10:33:46,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 10:33:46,117 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 69 [2020-10-13 10:33:46,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:46,118 INFO L225 Difference]: With dead ends: 299 [2020-10-13 10:33:46,119 INFO L226 Difference]: Without dead ends: 295 [2020-10-13 10:33:46,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=195, Invalid=2157, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 10:33:46,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-13 10:33:46,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 280. [2020-10-13 10:33:46,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-13 10:33:46,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 322 transitions. [2020-10-13 10:33:46,141 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 322 transitions. Word has length 69 [2020-10-13 10:33:46,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:46,141 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 322 transitions. [2020-10-13 10:33:46,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 10:33:46,142 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 322 transitions. [2020-10-13 10:33:46,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 10:33:46,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:46,143 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:33:46,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-13 10:33:46,143 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:46,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:46,143 INFO L82 PathProgramCache]: Analyzing trace with hash 882312123, now seen corresponding path program 14 times [2020-10-13 10:33:46,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:46,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863581533] [2020-10-13 10:33:46,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:46,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:46,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:46,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:46,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:47,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:49,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:49,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 10:33:49,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:33:49,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3399 [2020-10-13 10:33:49,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:49,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:33:49,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:33:49,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 10:33:49,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:50,062 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-10-13 10:33:50,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:50,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:50,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:50,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:50,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:50,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:50,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:33:50,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:50,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:50,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:50,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:50,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 32 proven. 48 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-13 10:33:50,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863581533] [2020-10-13 10:33:50,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:50,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:33:50,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052618413] [2020-10-13 10:33:50,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:33:50,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:50,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:33:50,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:33:50,694 INFO L87 Difference]: Start difference. First operand 280 states and 322 transitions. Second operand 22 states. [2020-10-13 10:33:51,707 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2020-10-13 10:33:51,917 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 80 [2020-10-13 10:33:52,160 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 74 [2020-10-13 10:33:52,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:52,642 INFO L93 Difference]: Finished difference Result 313 states and 358 transitions. [2020-10-13 10:33:52,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:33:52,643 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 69 [2020-10-13 10:33:52,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:52,645 INFO L225 Difference]: With dead ends: 313 [2020-10-13 10:33:52,645 INFO L226 Difference]: Without dead ends: 282 [2020-10-13 10:33:52,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:33:52,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-13 10:33:52,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-10-13 10:33:52,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-13 10:33:52,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 320 transitions. [2020-10-13 10:33:52,662 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 320 transitions. Word has length 69 [2020-10-13 10:33:52,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:52,662 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 320 transitions. [2020-10-13 10:33:52,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:33:52,663 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 320 transitions. [2020-10-13 10:33:52,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 10:33:52,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:52,663 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:33:52,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-13 10:33:52,664 INFO L427 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:52,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:52,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1298393723, now seen corresponding path program 15 times [2020-10-13 10:33:52,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:52,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404616590] [2020-10-13 10:33:52,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:52,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:52,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:53,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:53,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:55,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:55,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 10:33:55,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:33:55,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2815 [2020-10-13 10:33:55,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:55,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:33:55,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:33:55,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 10:33:55,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:56,108 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-13 10:33:56,311 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-10-13 10:33:56,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:56,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:56,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:56,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:56,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:56,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:56,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:33:56,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:56,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:56,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:56,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:56,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:56,949 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 30 proven. 60 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 10:33:56,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404616590] [2020-10-13 10:33:56,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:56,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:33:56,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038414443] [2020-10-13 10:33:56,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:33:56,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:56,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:33:56,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:33:56,950 INFO L87 Difference]: Start difference. First operand 280 states and 320 transitions. Second operand 23 states. [2020-10-13 10:33:58,197 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 70 [2020-10-13 10:33:58,596 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 92 [2020-10-13 10:33:59,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:59,234 INFO L93 Difference]: Finished difference Result 315 states and 356 transitions. [2020-10-13 10:33:59,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:33:59,235 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2020-10-13 10:33:59,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:59,237 INFO L225 Difference]: With dead ends: 315 [2020-10-13 10:33:59,237 INFO L226 Difference]: Without dead ends: 292 [2020-10-13 10:33:59,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:33:59,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-13 10:33:59,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 280. [2020-10-13 10:33:59,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-13 10:33:59,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 319 transitions. [2020-10-13 10:33:59,254 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 319 transitions. Word has length 69 [2020-10-13 10:33:59,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:59,254 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 319 transitions. [2020-10-13 10:33:59,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:33:59,255 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 319 transitions. [2020-10-13 10:33:59,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 10:33:59,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:59,256 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 6, 5, 5, 5, 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 10:33:59,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-13 10:33:59,256 INFO L427 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:59,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:59,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1741541061, now seen corresponding path program 16 times [2020-10-13 10:33:59,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:59,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791720350] [2020-10-13 10:33:59,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:59,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:59,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:59,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:01,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:34:01,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 10:34:01,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:34:01,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1906 [2020-10-13 10:34:01,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:34:01,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:34:01,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:34:01,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 10:34:01,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:34:01,639 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-10-13 10:34:01,828 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-13 10:34:02,096 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2020-10-13 10:34:02,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:34:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:34:02,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:02,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:34:02,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:34:02,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:34:02,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:34:02,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:34:02,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:34:02,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:34:02,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:34:02,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:34:02,762 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 24 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:34:02,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791720350] [2020-10-13 10:34:02,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:34:02,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:34:02,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38464899] [2020-10-13 10:34:02,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:34:02,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:34:02,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:34:02,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:34:02,764 INFO L87 Difference]: Start difference. First operand 280 states and 319 transitions. Second operand 24 states. [2020-10-13 10:34:04,092 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 68 [2020-10-13 10:34:04,336 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 73 [2020-10-13 10:34:04,799 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 95 [2020-10-13 10:34:05,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:34:05,569 INFO L93 Difference]: Finished difference Result 317 states and 357 transitions. [2020-10-13 10:34:05,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 10:34:05,570 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 69 [2020-10-13 10:34:05,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:34:05,572 INFO L225 Difference]: With dead ends: 317 [2020-10-13 10:34:05,572 INFO L226 Difference]: Without dead ends: 294 [2020-10-13 10:34:05,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=154, Invalid=1486, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:34:05,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-13 10:34:05,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 280. [2020-10-13 10:34:05,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-13 10:34:05,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 318 transitions. [2020-10-13 10:34:05,589 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 318 transitions. Word has length 69 [2020-10-13 10:34:05,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:34:05,589 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 318 transitions. [2020-10-13 10:34:05,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:34:05,589 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 318 transitions. [2020-10-13 10:34:05,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 10:34:05,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:34:05,590 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:34:05,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-13 10:34:05,590 INFO L427 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:34:05,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:34:05,590 INFO L82 PathProgramCache]: Analyzing trace with hash 212981755, now seen corresponding path program 11 times [2020-10-13 10:34:05,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:34:05,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358326612] [2020-10-13 10:34:05,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:34:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:34:05,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:06,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:34:06,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 10:34:06,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:34:06,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1049 [2020-10-13 10:34:06,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:34:06,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:34:06,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:34:06,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 10:34:06,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:34:07,172 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-13 10:34:07,403 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-13 10:34:07,624 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-13 10:34:08,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:34:08,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:34:08,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:08,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:34:08,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:34:08,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:34:08,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:34:08,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:34:08,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:34:08,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:34:08,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:34:08,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:34:08,073 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 14 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:34:08,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358326612] [2020-10-13 10:34:08,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:34:08,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:34:08,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076781431] [2020-10-13 10:34:08,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:34:08,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:34:08,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:34:08,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:34:08,074 INFO L87 Difference]: Start difference. First operand 280 states and 318 transitions. Second operand 25 states. [2020-10-13 10:34:09,394 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 71 [2020-10-13 10:34:09,880 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 78 [2020-10-13 10:34:10,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:34:10,779 INFO L93 Difference]: Finished difference Result 314 states and 353 transitions. [2020-10-13 10:34:10,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:34:10,780 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 69 [2020-10-13 10:34:10,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:34:10,781 INFO L225 Difference]: With dead ends: 314 [2020-10-13 10:34:10,782 INFO L226 Difference]: Without dead ends: 291 [2020-10-13 10:34:10,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:34:10,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-13 10:34:10,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 275. [2020-10-13 10:34:10,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-13 10:34:10,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 312 transitions. [2020-10-13 10:34:10,796 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 312 transitions. Word has length 69 [2020-10-13 10:34:10,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:34:10,796 INFO L479 AbstractCegarLoop]: Abstraction has 275 states and 312 transitions. [2020-10-13 10:34:10,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:34:10,796 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 312 transitions. [2020-10-13 10:34:10,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 10:34:10,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:34:10,797 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 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 10:34:10,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-13 10:34:10,797 INFO L427 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:34:10,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:34:10,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1456974164, now seen corresponding path program 17 times [2020-10-13 10:34:10,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:34:10,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43675459] [2020-10-13 10:34:10,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:34:10,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:34:10,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:11,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:34:11,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 10:34:11,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:34:11,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 913 [2020-10-13 10:34:11,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:34:11,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:34:11,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:34:11,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 10:34:11,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:34:12,062 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-10-13 10:34:12,559 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-13 10:34:12,846 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2020-10-13 10:34:13,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:34:13,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:34:13,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:13,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:34:13,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:34:13,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:34:13,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:34:13,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:34:13,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:34:13,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:34:13,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:34:13,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:34:13,443 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:34:13,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43675459] [2020-10-13 10:34:13,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:34:13,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 10:34:13,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099922043] [2020-10-13 10:34:13,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 10:34:13,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:34:13,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 10:34:13,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:34:13,445 INFO L87 Difference]: Start difference. First operand 275 states and 312 transitions. Second operand 26 states. [2020-10-13 10:34:15,031 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 75 [2020-10-13 10:34:15,337 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 71 [2020-10-13 10:34:16,126 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 101 [2020-10-13 10:34:16,539 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 104 [2020-10-13 10:34:17,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:34:17,366 INFO L93 Difference]: Finished difference Result 283 states and 321 transitions. [2020-10-13 10:34:17,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 10:34:17,367 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 69 [2020-10-13 10:34:17,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:34:17,369 INFO L225 Difference]: With dead ends: 283 [2020-10-13 10:34:17,369 INFO L226 Difference]: Without dead ends: 277 [2020-10-13 10:34:17,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=165, Invalid=1641, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 10:34:17,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-13 10:34:17,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2020-10-13 10:34:17,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-13 10:34:17,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 314 transitions. [2020-10-13 10:34:17,383 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 314 transitions. Word has length 69 [2020-10-13 10:34:17,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:34:17,383 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 314 transitions. [2020-10-13 10:34:17,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 10:34:17,383 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 314 transitions. [2020-10-13 10:34:17,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 10:34:17,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:34:17,384 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:34:17,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-13 10:34:17,384 INFO L427 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:34:17,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:34:17,384 INFO L82 PathProgramCache]: Analyzing trace with hash 833216071, now seen corresponding path program 23 times [2020-10-13 10:34:17,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:34:17,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599410529] [2020-10-13 10:34:17,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:34:17,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:34:17,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:18,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:34:18,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 10:34:18,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:34:18,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1131 [2020-10-13 10:34:18,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:34:18,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 10:34:18,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:34:18,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 10:34:18,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:34:19,342 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-13 10:34:19,626 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-10-13 10:34:19,765 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-13 10:34:19,968 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2020-10-13 10:34:20,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:34:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:34:20,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:20,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:34:20,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:34:20,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:34:20,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:34:20,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:34:20,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:34:20,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:34:20,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:34:20,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:34:20,910 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:34:20,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599410529] [2020-10-13 10:34:20,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:34:20,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:34:20,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923902808] [2020-10-13 10:34:20,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:34:20,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:34:20,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:34:20,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:34:20,912 INFO L87 Difference]: Start difference. First operand 277 states and 314 transitions. Second operand 27 states. [2020-10-13 10:34:22,428 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-13 10:34:22,634 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-13 10:34:23,040 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-13 10:34:23,286 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-13 10:34:23,734 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-13 10:34:23,985 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-13 10:34:24,162 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-13 10:34:24,579 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 109 [2020-10-13 10:34:25,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:34:25,833 INFO L93 Difference]: Finished difference Result 402 states and 449 transitions. [2020-10-13 10:34:25,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 10:34:25,833 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 71 [2020-10-13 10:34:25,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:34:25,836 INFO L225 Difference]: With dead ends: 402 [2020-10-13 10:34:25,836 INFO L226 Difference]: Without dead ends: 398 [2020-10-13 10:34:25,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=204, Invalid=2448, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 10:34:25,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-10-13 10:34:25,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 336. [2020-10-13 10:34:25,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-13 10:34:25,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 381 transitions. [2020-10-13 10:34:25,860 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 381 transitions. Word has length 71 [2020-10-13 10:34:25,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:34:25,861 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 381 transitions. [2020-10-13 10:34:25,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:34:25,861 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 381 transitions. [2020-10-13 10:34:25,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 10:34:25,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:34:25,862 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:34:25,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-13 10:34:25,862 INFO L427 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:34:25,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:34:25,862 INFO L82 PathProgramCache]: Analyzing trace with hash 975321479, now seen corresponding path program 12 times [2020-10-13 10:34:25,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:34:25,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809669625] [2020-10-13 10:34:25,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:34:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:34:26,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:27,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:34:27,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 10:34:27,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:34:27,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1182 [2020-10-13 10:34:27,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:34:27,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 10:34:27,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:34:27,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 10:34:27,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:34:27,875 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-10-13 10:34:28,195 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2020-10-13 10:34:28,371 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2020-10-13 10:34:28,636 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 79 [2020-10-13 10:34:28,836 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-10-13 10:34:29,059 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2020-10-13 10:34:29,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:34:29,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:34:29,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:29,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:34:29,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:34:29,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:34:29,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:34:29,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:34:29,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:34:29,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:34:29,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:34:29,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:34:29,610 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:34:29,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809669625] [2020-10-13 10:34:29,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:34:29,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:34:29,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219888772] [2020-10-13 10:34:29,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:34:29,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:34:29,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:34:29,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:34:29,611 INFO L87 Difference]: Start difference. First operand 336 states and 381 transitions. Second operand 27 states. [2020-10-13 10:34:31,487 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-13 10:34:31,994 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 109 [2020-10-13 10:34:33,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:34:33,188 INFO L93 Difference]: Finished difference Result 379 states and 427 transitions. [2020-10-13 10:34:33,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 10:34:33,188 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 71 [2020-10-13 10:34:33,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:34:33,191 INFO L225 Difference]: With dead ends: 379 [2020-10-13 10:34:33,191 INFO L226 Difference]: Without dead ends: 373 [2020-10-13 10:34:33,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=166, Invalid=1726, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 10:34:33,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-10-13 10:34:33,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 345. [2020-10-13 10:34:33,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-13 10:34:33,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 392 transitions. [2020-10-13 10:34:33,220 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 392 transitions. Word has length 71 [2020-10-13 10:34:33,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:34:33,221 INFO L479 AbstractCegarLoop]: Abstraction has 345 states and 392 transitions. [2020-10-13 10:34:33,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:34:33,221 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 392 transitions. [2020-10-13 10:34:33,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 10:34:33,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:34:33,222 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:34:33,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-13 10:34:33,222 INFO L427 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:34:33,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:34:33,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1905407394, now seen corresponding path program 24 times [2020-10-13 10:34:33,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:34:33,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962393111] [2020-10-13 10:34:33,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:34:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:34:33,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:34,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:34:34,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 10:34:34,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:34:34,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1140 [2020-10-13 10:34:34,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:34:34,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:34:34,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:34:34,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 10:34:34,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:34:34,997 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-10-13 10:34:35,134 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-13 10:34:35,351 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2020-10-13 10:34:35,501 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-10-13 10:34:35,728 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 74 [2020-10-13 10:34:35,914 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2020-10-13 10:34:36,194 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 84 [2020-10-13 10:34:36,407 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 79 [2020-10-13 10:34:36,615 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 64 [2020-10-13 10:34:36,766 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-10-13 10:34:37,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:34:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:34:37,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:37,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:34:37,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:34:37,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:34:37,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:34:37,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:34:37,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:34:37,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:34:37,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:34:37,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:34:37,380 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:34:37,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962393111] [2020-10-13 10:34:37,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:34:37,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:34:37,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379447963] [2020-10-13 10:34:37,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:34:37,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:34:37,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:34:37,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:34:37,381 INFO L87 Difference]: Start difference. First operand 345 states and 392 transitions. Second operand 28 states. [2020-10-13 10:34:39,045 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 93 [2020-10-13 10:34:40,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:34:40,653 INFO L93 Difference]: Finished difference Result 427 states and 477 transitions. [2020-10-13 10:34:40,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:34:40,653 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 73 [2020-10-13 10:34:40,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:34:40,655 INFO L225 Difference]: With dead ends: 427 [2020-10-13 10:34:40,655 INFO L226 Difference]: Without dead ends: 423 [2020-10-13 10:34:40,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:34:40,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-13 10:34:40,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 367. [2020-10-13 10:34:40,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-10-13 10:34:40,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 415 transitions. [2020-10-13 10:34:40,684 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 415 transitions. Word has length 73 [2020-10-13 10:34:40,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:34:40,684 INFO L479 AbstractCegarLoop]: Abstraction has 367 states and 415 transitions. [2020-10-13 10:34:40,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:34:40,684 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 415 transitions. [2020-10-13 10:34:40,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 10:34:40,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:34:40,685 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:34:40,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-13 10:34:40,686 INFO L427 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:34:40,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:34:40,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1489117757, now seen corresponding path program 25 times [2020-10-13 10:34:40,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:34:40,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011979284] [2020-10-13 10:34:40,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:34:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:34:40,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:41,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:34:41,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 10:34:41,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:34:41,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1218 [2020-10-13 10:34:41,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:34:41,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:34:41,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:34:41,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 10:34:41,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:34:42,564 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-13 10:34:42,803 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2020-10-13 10:34:43,105 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2020-10-13 10:34:43,470 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 82 [2020-10-13 10:34:43,638 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-10-13 10:34:43,809 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2020-10-13 10:34:44,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:34:44,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:34:44,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:44,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:34:44,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:34:44,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:34:44,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:34:44,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:34:44,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:34:44,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:34:44,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:34:44,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:34:44,718 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 16 proven. 154 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:34:44,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011979284] [2020-10-13 10:34:44,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:34:44,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:34:44,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008052282] [2020-10-13 10:34:44,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:34:44,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:34:44,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:34:44,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=695, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:34:44,719 INFO L87 Difference]: Start difference. First operand 367 states and 415 transitions. Second operand 28 states. [2020-10-13 10:34:46,281 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-13 10:34:46,753 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-13 10:34:46,974 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-13 10:34:47,297 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-13 10:34:47,543 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-13 10:34:47,904 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 93 [2020-10-13 10:34:49,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:34:49,422 INFO L93 Difference]: Finished difference Result 429 states and 479 transitions. [2020-10-13 10:34:49,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:34:49,423 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 75 [2020-10-13 10:34:49,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:34:49,424 INFO L225 Difference]: With dead ends: 429 [2020-10-13 10:34:49,424 INFO L226 Difference]: Without dead ends: 383 [2020-10-13 10:34:49,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=159, Invalid=2193, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 10:34:49,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-10-13 10:34:49,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 314. [2020-10-13 10:34:49,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-10-13 10:34:49,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 355 transitions. [2020-10-13 10:34:49,444 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 355 transitions. Word has length 75 [2020-10-13 10:34:49,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:34:49,444 INFO L479 AbstractCegarLoop]: Abstraction has 314 states and 355 transitions. [2020-10-13 10:34:49,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:34:49,445 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 355 transitions. [2020-10-13 10:34:49,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 10:34:49,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:34:49,445 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:34:49,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-13 10:34:49,445 INFO L427 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:34:49,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:34:49,446 INFO L82 PathProgramCache]: Analyzing trace with hash -404312914, now seen corresponding path program 26 times [2020-10-13 10:34:49,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:34:49,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346078023] [2020-10-13 10:34:49,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:34:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:34:49,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:50,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:34:50,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 10:34:50,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:34:50,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1273 [2020-10-13 10:34:50,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:34:50,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 10:34:50,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:34:50,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 10:34:50,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:34:51,127 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2020-10-13 10:34:51,500 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-10-13 10:34:51,763 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2020-10-13 10:34:52,086 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2020-10-13 10:34:52,274 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-10-13 10:34:52,566 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 94 [2020-10-13 10:34:52,865 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 88 [2020-10-13 10:34:53,161 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 69 [2020-10-13 10:34:53,335 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-13 10:34:54,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:34:54,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:34:54,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:54,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:34:54,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:34:54,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:34:54,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:34:54,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:34:54,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:34:54,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:34:54,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:34:54,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:34:54,133 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:34:54,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346078023] [2020-10-13 10:34:54,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:34:54,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 10:34:54,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075748564] [2020-10-13 10:34:54,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 10:34:54,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:34:54,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 10:34:54,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:34:54,134 INFO L87 Difference]: Start difference. First operand 314 states and 355 transitions. Second operand 29 states. [2020-10-13 10:34:55,525 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 63 [2020-10-13 10:34:55,774 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 68 [2020-10-13 10:34:56,264 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-13 10:34:56,577 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-13 10:34:56,781 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-13 10:34:57,105 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-13 10:34:57,400 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-10-13 10:34:57,616 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-13 10:34:58,115 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 115 [2020-10-13 10:34:58,492 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 100 [2020-10-13 10:34:58,861 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 103 [2020-10-13 10:35:00,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:00,188 INFO L93 Difference]: Finished difference Result 456 states and 508 transitions. [2020-10-13 10:35:00,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 10:35:00,189 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 75 [2020-10-13 10:35:00,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:00,192 INFO L225 Difference]: With dead ends: 456 [2020-10-13 10:35:00,192 INFO L226 Difference]: Without dead ends: 452 [2020-10-13 10:35:00,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=218, Invalid=2644, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 10:35:00,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-10-13 10:35:00,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 375. [2020-10-13 10:35:00,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2020-10-13 10:35:00,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 425 transitions. [2020-10-13 10:35:00,233 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 425 transitions. Word has length 75 [2020-10-13 10:35:00,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:00,234 INFO L479 AbstractCegarLoop]: Abstraction has 375 states and 425 transitions. [2020-10-13 10:35:00,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 10:35:00,234 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 425 transitions. [2020-10-13 10:35:00,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 10:35:00,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:00,235 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:00,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-13 10:35:00,235 INFO L427 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:00,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:00,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1299903171, now seen corresponding path program 18 times [2020-10-13 10:35:00,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:00,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471828296] [2020-10-13 10:35:00,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:00,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:00,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:01,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:02,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:05,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:05,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 10:35:05,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:35:05,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-13 10:35:05,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:05,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:35:05,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:35:05,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 10:35:05,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:05,788 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-13 10:35:06,097 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-10-13 10:35:06,325 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2020-10-13 10:35:06,604 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-10-13 10:35:07,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:07,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:07,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:07,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:07,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:07,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:35:07,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:07,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:07,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:07,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:07,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 40 proven. 70 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-13 10:35:07,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471828296] [2020-10-13 10:35:07,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:07,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:35:07,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515221435] [2020-10-13 10:35:07,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:35:07,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:07,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:35:07,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:35:07,434 INFO L87 Difference]: Start difference. First operand 375 states and 425 transitions. Second operand 25 states.