/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/forester-heap/sll-optional-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:21:37,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:21:37,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:21:37,465 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:21:37,466 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:21:37,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:21:37,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:21:37,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:21:37,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:21:37,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:21:37,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:21:37,487 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:21:37,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:21:37,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:21:37,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:21:37,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:21:37,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:21:37,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:21:37,499 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:21:37,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:21:37,511 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:21:37,512 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:21:37,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:21:37,516 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:21:37,525 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:21:37,525 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:21:37,526 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:21:37,526 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:21:37,527 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:21:37,531 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:21:37,531 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:21:37,534 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:21:37,535 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:21:37,536 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:21:37,536 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:21:37,537 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:21:37,538 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:21:37,538 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:21:37,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:21:37,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:21:37,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:21:37,540 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 10:21:37,561 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:21:37,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:21:37,563 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:21:37,563 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:21:37,563 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:21:37,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:21:37,564 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:21:37,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:21:37,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:21:37,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:21:37,565 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:21:37,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:21:37,565 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:21:37,565 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:21:37,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:21:37,566 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:21:37,566 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:21:37,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:21:37,566 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:21:37,566 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:21:37,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:21:37,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:21:37,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:21:37,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:21:37,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:21:37,568 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:21:37,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:21:37,568 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:21:37,568 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:21:37,568 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 10:21:37,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:21:37,884 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:21:37,888 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:21:37,889 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:21:37,890 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:21:37,890 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-optional-1.i [2020-10-13 10:21:37,965 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/925434280/c91821df89004b0ea4ee2d62032d81a2/FLAGb06e78b59 [2020-10-13 10:21:38,474 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:21:38,475 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-optional-1.i [2020-10-13 10:21:38,487 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/925434280/c91821df89004b0ea4ee2d62032d81a2/FLAGb06e78b59 [2020-10-13 10:21:38,778 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/925434280/c91821df89004b0ea4ee2d62032d81a2 [2020-10-13 10:21:38,787 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:21:38,789 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:21:38,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:21:38,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:21:38,793 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:21:38,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:21:38" (1/1) ... [2020-10-13 10:21:38,796 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59c286c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:38, skipping insertion in model container [2020-10-13 10:21:38,797 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:21:38" (1/1) ... [2020-10-13 10:21:38,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:21:38,841 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:21:39,262 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:21:39,274 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:21:39,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:21:39,395 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:21:39,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:39 WrapperNode [2020-10-13 10:21:39,395 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:21:39,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:21:39,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:21:39,396 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:21:39,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:39" (1/1) ... [2020-10-13 10:21:39,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:39" (1/1) ... [2020-10-13 10:21:39,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:39" (1/1) ... [2020-10-13 10:21:39,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:39" (1/1) ... [2020-10-13 10:21:39,445 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:39" (1/1) ... [2020-10-13 10:21:39,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:39" (1/1) ... [2020-10-13 10:21:39,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:39" (1/1) ... [2020-10-13 10:21:39,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:21:39,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:21:39,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:21:39,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:21:39,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:39" (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 10:21:39,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:21:39,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:21:39,528 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:21:39,529 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-13 10:21:39,529 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-13 10:21:39,530 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-13 10:21:39,530 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-13 10:21:39,531 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-13 10:21:39,531 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-13 10:21:39,531 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-13 10:21:39,531 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-13 10:21:39,532 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-13 10:21:39,532 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-13 10:21:39,532 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-13 10:21:39,532 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-13 10:21:39,533 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-13 10:21:39,533 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-13 10:21:39,533 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-13 10:21:39,533 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-13 10:21:39,534 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-13 10:21:39,534 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-13 10:21:39,534 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-13 10:21:39,535 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-13 10:21:39,535 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-13 10:21:39,536 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-13 10:21:39,537 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-13 10:21:39,537 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-13 10:21:39,537 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-13 10:21:39,538 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-13 10:21:39,538 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-13 10:21:39,538 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-13 10:21:39,539 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-13 10:21:39,539 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-13 10:21:39,539 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-13 10:21:39,539 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-13 10:21:39,539 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-13 10:21:39,539 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-13 10:21:39,540 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-13 10:21:39,540 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-13 10:21:39,540 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-13 10:21:39,540 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-13 10:21:39,540 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-13 10:21:39,540 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-13 10:21:39,540 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-13 10:21:39,541 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-13 10:21:39,541 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-13 10:21:39,541 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-13 10:21:39,541 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-13 10:21:39,541 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-13 10:21:39,541 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-13 10:21:39,542 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-13 10:21:39,542 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-13 10:21:39,542 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-13 10:21:39,542 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 10:21:39,543 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-13 10:21:39,543 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-13 10:21:39,543 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-13 10:21:39,543 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-13 10:21:39,543 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-13 10:21:39,543 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-13 10:21:39,543 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-13 10:21:39,544 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-13 10:21:39,544 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:21:39,544 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-13 10:21:39,544 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-13 10:21:39,544 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-13 10:21:39,544 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:21:39,545 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-13 10:21:39,545 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-13 10:21:39,546 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-13 10:21:39,546 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-13 10:21:39,547 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-13 10:21:39,548 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-13 10:21:39,548 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-13 10:21:39,548 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-13 10:21:39,548 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-13 10:21:39,548 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-13 10:21:39,549 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-13 10:21:39,549 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-13 10:21:39,549 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-13 10:21:39,549 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-13 10:21:39,549 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-13 10:21:39,550 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-13 10:21:39,550 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-13 10:21:39,550 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-13 10:21:39,550 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-13 10:21:39,551 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-13 10:21:39,551 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-13 10:21:39,551 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-13 10:21:39,551 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-13 10:21:39,551 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-13 10:21:39,551 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-13 10:21:39,551 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-13 10:21:39,552 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-13 10:21:39,552 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-13 10:21:39,552 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-13 10:21:39,552 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-13 10:21:39,552 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-13 10:21:39,552 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-13 10:21:39,552 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-13 10:21:39,553 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-13 10:21:39,553 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-13 10:21:39,553 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-13 10:21:39,553 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-13 10:21:39,553 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-13 10:21:39,553 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-13 10:21:39,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:21:39,554 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:21:39,554 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:21:39,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 10:21:39,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-13 10:21:39,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 10:21:39,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-13 10:21:39,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 10:21:39,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 10:21:39,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:21:39,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:21:40,129 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:21:40,129 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-13 10:21:40,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:21:40 BoogieIcfgContainer [2020-10-13 10:21:40,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:21:40,134 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:21:40,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:21:40,138 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:21:40,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:21:38" (1/3) ... [2020-10-13 10:21:40,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a0d70d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:21:40, skipping insertion in model container [2020-10-13 10:21:40,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:39" (2/3) ... [2020-10-13 10:21:40,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a0d70d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:21:40, skipping insertion in model container [2020-10-13 10:21:40,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:21:40" (3/3) ... [2020-10-13 10:21:40,141 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-optional-1.i [2020-10-13 10:21:40,152 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:21:40,159 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:21:40,174 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:21:40,198 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:21:40,198 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:21:40,199 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:21:40,199 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:21:40,202 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:21:40,202 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:21:40,203 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:21:40,203 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:21:40,220 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-13 10:21:40,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 10:21:40,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:40,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:40,228 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:40,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:40,235 INFO L82 PathProgramCache]: Analyzing trace with hash 905993573, now seen corresponding path program 1 times [2020-10-13 10:21:40,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:40,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426867537] [2020-10-13 10:21:40,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:40,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:40,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:40,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:41,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:41,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:41,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:41,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:21:41,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:21:41,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 975 [2020-10-13 10:21:41,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:41,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:41,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:21:41,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:41,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:21:41,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:41,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:41,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:41,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:41,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:41,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:41,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:21:41,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:41,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:41,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:41,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:41,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:41,443 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 10:21:41,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426867537] [2020-10-13 10:21:41,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:21:41,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:21:41,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104468009] [2020-10-13 10:21:41,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:21:41,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:41,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:21:41,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:21:41,471 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-13 10:21:41,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:41,619 INFO L93 Difference]: Finished difference Result 57 states and 83 transitions. [2020-10-13 10:21:41,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:21:41,621 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-13 10:21:41,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:41,634 INFO L225 Difference]: With dead ends: 57 [2020-10-13 10:21:41,634 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 10:21:41,638 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 10:21:41,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 10:21:41,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-13 10:21:41,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 10:21:41,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-10-13 10:21:41,684 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 19 [2020-10-13 10:21:41,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:41,684 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-10-13 10:21:41,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:21:41,685 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-10-13 10:21:41,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:21:41,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:41,686 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 10:21:41,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:21:41,686 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:41,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:41,687 INFO L82 PathProgramCache]: Analyzing trace with hash 550815853, now seen corresponding path program 1 times [2020-10-13 10:21:41,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:41,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892258110] [2020-10-13 10:21:41,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:41,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:41,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:41,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:41,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:41,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:42,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:42,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:21:42,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:21:42,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 428 [2020-10-13 10:21:42,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:42,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:21:42,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 10:21:42,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:21:42,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:21:42,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:42,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:42,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:42,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:42,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:42,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:42,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:21:42,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:42,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:42,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:42,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:42,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:21:42,197 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 10:21:42,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892258110] [2020-10-13 10:21:42,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:21:42,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:21:42,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135069852] [2020-10-13 10:21:42,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:21:42,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:42,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:21:42,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:21:42,206 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 4 states. [2020-10-13 10:21:42,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:42,342 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2020-10-13 10:21:42,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:21:42,343 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-13 10:21:42,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:42,348 INFO L225 Difference]: With dead ends: 29 [2020-10-13 10:21:42,348 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 10:21:42,350 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 10:21:42,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 10:21:42,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-13 10:21:42,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 10:21:42,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2020-10-13 10:21:42,361 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 20 [2020-10-13 10:21:42,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:42,363 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2020-10-13 10:21:42,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:21:42,363 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2020-10-13 10:21:42,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:21:42,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:42,365 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 10:21:42,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:21:42,368 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:42,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:42,369 INFO L82 PathProgramCache]: Analyzing trace with hash 550817775, now seen corresponding path program 1 times [2020-10-13 10:21:42,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:42,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550318773] [2020-10-13 10:21:42,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:42,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:42,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:42,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:42,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:43,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:43,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:21:43,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:21:43,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 812 [2020-10-13 10:21:43,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:43,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:21:43,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 10:21:43,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:21:43,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:21:43,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:43,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:43,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:43,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:43,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:43,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:21:43,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:43,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:43,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:43,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:43,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:21:43,356 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 10:21:43,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550318773] [2020-10-13 10:21:43,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:21:43,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 10:21:43,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219831623] [2020-10-13 10:21:43,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:21:43,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:43,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:21:43,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:21:43,362 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 7 states. [2020-10-13 10:21:43,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:43,631 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2020-10-13 10:21:43,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:21:43,631 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-13 10:21:43,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:43,632 INFO L225 Difference]: With dead ends: 44 [2020-10-13 10:21:43,633 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 10:21:43,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:21:43,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 10:21:43,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2020-10-13 10:21:43,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 10:21:43,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2020-10-13 10:21:43,644 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 20 [2020-10-13 10:21:43,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:43,644 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2020-10-13 10:21:43,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:21:43,645 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2020-10-13 10:21:43,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:21:43,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:43,647 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 10:21:43,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:21:43,647 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:43,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:43,648 INFO L82 PathProgramCache]: Analyzing trace with hash 548970733, now seen corresponding path program 1 times [2020-10-13 10:21:43,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:43,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315248641] [2020-10-13 10:21:43,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:43,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:43,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:43,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:21:43,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:43,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-13 10:21:43,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:43,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:21:43,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:43,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:21:43,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:43,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:43,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:43,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:43,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:43,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:43,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:43,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:21:43,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:43,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:43,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:43,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:43,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:43,944 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 10:21:43,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315248641] [2020-10-13 10:21:43,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:21:43,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 10:21:43,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736816403] [2020-10-13 10:21:43,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:21:43,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:43,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:21:43,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:21:43,949 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand 8 states. [2020-10-13 10:21:44,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:44,347 INFO L93 Difference]: Finished difference Result 92 states and 119 transitions. [2020-10-13 10:21:44,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:21:44,347 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-13 10:21:44,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:44,349 INFO L225 Difference]: With dead ends: 92 [2020-10-13 10:21:44,349 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 10:21:44,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:21:44,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 10:21:44,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 44. [2020-10-13 10:21:44,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 10:21:44,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 58 transitions. [2020-10-13 10:21:44,359 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 58 transitions. Word has length 20 [2020-10-13 10:21:44,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:44,359 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 58 transitions. [2020-10-13 10:21:44,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:21:44,360 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 58 transitions. [2020-10-13 10:21:44,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:21:44,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:44,361 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 10:21:44,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:21:44,361 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:44,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:44,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1969142159, now seen corresponding path program 1 times [2020-10-13 10:21:44,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:44,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341319506] [2020-10-13 10:21:44,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:44,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:44,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:44,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:44,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:44,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:44,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:21:44,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:21:44,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 360 [2020-10-13 10:21:44,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:44,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:21:44,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:44,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:21:44,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:21:44,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:44,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:44,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:44,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:44,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:44,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:21:44,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:44,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:44,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:44,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:44,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:44,809 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 10:21:44,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341319506] [2020-10-13 10:21:44,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:21:44,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 10:21:44,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689670249] [2020-10-13 10:21:44,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:21:44,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:44,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:21:44,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:21:44,811 INFO L87 Difference]: Start difference. First operand 44 states and 58 transitions. Second operand 7 states. [2020-10-13 10:21:45,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:45,047 INFO L93 Difference]: Finished difference Result 85 states and 110 transitions. [2020-10-13 10:21:45,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:21:45,048 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-13 10:21:45,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:45,049 INFO L225 Difference]: With dead ends: 85 [2020-10-13 10:21:45,049 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 10:21:45,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:21:45,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 10:21:45,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 42. [2020-10-13 10:21:45,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 10:21:45,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2020-10-13 10:21:45,057 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 20 [2020-10-13 10:21:45,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:45,058 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2020-10-13 10:21:45,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:21:45,058 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2020-10-13 10:21:45,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 10:21:45,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:45,059 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] [2020-10-13 10:21:45,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:21:45,060 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:45,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:45,060 INFO L82 PathProgramCache]: Analyzing trace with hash -2020944649, now seen corresponding path program 1 times [2020-10-13 10:21:45,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:45,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810607446] [2020-10-13 10:21:45,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:45,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:45,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:45,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:45,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:45,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:45,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 10:21:45,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:21:45,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 468 [2020-10-13 10:21:45,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:45,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:21:45,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:21:45,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:21:45,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:45,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:45,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:45,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:45,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:45,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:45,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:45,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:21:45,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:45,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:45,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:45,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:45,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:21:45,620 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 10:21:45,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810607446] [2020-10-13 10:21:45,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:21:45,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:21:45,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902295592] [2020-10-13 10:21:45,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:21:45,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:45,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:21:45,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:21:45,622 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand 6 states. [2020-10-13 10:21:45,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:45,824 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2020-10-13 10:21:45,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:21:45,825 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-13 10:21:45,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:45,826 INFO L225 Difference]: With dead ends: 104 [2020-10-13 10:21:45,826 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 10:21:45,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:21:45,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 10:21:45,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 49. [2020-10-13 10:21:45,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 10:21:45,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2020-10-13 10:21:45,835 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 21 [2020-10-13 10:21:45,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:45,835 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2020-10-13 10:21:45,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:21:45,835 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2020-10-13 10:21:45,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 10:21:45,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:45,837 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] [2020-10-13 10:21:45,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:21:45,837 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:45,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:45,837 INFO L82 PathProgramCache]: Analyzing trace with hash -244090245, now seen corresponding path program 1 times [2020-10-13 10:21:45,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:45,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134925992] [2020-10-13 10:21:45,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:45,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:45,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:45,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 10:21:45,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:45,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-13 10:21:45,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:45,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:21:45,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:21:45,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:21:45,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:45,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:45,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:45,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:45,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:45,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:45,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:45,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:21:45,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:45,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:45,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:45,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:45,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:45,980 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 10:21:45,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134925992] [2020-10-13 10:21:45,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:21:45,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:21:45,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39843953] [2020-10-13 10:21:45,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:21:45,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:45,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:21:45,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:21:45,982 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand 6 states. [2020-10-13 10:21:46,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:46,194 INFO L93 Difference]: Finished difference Result 91 states and 116 transitions. [2020-10-13 10:21:46,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:21:46,195 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-13 10:21:46,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:46,196 INFO L225 Difference]: With dead ends: 91 [2020-10-13 10:21:46,196 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 10:21:46,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:21:46,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 10:21:46,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2020-10-13 10:21:46,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 10:21:46,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2020-10-13 10:21:46,205 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 21 [2020-10-13 10:21:46,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:46,205 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2020-10-13 10:21:46,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:21:46,205 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2020-10-13 10:21:46,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 10:21:46,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:46,206 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] [2020-10-13 10:21:46,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:21:46,207 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:46,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:46,207 INFO L82 PathProgramCache]: Analyzing trace with hash 61652601, now seen corresponding path program 1 times [2020-10-13 10:21:46,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:46,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271472291] [2020-10-13 10:21:46,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:46,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:46,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:46,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:46,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 10:21:46,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:46,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-10-13 10:21:46,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:46,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:21:46,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:46,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:21:46,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:21:46,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:46,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:46,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:46,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:46,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:46,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:21:46,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:46,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:46,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:46,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:46,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:46,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:46,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271472291] [2020-10-13 10:21:46,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:21:46,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:21:46,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734201950] [2020-10-13 10:21:46,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:21:46,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:46,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:21:46,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:21:46,968 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand 11 states. [2020-10-13 10:21:47,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:47,779 INFO L93 Difference]: Finished difference Result 122 states and 158 transitions. [2020-10-13 10:21:47,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:21:47,780 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-10-13 10:21:47,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:47,781 INFO L225 Difference]: With dead ends: 122 [2020-10-13 10:21:47,781 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 10:21:47,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:21:47,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 10:21:47,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 67. [2020-10-13 10:21:47,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 10:21:47,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2020-10-13 10:21:47,791 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 23 [2020-10-13 10:21:47,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:47,791 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2020-10-13 10:21:47,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:21:47,791 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2020-10-13 10:21:47,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 10:21:47,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:47,793 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] [2020-10-13 10:21:47,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:21:47,793 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:47,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:47,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1838507005, now seen corresponding path program 1 times [2020-10-13 10:21:47,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:47,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066535359] [2020-10-13 10:21:47,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:47,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:47,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:47,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:48,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:48,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:48,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 10:21:48,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:21:48,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 953 [2020-10-13 10:21:48,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:48,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:21:48,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:48,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:21:48,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:21:48,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:48,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:48,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:48,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:48,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:48,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:48,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:21:48,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:48,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:48,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:48,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:48,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:48,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:48,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066535359] [2020-10-13 10:21:48,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:21:48,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:21:48,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289446515] [2020-10-13 10:21:48,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:21:48,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:48,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:21:48,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:21:48,991 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand 10 states. [2020-10-13 10:21:49,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:49,358 INFO L93 Difference]: Finished difference Result 111 states and 144 transitions. [2020-10-13 10:21:49,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:21:49,359 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-13 10:21:49,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:49,360 INFO L225 Difference]: With dead ends: 111 [2020-10-13 10:21:49,360 INFO L226 Difference]: Without dead ends: 90 [2020-10-13 10:21:49,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:21:49,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-13 10:21:49,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 59. [2020-10-13 10:21:49,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 10:21:49,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2020-10-13 10:21:49,368 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 23 [2020-10-13 10:21:49,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:49,368 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2020-10-13 10:21:49,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:21:49,369 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2020-10-13 10:21:49,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 10:21:49,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:49,370 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:49,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:21:49,370 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:49,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:49,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1799525935, now seen corresponding path program 1 times [2020-10-13 10:21:49,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:49,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537106826] [2020-10-13 10:21:49,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:49,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:49,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:49,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:49,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:49,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:50,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:50,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:50,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:50,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:51,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:51,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:21:51,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 10:21:51,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1840 [2020-10-13 10:21:51,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:51,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:21:51,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:51,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:21:51,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:51,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:51,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:51,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:51,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:51,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:51,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:21:51,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:51,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:51,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:51,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:51,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:51,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537106826] [2020-10-13 10:21:51,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:21:51,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:21:51,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848791179] [2020-10-13 10:21:51,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:21:51,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:51,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:21:51,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:21:51,402 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand 10 states. [2020-10-13 10:21:51,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:51,820 INFO L93 Difference]: Finished difference Result 136 states and 181 transitions. [2020-10-13 10:21:51,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:21:51,821 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-13 10:21:51,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:51,821 INFO L225 Difference]: With dead ends: 136 [2020-10-13 10:21:51,822 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 10:21:51,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:21:51,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 10:21:51,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 67. [2020-10-13 10:21:51,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 10:21:51,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2020-10-13 10:21:51,830 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 24 [2020-10-13 10:21:51,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:51,830 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2020-10-13 10:21:51,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:21:51,831 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2020-10-13 10:21:51,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 10:21:51,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:51,832 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:51,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:21:51,832 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:51,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:51,832 INFO L82 PathProgramCache]: Analyzing trace with hash -718586957, now seen corresponding path program 1 times [2020-10-13 10:21:51,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:51,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919405121] [2020-10-13 10:21:51,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:51,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:51,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:52,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:21:52,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:52,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-13 10:21:52,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:52,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:21:52,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:52,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:21:52,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:52,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:52,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:52,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:52,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:52,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:52,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:21:52,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:52,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:52,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:52,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:52,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:21:52,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:52,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919405121] [2020-10-13 10:21:52,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:21:52,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:21:52,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43047364] [2020-10-13 10:21:52,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:21:52,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:52,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:21:52,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:21:52,224 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand 10 states. [2020-10-13 10:21:52,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:52,768 INFO L93 Difference]: Finished difference Result 109 states and 142 transitions. [2020-10-13 10:21:52,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:21:52,769 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-13 10:21:52,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:52,770 INFO L225 Difference]: With dead ends: 109 [2020-10-13 10:21:52,770 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 10:21:52,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:21:52,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 10:21:52,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 58. [2020-10-13 10:21:52,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 10:21:52,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 77 transitions. [2020-10-13 10:21:52,778 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 77 transitions. Word has length 24 [2020-10-13 10:21:52,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:52,778 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 77 transitions. [2020-10-13 10:21:52,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:21:52,778 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 77 transitions. [2020-10-13 10:21:52,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:21:52,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:52,779 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:52,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:21:52,780 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:52,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:52,780 INFO L82 PathProgramCache]: Analyzing trace with hash 257989204, now seen corresponding path program 1 times [2020-10-13 10:21:52,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:52,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431691168] [2020-10-13 10:21:52,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:52,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:52,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:52,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:52,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:52,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:52,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:53,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:53,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:21:53,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:21:53,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 842 [2020-10-13 10:21:53,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:53,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:21:53,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 10:21:53,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 10:21:53,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:21:53,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:53,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:53,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:53,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:53,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:53,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:53,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:21:53,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:53,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:53,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:53,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:53,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:21:53,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:21:53,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431691168] [2020-10-13 10:21:53,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:21:53,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:21:53,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979908180] [2020-10-13 10:21:53,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:21:53,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:53,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:21:53,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:21:53,681 INFO L87 Difference]: Start difference. First operand 58 states and 77 transitions. Second operand 5 states. [2020-10-13 10:21:53,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:53,800 INFO L93 Difference]: Finished difference Result 81 states and 108 transitions. [2020-10-13 10:21:53,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:21:53,800 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-10-13 10:21:53,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:53,802 INFO L225 Difference]: With dead ends: 81 [2020-10-13 10:21:53,802 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 10:21:53,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:21:53,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 10:21:53,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2020-10-13 10:21:53,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 10:21:53,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2020-10-13 10:21:53,825 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 30 [2020-10-13 10:21:53,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:53,825 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2020-10-13 10:21:53,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:21:53,826 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2020-10-13 10:21:53,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:21:53,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:53,831 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:53,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:21:53,832 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:53,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:53,833 INFO L82 PathProgramCache]: Analyzing trace with hash -328816810, now seen corresponding path program 1 times [2020-10-13 10:21:53,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:53,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662912726] [2020-10-13 10:21:53,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:53,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:53,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:53,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:53,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:54,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:54,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:54,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:55,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:55,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:21:55,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 10:21:55,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1212 [2020-10-13 10:21:55,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:55,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:21:55,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:55,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:21:55,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:55,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:55,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:55,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:55,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:55,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:55,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:21:55,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:55,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:55,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:55,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:55,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:21:55,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662912726] [2020-10-13 10:21:55,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:21:55,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 10:21:55,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4680564] [2020-10-13 10:21:55,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:21:55,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:55,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:21:55,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:21:55,122 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand 8 states. [2020-10-13 10:21:55,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:55,356 INFO L93 Difference]: Finished difference Result 115 states and 146 transitions. [2020-10-13 10:21:55,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:21:55,357 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-13 10:21:55,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:55,358 INFO L225 Difference]: With dead ends: 115 [2020-10-13 10:21:55,358 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 10:21:55,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:21:55,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 10:21:55,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 70. [2020-10-13 10:21:55,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 10:21:55,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2020-10-13 10:21:55,377 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 30 [2020-10-13 10:21:55,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:55,378 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2020-10-13 10:21:55,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:21:55,379 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2020-10-13 10:21:55,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:21:55,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:55,380 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:55,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:21:55,380 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:55,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:55,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1537852882, now seen corresponding path program 1 times [2020-10-13 10:21:55,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:55,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033816851] [2020-10-13 10:21:55,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:55,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:55,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:55,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:21:55,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:55,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-13 10:21:55,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:55,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:21:55,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:55,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:21:55,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:55,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:55,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:55,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:55,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:55,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:55,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:21:55,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:55,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:55,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:55,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:55,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:55,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033816851] [2020-10-13 10:21:55,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:21:55,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:21:55,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717961901] [2020-10-13 10:21:55,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:21:55,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:55,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:21:55,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:21:55,547 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand 7 states. [2020-10-13 10:21:55,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:55,760 INFO L93 Difference]: Finished difference Result 113 states and 142 transitions. [2020-10-13 10:21:55,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:21:55,761 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-13 10:21:55,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:55,762 INFO L225 Difference]: With dead ends: 113 [2020-10-13 10:21:55,762 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 10:21:55,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:21:55,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 10:21:55,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-13 10:21:55,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 10:21:55,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2020-10-13 10:21:55,772 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 30 [2020-10-13 10:21:55,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:55,773 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2020-10-13 10:21:55,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:21:55,773 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2020-10-13 10:21:55,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 10:21:55,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:55,774 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:55,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:21:55,774 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:55,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:55,775 INFO L82 PathProgramCache]: Analyzing trace with hash 61621730, now seen corresponding path program 1 times [2020-10-13 10:21:55,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:55,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878122992] [2020-10-13 10:21:55,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:55,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:55,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:55,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:56,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:56,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:56,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:57,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:00,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:00,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 10:22:00,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:22:00,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 10:22:00,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:00,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:22:00,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:22:00,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:22:00,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:22:00,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:22:00,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:00,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:00,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:00,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:22:00,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:22:00,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:22:00,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:00,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:22:00,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:22:00,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:22:00,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:22:00,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:22:00,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878122992] [2020-10-13 10:22:00,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:22:00,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:22:00,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403861861] [2020-10-13 10:22:00,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:22:00,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:22:00,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:22:00,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:22:00,939 INFO L87 Difference]: Start difference. First operand 68 states and 87 transitions. Second operand 10 states. [2020-10-13 10:22:01,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:22:01,251 INFO L93 Difference]: Finished difference Result 109 states and 136 transitions. [2020-10-13 10:22:01,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:22:01,252 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-13 10:22:01,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:22:01,253 INFO L225 Difference]: With dead ends: 109 [2020-10-13 10:22:01,253 INFO L226 Difference]: Without dead ends: 90 [2020-10-13 10:22:01,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:22:01,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-13 10:22:01,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 68. [2020-10-13 10:22:01,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 10:22:01,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2020-10-13 10:22:01,265 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 33 [2020-10-13 10:22:01,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:22:01,266 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2020-10-13 10:22:01,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:22:01,266 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2020-10-13 10:22:01,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 10:22:01,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:22:01,267 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:22:01,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:22:01,267 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:22:01,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:22:01,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1928291422, now seen corresponding path program 1 times [2020-10-13 10:22:01,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:22:01,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576603033] [2020-10-13 10:22:01,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:22:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:01,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:01,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:01,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:01,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:01,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 10:22:01,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:22:01,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 588 [2020-10-13 10:22:01,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:01,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:22:01,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:22:01,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:22:01,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:02,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:22:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:02,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:02,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:02,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:22:02,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:22:02,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:22:02,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:02,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:22:02,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:22:02,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:22:02,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:02,139 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:22:02,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576603033] [2020-10-13 10:22:02,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:22:02,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:22:02,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081212111] [2020-10-13 10:22:02,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:22:02,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:22:02,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:22:02,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:22:02,143 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand 11 states. [2020-10-13 10:22:02,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:22:02,789 INFO L93 Difference]: Finished difference Result 172 states and 217 transitions. [2020-10-13 10:22:02,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:22:02,795 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-13 10:22:02,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:22:02,797 INFO L225 Difference]: With dead ends: 172 [2020-10-13 10:22:02,797 INFO L226 Difference]: Without dead ends: 153 [2020-10-13 10:22:02,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:22:02,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-13 10:22:02,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 109. [2020-10-13 10:22:02,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 10:22:02,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 139 transitions. [2020-10-13 10:22:02,811 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 139 transitions. Word has length 33 [2020-10-13 10:22:02,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:22:02,811 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 139 transitions. [2020-10-13 10:22:02,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:22:02,811 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 139 transitions. [2020-10-13 10:22:02,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 10:22:02,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:22:02,812 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:22:02,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:22:02,813 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:22:02,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:22:02,813 INFO L82 PathProgramCache]: Analyzing trace with hash -589821470, now seen corresponding path program 1 times [2020-10-13 10:22:02,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:22:02,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789552307] [2020-10-13 10:22:02,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:22:02,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:02,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:02,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:02,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:03,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:03,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:03,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:03,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:04,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:04,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:04,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:04,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 10:22:04,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 10:22:04,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2150 [2020-10-13 10:22:04,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:04,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:22:04,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:22:04,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:22:04,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:05,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:22:05,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:05,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:05,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:05,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:22:05,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:22:05,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:22:05,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:05,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:22:05,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:22:05,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:22:05,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:22:05,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789552307] [2020-10-13 10:22:05,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:22:05,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:22:05,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358943239] [2020-10-13 10:22:05,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:22:05,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:22:05,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:22:05,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:22:05,225 INFO L87 Difference]: Start difference. First operand 109 states and 139 transitions. Second operand 11 states. [2020-10-13 10:22:05,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:22:05,931 INFO L93 Difference]: Finished difference Result 173 states and 217 transitions. [2020-10-13 10:22:05,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:22:05,931 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-13 10:22:05,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:22:05,933 INFO L225 Difference]: With dead ends: 173 [2020-10-13 10:22:05,934 INFO L226 Difference]: Without dead ends: 150 [2020-10-13 10:22:05,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:22:05,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-13 10:22:05,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 107. [2020-10-13 10:22:05,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-13 10:22:05,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 135 transitions. [2020-10-13 10:22:05,948 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 135 transitions. Word has length 33 [2020-10-13 10:22:05,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:22:05,948 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 135 transitions. [2020-10-13 10:22:05,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:22:05,948 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 135 transitions. [2020-10-13 10:22:05,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:22:05,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:22:05,949 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:22:05,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:22:05,950 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:22:05,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:22:05,950 INFO L82 PathProgramCache]: Analyzing trace with hash 298692122, now seen corresponding path program 1 times [2020-10-13 10:22:05,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:22:05,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121697342] [2020-10-13 10:22:05,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:22:05,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:05,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:06,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:06,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:06,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:06,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:06,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:06,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:06,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:06,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:06,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:07,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:07,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:07,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:07,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:07,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:07,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:07,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:07,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:07,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:07,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:09,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:09,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:22:09,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-13 10:22:09,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3194 [2020-10-13 10:22:09,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:09,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:22:09,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:22:09,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:22:09,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:09,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:22:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:09,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:09,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:09,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:22:09,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:22:09,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:22:09,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:09,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:22:09,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:22:09,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:22:09,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:09,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:22:09,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121697342] [2020-10-13 10:22:09,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:22:09,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:22:09,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93331530] [2020-10-13 10:22:09,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:22:09,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:22:09,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:22:09,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:22:09,308 INFO L87 Difference]: Start difference. First operand 107 states and 135 transitions. Second operand 10 states. [2020-10-13 10:22:09,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:22:09,954 INFO L93 Difference]: Finished difference Result 248 states and 312 transitions. [2020-10-13 10:22:09,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:22:09,955 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-13 10:22:09,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:22:09,957 INFO L225 Difference]: With dead ends: 248 [2020-10-13 10:22:09,957 INFO L226 Difference]: Without dead ends: 229 [2020-10-13 10:22:09,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:22:09,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-13 10:22:09,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 144. [2020-10-13 10:22:09,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-13 10:22:09,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 181 transitions. [2020-10-13 10:22:09,978 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 181 transitions. Word has length 34 [2020-10-13 10:22:09,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:22:09,979 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 181 transitions. [2020-10-13 10:22:09,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:22:09,979 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 181 transitions. [2020-10-13 10:22:09,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:22:09,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:22:09,980 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:22:09,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:22:09,980 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:22:09,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:22:09,981 INFO L82 PathProgramCache]: Analyzing trace with hash 2075546526, now seen corresponding path program 1 times [2020-10-13 10:22:09,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:22:09,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108020286] [2020-10-13 10:22:09,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:22:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:10,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:10,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:10,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:10,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:10,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:10,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:10,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:22:10,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:22:10,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 651 [2020-10-13 10:22:10,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:10,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:22:10,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:22:10,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:22:10,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:10,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:22:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:10,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:10,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:10,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:22:10,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:22:10,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:22:10,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:10,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:22:10,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:22:10,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:22:10,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:10,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:22:10,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108020286] [2020-10-13 10:22:10,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:22:10,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:22:10,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217750110] [2020-10-13 10:22:10,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:22:10,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:22:10,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:22:10,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:22:10,967 INFO L87 Difference]: Start difference. First operand 144 states and 181 transitions. Second operand 12 states. [2020-10-13 10:22:12,129 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-13 10:22:12,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:22:12,367 INFO L93 Difference]: Finished difference Result 225 states and 277 transitions. [2020-10-13 10:22:12,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:22:12,367 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-13 10:22:12,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:22:12,370 INFO L225 Difference]: With dead ends: 225 [2020-10-13 10:22:12,370 INFO L226 Difference]: Without dead ends: 223 [2020-10-13 10:22:12,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:22:12,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-13 10:22:12,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 153. [2020-10-13 10:22:12,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-13 10:22:12,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 192 transitions. [2020-10-13 10:22:12,387 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 192 transitions. Word has length 34 [2020-10-13 10:22:12,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:22:12,387 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 192 transitions. [2020-10-13 10:22:12,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:22:12,388 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 192 transitions. [2020-10-13 10:22:12,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:22:12,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:22:12,388 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:22:12,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:22:12,389 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:22:12,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:22:12,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1506746212, now seen corresponding path program 1 times [2020-10-13 10:22:12,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:22:12,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006894146] [2020-10-13 10:22:12,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:22:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:12,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:12,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:12,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:12,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:12,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:12,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:12,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:12,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:13,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:13,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:13,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:13,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:13,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:13,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:13,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:13,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:13,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:13,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:13,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:14,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:15,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:15,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:22:15,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-13 10:22:15,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2861 [2020-10-13 10:22:15,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:15,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:22:15,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:22:15,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:22:15,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:15,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:22:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:15,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:15,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:15,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:22:15,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:22:15,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:22:15,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:15,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:22:15,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:22:15,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:22:15,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:15,392 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:22:15,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006894146] [2020-10-13 10:22:15,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:22:15,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:22:15,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665542816] [2020-10-13 10:22:15,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:22:15,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:22:15,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:22:15,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:22:15,394 INFO L87 Difference]: Start difference. First operand 153 states and 192 transitions. Second operand 10 states. [2020-10-13 10:22:16,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:22:16,044 INFO L93 Difference]: Finished difference Result 291 states and 362 transitions. [2020-10-13 10:22:16,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:22:16,045 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-13 10:22:16,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:22:16,048 INFO L225 Difference]: With dead ends: 291 [2020-10-13 10:22:16,048 INFO L226 Difference]: Without dead ends: 272 [2020-10-13 10:22:16,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:22:16,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-13 10:22:16,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 169. [2020-10-13 10:22:16,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-13 10:22:16,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 211 transitions. [2020-10-13 10:22:16,090 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 211 transitions. Word has length 34 [2020-10-13 10:22:16,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:22:16,091 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 211 transitions. [2020-10-13 10:22:16,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:22:16,091 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 211 transitions. [2020-10-13 10:22:16,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:22:16,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:22:16,092 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:22:16,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:22:16,092 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:22:16,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:22:16,093 INFO L82 PathProgramCache]: Analyzing trace with hash 270108192, now seen corresponding path program 1 times [2020-10-13 10:22:16,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:22:16,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952446504] [2020-10-13 10:22:16,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:22:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:16,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:16,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:16,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:16,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:16,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:16,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:16,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:22:16,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:22:16,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 605 [2020-10-13 10:22:16,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:16,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:22:16,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:22:16,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:22:16,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:16,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:22:16,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:16,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:16,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:16,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:22:16,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:22:16,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:22:16,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:16,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:22:16,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:22:16,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:22:16,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:16,934 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:22:16,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952446504] [2020-10-13 10:22:16,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:22:16,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:22:16,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719835494] [2020-10-13 10:22:16,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:22:16,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:22:16,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:22:16,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:22:16,936 INFO L87 Difference]: Start difference. First operand 169 states and 211 transitions. Second operand 12 states. [2020-10-13 10:22:18,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:22:18,417 INFO L93 Difference]: Finished difference Result 297 states and 366 transitions. [2020-10-13 10:22:18,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:22:18,417 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-13 10:22:18,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:22:18,419 INFO L225 Difference]: With dead ends: 297 [2020-10-13 10:22:18,419 INFO L226 Difference]: Without dead ends: 295 [2020-10-13 10:22:18,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=255, Invalid=935, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:22:18,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-13 10:22:18,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 153. [2020-10-13 10:22:18,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-13 10:22:18,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 192 transitions. [2020-10-13 10:22:18,443 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 192 transitions. Word has length 34 [2020-10-13 10:22:18,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:22:18,444 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 192 transitions. [2020-10-13 10:22:18,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:22:18,444 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 192 transitions. [2020-10-13 10:22:18,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 10:22:18,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:22:18,445 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:22:18,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:22:18,445 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:22:18,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:22:18,446 INFO L82 PathProgramCache]: Analyzing trace with hash -784315474, now seen corresponding path program 1 times [2020-10-13 10:22:18,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:22:18,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406267996] [2020-10-13 10:22:18,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:22:18,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:18,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:18,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:18,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:18,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 10:22:18,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:22:18,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-10-13 10:22:18,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:18,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:22:18,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:22:18,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:22:18,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:18,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:22:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:18,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:18,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:18,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:22:18,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:22:18,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:22:18,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:18,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:22:18,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:22:18,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:22:18,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:18,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:22:18,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406267996] [2020-10-13 10:22:18,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:22:18,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:22:18,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085667984] [2020-10-13 10:22:18,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:22:18,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:22:18,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:22:18,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:22:18,898 INFO L87 Difference]: Start difference. First operand 153 states and 192 transitions. Second operand 10 states. [2020-10-13 10:22:19,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:22:19,607 INFO L93 Difference]: Finished difference Result 207 states and 257 transitions. [2020-10-13 10:22:19,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:22:19,610 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-13 10:22:19,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:22:19,612 INFO L225 Difference]: With dead ends: 207 [2020-10-13 10:22:19,612 INFO L226 Difference]: Without dead ends: 205 [2020-10-13 10:22:19,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:22:19,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-13 10:22:19,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 141. [2020-10-13 10:22:19,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-13 10:22:19,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 178 transitions. [2020-10-13 10:22:19,627 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 178 transitions. Word has length 35 [2020-10-13 10:22:19,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:22:19,628 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 178 transitions. [2020-10-13 10:22:19,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:22:19,628 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 178 transitions. [2020-10-13 10:22:19,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:22:19,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:22:19,629 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:22:19,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:22:19,629 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:22:19,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:22:19,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1583568302, now seen corresponding path program 2 times [2020-10-13 10:22:19,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:22:19,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172186609] [2020-10-13 10:22:19,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:22:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:19,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:19,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:20,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:20,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:20,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:22:20,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:22:20,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1171 [2020-10-13 10:22:20,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:20,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:22:20,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:22:20,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:22:20,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:21,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:22:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:21,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:21,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:21,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:22:21,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:22:21,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:22:21,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:21,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:22:21,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:22:21,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:22:21,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:21,294 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:22:21,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172186609] [2020-10-13 10:22:21,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:22:21,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:22:21,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548240574] [2020-10-13 10:22:21,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:22:21,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:22:21,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:22:21,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:22:21,296 INFO L87 Difference]: Start difference. First operand 141 states and 178 transitions. Second operand 13 states. [2020-10-13 10:22:22,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:22:22,320 INFO L93 Difference]: Finished difference Result 249 states and 316 transitions. [2020-10-13 10:22:22,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:22:22,320 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-13 10:22:22,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:22:22,322 INFO L225 Difference]: With dead ends: 249 [2020-10-13 10:22:22,323 INFO L226 Difference]: Without dead ends: 230 [2020-10-13 10:22:22,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:22:22,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-13 10:22:22,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 183. [2020-10-13 10:22:22,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-13 10:22:22,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 234 transitions. [2020-10-13 10:22:22,349 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 234 transitions. Word has length 36 [2020-10-13 10:22:22,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:22:22,350 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 234 transitions. [2020-10-13 10:22:22,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:22:22,350 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 234 transitions. [2020-10-13 10:22:22,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:22:22,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:22:22,351 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:22:22,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 10:22:22,351 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:22:22,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:22:22,352 INFO L82 PathProgramCache]: Analyzing trace with hash 193286102, now seen corresponding path program 2 times [2020-10-13 10:22:22,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:22:22,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617916920] [2020-10-13 10:22:22,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:22:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:22,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:22,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:22,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:22,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:22,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:23,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:23,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:23,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:24,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:24,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:24,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:22:24,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 10:22:24,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1983 [2020-10-13 10:22:24,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:24,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:22:24,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:22:24,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 10:22:24,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:24,645 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-10-13 10:22:24,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:22:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:24,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:24,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:24,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:22:24,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:22:24,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:22:24,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:24,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:22:24,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:22:24,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:22:24,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:24,768 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:22:24,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617916920] [2020-10-13 10:22:24,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:22:24,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:22:24,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425699498] [2020-10-13 10:22:24,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:22:24,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:22:24,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:22:24,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:22:24,770 INFO L87 Difference]: Start difference. First operand 183 states and 234 transitions. Second operand 13 states. [2020-10-13 10:22:25,188 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-10-13 10:22:25,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:22:25,816 INFO L93 Difference]: Finished difference Result 338 states and 426 transitions. [2020-10-13 10:22:25,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:22:25,817 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-13 10:22:25,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:22:25,819 INFO L225 Difference]: With dead ends: 338 [2020-10-13 10:22:25,820 INFO L226 Difference]: Without dead ends: 315 [2020-10-13 10:22:25,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:22:25,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-13 10:22:25,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 226. [2020-10-13 10:22:25,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-13 10:22:25,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 289 transitions. [2020-10-13 10:22:25,849 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 289 transitions. Word has length 36 [2020-10-13 10:22:25,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:22:25,849 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 289 transitions. [2020-10-13 10:22:25,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:22:25,849 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 289 transitions. [2020-10-13 10:22:25,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:22:25,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:22:25,850 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] [2020-10-13 10:22:25,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 10:22:25,851 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:22:25,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:22:25,851 INFO L82 PathProgramCache]: Analyzing trace with hash 582077482, now seen corresponding path program 1 times [2020-10-13 10:22:25,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:22:25,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107084708] [2020-10-13 10:22:25,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:22:25,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:25,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:25,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:26,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:26,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:26,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:27,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:27,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:27,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:28,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:29,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:29,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:22:29,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 10:22:29,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3235 [2020-10-13 10:22:29,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:29,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:22:29,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:22:29,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:22:29,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:22:29,507 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2020-10-13 10:22:29,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:22:29,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:29,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:29,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:29,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:22:29,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:22:29,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:22:29,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:29,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:22:29,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:22:29,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:22:29,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:22:29,758 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:22:29,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107084708] [2020-10-13 10:22:29,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:22:29,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:22:29,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456561116] [2020-10-13 10:22:29,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:22:29,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:22:29,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:22:29,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:22:29,761 INFO L87 Difference]: Start difference. First operand 226 states and 289 transitions. Second operand 12 states. [2020-10-13 10:22:30,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:22:30,845 INFO L93 Difference]: Finished difference Result 276 states and 347 transitions. [2020-10-13 10:22:30,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:22:30,845 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-13 10:22:30,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:22:30,848 INFO L225 Difference]: With dead ends: 276 [2020-10-13 10:22:30,848 INFO L226 Difference]: Without dead ends: 253 [2020-10-13 10:22:30,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:22:30,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-13 10:22:30,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 196. [2020-10-13 10:22:30,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-13 10:22:30,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 254 transitions. [2020-10-13 10:22:30,872 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 254 transitions. Word has length 37 [2020-10-13 10:22:30,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:22:30,873 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 254 transitions. [2020-10-13 10:22:30,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:22:30,873 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 254 transitions. [2020-10-13 10:22:30,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:22:30,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:22:30,874 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:22:30,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 10:22:30,874 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:22:30,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:22:30,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1333999382, now seen corresponding path program 1 times [2020-10-13 10:22:30,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:22:30,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892597803] [2020-10-13 10:22:30,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:22:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:30,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:31,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:31,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:31,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:31,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:31,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:31,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:31,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:31,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:32,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:32,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:32,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:33,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:33,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:33,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:33,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:33,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:33,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:34,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:34,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:35,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:35,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:35,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:22:35,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-13 10:22:35,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 10:22:35,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:35,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:22:35,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:22:35,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:22:35,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:36,280 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-13 10:22:36,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:22:36,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:36,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:36,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:36,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:22:36,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:22:36,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:22:36,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:36,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:22:36,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:22:36,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:22:36,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:36,524 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:22:36,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892597803] [2020-10-13 10:22:36,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:22:36,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:22:36,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612168798] [2020-10-13 10:22:36,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:22:36,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:22:36,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:22:36,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:22:36,526 INFO L87 Difference]: Start difference. First operand 196 states and 254 transitions. Second operand 16 states. [2020-10-13 10:22:37,020 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-10-13 10:22:38,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:22:38,743 INFO L93 Difference]: Finished difference Result 444 states and 566 transitions. [2020-10-13 10:22:38,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 10:22:38,743 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-13 10:22:38,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:22:38,745 INFO L225 Difference]: With dead ends: 444 [2020-10-13 10:22:38,746 INFO L226 Difference]: Without dead ends: 425 [2020-10-13 10:22:38,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:22:38,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2020-10-13 10:22:38,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 244. [2020-10-13 10:22:38,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-13 10:22:38,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 319 transitions. [2020-10-13 10:22:38,779 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 319 transitions. Word has length 37 [2020-10-13 10:22:38,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:22:38,779 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 319 transitions. [2020-10-13 10:22:38,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:22:38,779 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 319 transitions. [2020-10-13 10:22:38,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:22:38,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:22:38,780 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] [2020-10-13 10:22:38,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 10:22:38,781 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:22:38,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:22:38,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1184113510, now seen corresponding path program 2 times [2020-10-13 10:22:38,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:22:38,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83267395] [2020-10-13 10:22:38,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:22:38,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:38,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:38,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:39,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:39,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:39,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:39,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:39,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:39,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:40,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:43,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:43,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:22:43,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 10:22:43,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 10:22:43,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:43,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:22:43,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:22:43,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 10:22:43,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:44,098 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 50 [2020-10-13 10:22:44,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:22:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:44,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:44,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:44,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:22:44,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:22:44,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:22:44,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:44,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:22:44,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:22:44,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:22:44,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:22:44,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83267395] [2020-10-13 10:22:44,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:22:44,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:22:44,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752003220] [2020-10-13 10:22:44,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:22:44,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:22:44,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:22:44,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:22:44,325 INFO L87 Difference]: Start difference. First operand 244 states and 319 transitions. Second operand 15 states. [2020-10-13 10:22:45,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:22:45,958 INFO L93 Difference]: Finished difference Result 343 states and 434 transitions. [2020-10-13 10:22:45,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:22:45,959 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-13 10:22:45,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:22:45,962 INFO L225 Difference]: With dead ends: 343 [2020-10-13 10:22:45,962 INFO L226 Difference]: Without dead ends: 341 [2020-10-13 10:22:45,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=212, Invalid=844, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:22:45,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-13 10:22:45,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 239. [2020-10-13 10:22:45,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-13 10:22:45,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 313 transitions. [2020-10-13 10:22:45,994 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 313 transitions. Word has length 37 [2020-10-13 10:22:45,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:22:45,995 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 313 transitions. [2020-10-13 10:22:45,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:22:45,995 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 313 transitions. [2020-10-13 10:22:45,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:22:45,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:22:45,996 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:22:45,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 10:22:45,996 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:22:45,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:22:45,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1396038996, now seen corresponding path program 1 times [2020-10-13 10:22:45,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:22:45,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883359554] [2020-10-13 10:22:45,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:22:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:46,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:46,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:46,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:46,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:46,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:46,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:46,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:46,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:46,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:47,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:47,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:47,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:48,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:48,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:48,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:48,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:48,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:48,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:48,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:49,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:49,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:51,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:51,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:22:51,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-13 10:22:51,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 10:22:51,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:51,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:22:51,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:22:51,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:22:51,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:51,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:22:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:51,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:51,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:51,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:22:51,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:22:51,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:22:51,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:51,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:22:51,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:22:51,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:22:51,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:51,552 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:22:51,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883359554] [2020-10-13 10:22:51,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:22:51,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:22:51,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067004602] [2020-10-13 10:22:51,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:22:51,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:22:51,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:22:51,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:22:51,554 INFO L87 Difference]: Start difference. First operand 239 states and 313 transitions. Second operand 16 states. [2020-10-13 10:22:52,662 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2020-10-13 10:22:52,828 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2020-10-13 10:22:53,780 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-13 10:22:54,006 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-10-13 10:22:54,720 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2020-10-13 10:22:55,402 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2020-10-13 10:22:55,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:22:55,845 INFO L93 Difference]: Finished difference Result 565 states and 712 transitions. [2020-10-13 10:22:55,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-13 10:22:55,846 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-13 10:22:55,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:22:55,850 INFO L225 Difference]: With dead ends: 565 [2020-10-13 10:22:55,850 INFO L226 Difference]: Without dead ends: 526 [2020-10-13 10:22:55,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1293 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=744, Invalid=3546, Unknown=0, NotChecked=0, Total=4290 [2020-10-13 10:22:55,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-10-13 10:22:55,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 262. [2020-10-13 10:22:55,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-13 10:22:55,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 344 transitions. [2020-10-13 10:22:55,887 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 344 transitions. Word has length 37 [2020-10-13 10:22:55,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:22:55,887 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 344 transitions. [2020-10-13 10:22:55,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:22:55,887 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 344 transitions. [2020-10-13 10:22:55,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:22:55,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:22:55,888 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] [2020-10-13 10:22:55,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 10:22:55,889 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:22:55,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:22:55,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1122073896, now seen corresponding path program 1 times [2020-10-13 10:22:55,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:22:55,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265225708] [2020-10-13 10:22:55,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:22:55,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:55,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:56,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:56,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:56,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:56,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:56,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:56,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:57,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:57,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:00,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:00,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:23:00,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 10:23:00,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 10:23:00,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:00,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:23:00,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:23:00,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 10:23:00,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:01,282 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-10-13 10:23:01,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:23:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:01,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:01,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:01,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:23:01,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:23:01,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:23:01,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:01,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:23:01,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:23:01,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:23:01,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:23:01,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265225708] [2020-10-13 10:23:01,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:23:01,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:23:01,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934500357] [2020-10-13 10:23:01,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:23:01,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:23:01,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:23:01,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:23:01,521 INFO L87 Difference]: Start difference. First operand 262 states and 344 transitions. Second operand 16 states. [2020-10-13 10:23:02,475 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-10-13 10:23:03,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:23:03,825 INFO L93 Difference]: Finished difference Result 473 states and 588 transitions. [2020-10-13 10:23:03,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 10:23:03,826 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-13 10:23:03,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:23:03,828 INFO L225 Difference]: With dead ends: 473 [2020-10-13 10:23:03,828 INFO L226 Difference]: Without dead ends: 471 [2020-10-13 10:23:03,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=384, Invalid=1596, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 10:23:03,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2020-10-13 10:23:03,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 266. [2020-10-13 10:23:03,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-13 10:23:03,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 349 transitions. [2020-10-13 10:23:03,861 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 349 transitions. Word has length 37 [2020-10-13 10:23:03,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:23:03,861 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 349 transitions. [2020-10-13 10:23:03,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:23:03,862 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 349 transitions. [2020-10-13 10:23:03,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:23:03,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:23:03,863 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:23:03,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 10:23:03,863 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:23:03,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:23:03,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1465715246, now seen corresponding path program 1 times [2020-10-13 10:23:03,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:23:03,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603385971] [2020-10-13 10:23:03,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:23:03,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:03,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:03,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:04,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:04,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:04,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:04,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:05,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:05,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:23:05,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:23:05,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1622 [2020-10-13 10:23:05,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:05,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:23:05,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:23:05,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 10:23:05,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:05,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:23:05,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:05,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:05,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:05,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:23:05,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:23:05,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:23:05,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:05,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:23:05,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:23:05,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:23:05,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:05,893 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:23:05,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603385971] [2020-10-13 10:23:05,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:23:05,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:23:05,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820838570] [2020-10-13 10:23:05,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:23:05,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:23:05,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:23:05,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:23:05,894 INFO L87 Difference]: Start difference. First operand 266 states and 349 transitions. Second operand 12 states. [2020-10-13 10:23:06,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:23:06,740 INFO L93 Difference]: Finished difference Result 434 states and 559 transitions. [2020-10-13 10:23:06,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:23:06,741 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-13 10:23:06,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:23:06,744 INFO L225 Difference]: With dead ends: 434 [2020-10-13 10:23:06,744 INFO L226 Difference]: Without dead ends: 402 [2020-10-13 10:23:06,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:23:06,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-10-13 10:23:06,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 259. [2020-10-13 10:23:06,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-13 10:23:06,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 343 transitions. [2020-10-13 10:23:06,782 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 343 transitions. Word has length 38 [2020-10-13 10:23:06,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:23:06,782 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 343 transitions. [2020-10-13 10:23:06,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:23:06,783 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 343 transitions. [2020-10-13 10:23:06,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:23:06,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:23:06,784 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:23:06,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 10:23:06,784 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:23:06,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:23:06,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1403675632, now seen corresponding path program 1 times [2020-10-13 10:23:06,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:23:06,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446532720] [2020-10-13 10:23:06,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:23:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:06,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:06,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:07,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:07,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:07,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:07,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:08,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:08,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:23:08,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:23:08,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1681 [2020-10-13 10:23:08,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:08,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:23:08,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:23:08,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 10:23:08,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:08,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:23:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:08,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:08,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:08,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:23:08,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:23:08,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:23:08,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:08,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:23:08,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:23:08,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:23:08,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:23:08,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446532720] [2020-10-13 10:23:08,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:23:08,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:23:08,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294795192] [2020-10-13 10:23:08,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:23:08,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:23:08,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:23:08,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:23:08,841 INFO L87 Difference]: Start difference. First operand 259 states and 343 transitions. Second operand 12 states. [2020-10-13 10:23:09,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:23:09,921 INFO L93 Difference]: Finished difference Result 438 states and 567 transitions. [2020-10-13 10:23:09,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:23:09,922 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-13 10:23:09,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:23:09,925 INFO L225 Difference]: With dead ends: 438 [2020-10-13 10:23:09,925 INFO L226 Difference]: Without dead ends: 410 [2020-10-13 10:23:09,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:23:09,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-10-13 10:23:09,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 225. [2020-10-13 10:23:09,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-10-13 10:23:09,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 296 transitions. [2020-10-13 10:23:09,959 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 296 transitions. Word has length 38 [2020-10-13 10:23:09,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:23:09,959 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 296 transitions. [2020-10-13 10:23:09,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:23:09,959 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 296 transitions. [2020-10-13 10:23:09,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 10:23:09,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:23:09,960 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-13 10:23:09,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 10:23:09,961 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:23:09,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:23:09,961 INFO L82 PathProgramCache]: Analyzing trace with hash 2006724574, now seen corresponding path program 3 times [2020-10-13 10:23:09,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:23:09,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594308113] [2020-10-13 10:23:09,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:23:10,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:10,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:10,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:11,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:12,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:12,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 10:23:12,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:23:12,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2446 [2020-10-13 10:23:12,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:12,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:23:12,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:23:12,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 10:23:12,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:12,861 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-13 10:23:13,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:23:13,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:13,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:13,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:13,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:23:13,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:23:13,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:23:13,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:13,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:23:13,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:23:13,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:23:13,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:23:13,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594308113] [2020-10-13 10:23:13,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:23:13,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:23:13,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939270176] [2020-10-13 10:23:13,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:23:13,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:23:13,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:23:13,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:23:13,358 INFO L87 Difference]: Start difference. First operand 225 states and 296 transitions. Second operand 15 states. [2020-10-13 10:23:14,038 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-10-13 10:23:14,311 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-13 10:23:14,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:23:14,932 INFO L93 Difference]: Finished difference Result 369 states and 471 transitions. [2020-10-13 10:23:14,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:23:14,933 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-13 10:23:14,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:23:14,934 INFO L225 Difference]: With dead ends: 369 [2020-10-13 10:23:14,934 INFO L226 Difference]: Without dead ends: 341 [2020-10-13 10:23:14,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:23:14,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-13 10:23:14,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 243. [2020-10-13 10:23:14,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-13 10:23:14,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 324 transitions. [2020-10-13 10:23:14,972 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 324 transitions. Word has length 39 [2020-10-13 10:23:14,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:23:14,972 INFO L479 AbstractCegarLoop]: Abstraction has 243 states and 324 transitions. [2020-10-13 10:23:14,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:23:14,972 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 324 transitions. [2020-10-13 10:23:14,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 10:23:14,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:23:14,973 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-13 10:23:14,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 10:23:14,974 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:23:14,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:23:14,974 INFO L82 PathProgramCache]: Analyzing trace with hash 212006942, now seen corresponding path program 3 times [2020-10-13 10:23:14,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:23:14,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686155444] [2020-10-13 10:23:14,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:23:15,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:15,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:15,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:15,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:16,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:16,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:16,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:17,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:17,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:17,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:18,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:18,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 10:23:18,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 10:23:18,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3384 [2020-10-13 10:23:18,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:18,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:23:18,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:23:18,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:23:18,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:18,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:23:18,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:18,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:18,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:18,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:23:18,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:23:18,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:23:18,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:18,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:23:18,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:23:18,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:23:18,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:18,644 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:23:18,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686155444] [2020-10-13 10:23:18,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:23:18,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:23:18,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129021211] [2020-10-13 10:23:18,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:23:18,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:23:18,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:23:18,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:23:18,645 INFO L87 Difference]: Start difference. First operand 243 states and 324 transitions. Second operand 14 states. [2020-10-13 10:23:19,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:23:19,269 INFO L93 Difference]: Finished difference Result 339 states and 437 transitions. [2020-10-13 10:23:19,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:23:19,269 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-13 10:23:19,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:23:19,271 INFO L225 Difference]: With dead ends: 339 [2020-10-13 10:23:19,271 INFO L226 Difference]: Without dead ends: 299 [2020-10-13 10:23:19,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:23:19,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-13 10:23:19,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 174. [2020-10-13 10:23:19,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-13 10:23:19,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 230 transitions. [2020-10-13 10:23:19,307 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 230 transitions. Word has length 40 [2020-10-13 10:23:19,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:23:19,307 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 230 transitions. [2020-10-13 10:23:19,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:23:19,308 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 230 transitions. [2020-10-13 10:23:19,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 10:23:19,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:23:19,309 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:23:19,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 10:23:19,309 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:23:19,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:23:19,310 INFO L82 PathProgramCache]: Analyzing trace with hash 2012429466, now seen corresponding path program 2 times [2020-10-13 10:23:19,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:23:19,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992606470] [2020-10-13 10:23:19,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:23:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:19,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:19,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:19,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:20,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:20,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:20,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:21,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:23,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:23,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:24,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:24,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 10:23:24,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 10:23:24,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 10:23:24,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:24,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:23:24,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:23:24,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:23:24,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:24,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:23:24,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:24,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:24,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:24,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:23:24,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:23:24,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:23:24,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:24,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:23:24,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:23:24,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:23:24,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:23:24,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992606470] [2020-10-13 10:23:24,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:23:24,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:23:24,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826412599] [2020-10-13 10:23:24,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:23:24,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:23:24,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:23:24,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:23:24,626 INFO L87 Difference]: Start difference. First operand 174 states and 230 transitions. Second operand 12 states. [2020-10-13 10:23:25,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:23:25,458 INFO L93 Difference]: Finished difference Result 408 states and 522 transitions. [2020-10-13 10:23:25,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:23:25,459 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-13 10:23:25,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:23:25,460 INFO L225 Difference]: With dead ends: 408 [2020-10-13 10:23:25,460 INFO L226 Difference]: Without dead ends: 380 [2020-10-13 10:23:25,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:23:25,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-10-13 10:23:25,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 224. [2020-10-13 10:23:25,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-13 10:23:25,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 303 transitions. [2020-10-13 10:23:25,493 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 303 transitions. Word has length 40 [2020-10-13 10:23:25,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:23:25,493 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 303 transitions. [2020-10-13 10:23:25,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:23:25,493 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 303 transitions. [2020-10-13 10:23:25,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 10:23:25,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:23:25,494 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-13 10:23:25,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 10:23:25,494 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:23:25,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:23:25,494 INFO L82 PathProgramCache]: Analyzing trace with hash -505683426, now seen corresponding path program 4 times [2020-10-13 10:23:25,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:23:25,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081445362] [2020-10-13 10:23:25,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:23:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:25,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:25,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:26,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:26,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:27,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:27,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:27,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 10:23:27,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:23:27,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1879 [2020-10-13 10:23:27,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:27,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:23:27,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:23:27,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 10:23:27,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:27,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:23:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:27,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:27,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:27,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:23:27,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:23:27,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:23:27,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:27,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:23:27,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:23:27,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:23:27,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:23:27,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081445362] [2020-10-13 10:23:27,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:23:27,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:23:27,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578516780] [2020-10-13 10:23:27,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:23:27,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:23:27,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:23:27,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:23:27,830 INFO L87 Difference]: Start difference. First operand 224 states and 303 transitions. Second operand 14 states. [2020-10-13 10:23:28,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:23:28,811 INFO L93 Difference]: Finished difference Result 348 states and 456 transitions. [2020-10-13 10:23:28,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:23:28,812 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-13 10:23:28,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:23:28,814 INFO L225 Difference]: With dead ends: 348 [2020-10-13 10:23:28,814 INFO L226 Difference]: Without dead ends: 346 [2020-10-13 10:23:28,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:23:28,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-13 10:23:28,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 205. [2020-10-13 10:23:28,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-13 10:23:28,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 274 transitions. [2020-10-13 10:23:28,850 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 274 transitions. Word has length 40 [2020-10-13 10:23:28,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:23:28,851 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 274 transitions. [2020-10-13 10:23:28,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:23:28,851 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 274 transitions. [2020-10-13 10:23:28,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 10:23:28,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:23:28,852 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:23:28,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 10:23:28,852 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:23:28,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:23:28,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1614320007, now seen corresponding path program 1 times [2020-10-13 10:23:28,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:23:28,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658766119] [2020-10-13 10:23:28,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:23:28,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:28,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:28,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:29,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:29,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:29,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:29,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:29,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:29,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:29,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:29,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:30,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:30,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:33,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:33,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 10:23:33,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 10:23:33,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 10:23:33,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:33,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:23:33,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:23:33,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 10:23:33,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:34,038 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 27 [2020-10-13 10:23:34,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:23:34,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:34,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:34,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:34,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:23:34,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:23:34,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:23:34,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:34,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:23:34,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:23:34,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:23:34,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:34,267 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:23:34,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658766119] [2020-10-13 10:23:34,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:23:34,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:23:34,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597707438] [2020-10-13 10:23:34,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:23:34,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:23:34,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:23:34,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:23:34,268 INFO L87 Difference]: Start difference. First operand 205 states and 274 transitions. Second operand 11 states. [2020-10-13 10:23:34,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:23:34,931 INFO L93 Difference]: Finished difference Result 319 states and 416 transitions. [2020-10-13 10:23:34,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:23:34,932 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-10-13 10:23:34,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:23:34,933 INFO L225 Difference]: With dead ends: 319 [2020-10-13 10:23:34,934 INFO L226 Difference]: Without dead ends: 291 [2020-10-13 10:23:34,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:23:34,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-13 10:23:34,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 243. [2020-10-13 10:23:34,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-13 10:23:34,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 318 transitions. [2020-10-13 10:23:34,970 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 318 transitions. Word has length 43 [2020-10-13 10:23:34,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:23:34,970 INFO L479 AbstractCegarLoop]: Abstraction has 243 states and 318 transitions. [2020-10-13 10:23:34,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:23:34,971 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 318 transitions. [2020-10-13 10:23:34,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 10:23:34,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:23:34,972 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:23:34,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 10:23:34,972 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:23:34,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:23:34,972 INFO L82 PathProgramCache]: Analyzing trace with hash -813977597, now seen corresponding path program 4 times [2020-10-13 10:23:34,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:23:34,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836077454] [2020-10-13 10:23:34,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:23:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:34,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:35,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:35,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:35,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:35,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 10:23:35,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:23:35,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-13 10:23:35,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:35,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:23:35,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:23:35,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:23:35,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:35,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:23:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:35,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:35,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:35,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:23:35,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:23:35,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:23:35,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:35,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:23:35,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:23:35,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:23:35,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:35,458 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:23:35,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836077454] [2020-10-13 10:23:35,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:23:35,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:23:35,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472647734] [2020-10-13 10:23:35,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:23:35,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:23:35,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:23:35,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:23:35,460 INFO L87 Difference]: Start difference. First operand 243 states and 318 transitions. Second operand 10 states. [2020-10-13 10:23:35,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:23:35,994 INFO L93 Difference]: Finished difference Result 321 states and 410 transitions. [2020-10-13 10:23:35,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:23:35,995 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-13 10:23:35,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:23:35,997 INFO L225 Difference]: With dead ends: 321 [2020-10-13 10:23:35,997 INFO L226 Difference]: Without dead ends: 217 [2020-10-13 10:23:35,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:23:35,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-13 10:23:36,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2020-10-13 10:23:36,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-13 10:23:36,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 283 transitions. [2020-10-13 10:23:36,026 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 283 transitions. Word has length 43 [2020-10-13 10:23:36,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:23:36,026 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 283 transitions. [2020-10-13 10:23:36,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:23:36,026 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 283 transitions. [2020-10-13 10:23:36,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 10:23:36,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:23:36,027 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:23:36,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 10:23:36,027 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:23:36,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:23:36,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1758328443, now seen corresponding path program 2 times [2020-10-13 10:23:36,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:23:36,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749409594] [2020-10-13 10:23:36,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:23:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:36,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:36,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:36,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:36,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:36,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:36,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:36,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:37,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:37,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:37,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:37,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:39,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:41,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:41,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 10:23:41,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 10:23:41,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 10:23:41,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:41,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:23:41,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:23:41,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 10:23:41,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:41,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:23:41,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:41,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:41,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:41,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:23:41,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:23:41,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:23:41,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:41,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:23:41,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:23:41,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:23:41,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:41,493 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:23:41,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749409594] [2020-10-13 10:23:41,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:23:41,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:23:41,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554073024] [2020-10-13 10:23:41,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:23:41,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:23:41,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:23:41,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:23:41,498 INFO L87 Difference]: Start difference. First operand 217 states and 283 transitions. Second operand 13 states. [2020-10-13 10:23:42,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:23:42,456 INFO L93 Difference]: Finished difference Result 328 states and 425 transitions. [2020-10-13 10:23:42,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:23:42,456 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-10-13 10:23:42,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:23:42,458 INFO L225 Difference]: With dead ends: 328 [2020-10-13 10:23:42,458 INFO L226 Difference]: Without dead ends: 300 [2020-10-13 10:23:42,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:23:42,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-10-13 10:23:42,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 261. [2020-10-13 10:23:42,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-13 10:23:42,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 339 transitions. [2020-10-13 10:23:42,495 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 339 transitions. Word has length 46 [2020-10-13 10:23:42,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:23:42,495 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 339 transitions. [2020-10-13 10:23:42,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:23:42,495 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 339 transitions. [2020-10-13 10:23:42,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 10:23:42,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:23:42,496 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:23:42,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 10:23:42,496 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:23:42,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:23:42,496 INFO L82 PathProgramCache]: Analyzing trace with hash -669969161, now seen corresponding path program 5 times [2020-10-13 10:23:42,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:23:42,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631369594] [2020-10-13 10:23:42,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:23:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:42,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:42,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:43,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:44,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:44,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 10:23:44,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:23:44,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1575 [2020-10-13 10:23:44,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:44,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:23:44,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:23:44,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 10:23:44,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:44,435 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-10-13 10:23:44,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:23:44,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:44,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:44,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:44,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:23:44,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:23:44,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:23:44,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:44,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:23:44,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:23:44,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:23:44,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:44,839 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:23:44,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631369594] [2020-10-13 10:23:44,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:23:44,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:23:44,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837919860] [2020-10-13 10:23:44,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:23:44,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:23:44,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:23:44,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:23:44,841 INFO L87 Difference]: Start difference. First operand 261 states and 339 transitions. Second operand 16 states. [2020-10-13 10:23:45,260 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 60 [2020-10-13 10:23:45,526 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 54 [2020-10-13 10:23:45,722 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 44 [2020-10-13 10:23:46,011 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2020-10-13 10:23:47,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:23:47,570 INFO L93 Difference]: Finished difference Result 490 states and 620 transitions. [2020-10-13 10:23:47,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:23:47,570 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-10-13 10:23:47,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:23:47,573 INFO L225 Difference]: With dead ends: 490 [2020-10-13 10:23:47,573 INFO L226 Difference]: Without dead ends: 462 [2020-10-13 10:23:47,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:23:47,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2020-10-13 10:23:47,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 366. [2020-10-13 10:23:47,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2020-10-13 10:23:47,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 466 transitions. [2020-10-13 10:23:47,656 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 466 transitions. Word has length 46 [2020-10-13 10:23:47,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:23:47,657 INFO L479 AbstractCegarLoop]: Abstraction has 366 states and 466 transitions. [2020-10-13 10:23:47,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:23:47,657 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 466 transitions. [2020-10-13 10:23:47,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 10:23:47,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:23:47,658 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:23:47,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 10:23:47,658 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:23:47,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:23:47,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1106885243, now seen corresponding path program 3 times [2020-10-13 10:23:47,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:23:47,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482676925] [2020-10-13 10:23:47,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:23:47,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:47,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:47,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:48,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:48,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:48,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:49,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:49,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:49,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:49,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:49,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:49,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 10:23:49,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 10:23:49,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2293 [2020-10-13 10:23:49,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:49,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:23:49,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:23:49,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 10:23:49,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:50,319 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-10-13 10:23:50,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:23:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:50,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:50,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:50,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:23:50,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:23:50,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:23:50,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:50,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:23:50,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:23:50,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:23:50,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:23:50,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482676925] [2020-10-13 10:23:50,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:23:50,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:23:50,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462045036] [2020-10-13 10:23:50,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:23:50,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:23:50,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:23:50,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:23:50,543 INFO L87 Difference]: Start difference. First operand 366 states and 466 transitions. Second operand 15 states. [2020-10-13 10:23:51,164 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-10-13 10:23:52,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:23:52,131 INFO L93 Difference]: Finished difference Result 492 states and 623 transitions. [2020-10-13 10:23:52,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:23:52,132 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2020-10-13 10:23:52,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:23:52,133 INFO L225 Difference]: With dead ends: 492 [2020-10-13 10:23:52,133 INFO L226 Difference]: Without dead ends: 452 [2020-10-13 10:23:52,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:23:52,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-10-13 10:23:52,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 334. [2020-10-13 10:23:52,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-10-13 10:23:52,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 430 transitions. [2020-10-13 10:23:52,184 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 430 transitions. Word has length 46 [2020-10-13 10:23:52,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:23:52,184 INFO L479 AbstractCegarLoop]: Abstraction has 334 states and 430 transitions. [2020-10-13 10:23:52,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:23:52,184 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 430 transitions. [2020-10-13 10:23:52,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 10:23:52,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:23:52,185 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:23:52,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 10:23:52,185 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:23:52,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:23:52,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1981990837, now seen corresponding path program 3 times [2020-10-13 10:23:52,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:23:52,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097150511] [2020-10-13 10:23:52,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:23:52,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:52,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:52,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:52,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:52,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:53,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:54,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:54,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:54,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:54,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:55,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:55,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:55,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:55,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:56,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:57,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:57,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:57,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:57,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 10:23:57,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 10:23:57,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 10:23:57,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:57,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:23:57,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:23:57,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 10:23:57,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:57,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:23:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:57,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:57,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:57,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:23:57,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:23:57,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:23:57,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:57,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:23:57,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:23:57,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:23:57,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:23:57,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097150511] [2020-10-13 10:23:57,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:23:57,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:23:57,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511212616] [2020-10-13 10:23:57,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:23:57,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:23:57,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:23:57,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:23:57,742 INFO L87 Difference]: Start difference. First operand 334 states and 430 transitions. Second operand 13 states. [2020-10-13 10:23:59,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:23:59,223 INFO L93 Difference]: Finished difference Result 584 states and 736 transitions. [2020-10-13 10:23:59,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:23:59,223 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-10-13 10:23:59,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:23:59,225 INFO L225 Difference]: With dead ends: 584 [2020-10-13 10:23:59,226 INFO L226 Difference]: Without dead ends: 556 [2020-10-13 10:23:59,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:23:59,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2020-10-13 10:23:59,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 421. [2020-10-13 10:23:59,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-10-13 10:23:59,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 536 transitions. [2020-10-13 10:23:59,301 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 536 transitions. Word has length 47 [2020-10-13 10:23:59,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:23:59,301 INFO L479 AbstractCegarLoop]: Abstraction has 421 states and 536 transitions. [2020-10-13 10:23:59,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:23:59,301 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 536 transitions. [2020-10-13 10:23:59,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 10:23:59,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:23:59,302 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:23:59,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 10:23:59,302 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:23:59,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:23:59,302 INFO L82 PathProgramCache]: Analyzing trace with hash -205136433, now seen corresponding path program 5 times [2020-10-13 10:23:59,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:23:59,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089811871] [2020-10-13 10:23:59,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:23:59,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:59,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:59,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:59,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:59,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:00,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:01,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:24:01,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 10:24:01,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:24:01,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2675 [2020-10-13 10:24:01,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:24:01,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:24:01,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:24:01,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 10:24:01,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:24:02,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:24:02,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:24:02,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:02,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:24:02,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:24:02,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:24:02,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:24:02,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:24:02,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:24:02,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:24:02,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:24:02,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:24:02,391 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:24:02,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089811871] [2020-10-13 10:24:02,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:24:02,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:24:02,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984595492] [2020-10-13 10:24:02,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:24:02,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:24:02,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:24:02,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:24:02,392 INFO L87 Difference]: Start difference. First operand 421 states and 536 transitions. Second operand 13 states. [2020-10-13 10:24:03,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:24:03,775 INFO L93 Difference]: Finished difference Result 539 states and 674 transitions. [2020-10-13 10:24:03,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:24:03,776 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-10-13 10:24:03,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:24:03,779 INFO L225 Difference]: With dead ends: 539 [2020-10-13 10:24:03,779 INFO L226 Difference]: Without dead ends: 537 [2020-10-13 10:24:03,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:24:03,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2020-10-13 10:24:03,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 433. [2020-10-13 10:24:03,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2020-10-13 10:24:03,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 553 transitions. [2020-10-13 10:24:03,848 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 553 transitions. Word has length 47 [2020-10-13 10:24:03,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:24:03,848 INFO L479 AbstractCegarLoop]: Abstraction has 433 states and 553 transitions. [2020-10-13 10:24:03,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:24:03,848 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 553 transitions. [2020-10-13 10:24:03,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 10:24:03,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:24:03,849 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:24:03,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 10:24:03,850 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:24:03,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:24:03,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1241316615, now seen corresponding path program 3 times [2020-10-13 10:24:03,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:24:03,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993878426] [2020-10-13 10:24:03,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:24:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:24:03,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:04,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:04,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:04,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:05,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:05,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:05,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:06,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:06,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:07,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:08,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:08,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:08,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:24:08,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 10:24:08,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 10:24:08,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 10:24:08,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:24:08,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:24:08,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:24:08,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:24:08,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:24:09,270 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-10-13 10:24:09,486 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-13 10:24:09,705 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2020-10-13 10:24:09,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:24:09,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:24:09,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:09,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:24:09,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:24:09,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:24:09,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:24:09,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:24:09,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:24:09,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:24:09,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:24:09,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:24:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:24:09,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993878426] [2020-10-13 10:24:09,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:24:09,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:24:09,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468721286] [2020-10-13 10:24:09,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:24:09,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:24:09,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:24:09,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:24:09,929 INFO L87 Difference]: Start difference. First operand 433 states and 553 transitions. Second operand 16 states. [2020-10-13 10:24:10,751 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 49 [2020-10-13 10:24:11,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:24:11,391 INFO L93 Difference]: Finished difference Result 610 states and 762 transitions. [2020-10-13 10:24:11,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:24:11,392 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-10-13 10:24:11,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:24:11,394 INFO L225 Difference]: With dead ends: 610 [2020-10-13 10:24:11,394 INFO L226 Difference]: Without dead ends: 582 [2020-10-13 10:24:11,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:24:11,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2020-10-13 10:24:11,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 474. [2020-10-13 10:24:11,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 474 states. [2020-10-13 10:24:11,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 603 transitions. [2020-10-13 10:24:11,563 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 603 transitions. Word has length 49 [2020-10-13 10:24:11,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:24:11,563 INFO L479 AbstractCegarLoop]: Abstraction has 474 states and 603 transitions. [2020-10-13 10:24:11,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:24:11,563 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 603 transitions. [2020-10-13 10:24:11,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 10:24:11,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:24:11,565 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:24:11,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 10:24:11,566 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:24:11,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:24:11,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1186980989, now seen corresponding path program 6 times [2020-10-13 10:24:11,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:24:11,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460403144] [2020-10-13 10:24:11,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:24:11,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:24:11,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:11,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:12,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:15,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:24:15,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 10:24:15,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:24:15,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3766 [2020-10-13 10:24:15,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:24:15,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:24:15,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:24:15,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 10:24:15,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:24:15,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:24:15,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:24:15,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:15,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:24:15,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:24:15,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:24:15,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:24:15,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:24:15,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:24:15,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:24:15,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:24:15,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:24:15,907 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:24:15,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460403144] [2020-10-13 10:24:15,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:24:15,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:24:15,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251988409] [2020-10-13 10:24:15,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:24:15,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:24:15,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:24:15,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:24:15,909 INFO L87 Difference]: Start difference. First operand 474 states and 603 transitions. Second operand 15 states. [2020-10-13 10:24:17,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:24:17,519 INFO L93 Difference]: Finished difference Result 843 states and 1063 transitions. [2020-10-13 10:24:17,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:24:17,519 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-10-13 10:24:17,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:24:17,523 INFO L225 Difference]: With dead ends: 843 [2020-10-13 10:24:17,523 INFO L226 Difference]: Without dead ends: 815 [2020-10-13 10:24:17,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:24:17,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2020-10-13 10:24:17,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 666. [2020-10-13 10:24:17,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 666 states. [2020-10-13 10:24:17,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 846 transitions. [2020-10-13 10:24:17,629 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 846 transitions. Word has length 49 [2020-10-13 10:24:17,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:24:17,630 INFO L479 AbstractCegarLoop]: Abstraction has 666 states and 846 transitions. [2020-10-13 10:24:17,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:24:17,630 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 846 transitions. [2020-10-13 10:24:17,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 10:24:17,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:24:17,632 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:24:17,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 10:24:17,632 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:24:17,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:24:17,633 INFO L82 PathProgramCache]: Analyzing trace with hash 589873415, now seen corresponding path program 4 times [2020-10-13 10:24:17,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:24:17,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123791806] [2020-10-13 10:24:17,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:24:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:24:17,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:17,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:18,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:19,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:19,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:19,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:20,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:21,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:21,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:22,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:24:22,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 10:24:22,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 10:24:22,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4936 [2020-10-13 10:24:22,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:24:22,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:24:22,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:24:22,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 10:24:22,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:24:22,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:24:22,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:24:22,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:22,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:24:22,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:24:22,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:24:22,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:24:22,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:24:22,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:24:22,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:24:22,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:24:22,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:24:23,004 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:24:23,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123791806] [2020-10-13 10:24:23,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:24:23,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:24:23,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787323277] [2020-10-13 10:24:23,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:24:23,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:24:23,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:24:23,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:24:23,005 INFO L87 Difference]: Start difference. First operand 666 states and 846 transitions. Second operand 14 states. [2020-10-13 10:24:24,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:24:24,279 INFO L93 Difference]: Finished difference Result 944 states and 1186 transitions. [2020-10-13 10:24:24,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:24:24,280 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-10-13 10:24:24,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:24:24,283 INFO L225 Difference]: With dead ends: 944 [2020-10-13 10:24:24,283 INFO L226 Difference]: Without dead ends: 896 [2020-10-13 10:24:24,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:24:24,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2020-10-13 10:24:24,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 717. [2020-10-13 10:24:24,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 717 states. [2020-10-13 10:24:24,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 925 transitions. [2020-10-13 10:24:24,401 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 925 transitions. Word has length 49 [2020-10-13 10:24:24,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:24:24,401 INFO L479 AbstractCegarLoop]: Abstraction has 717 states and 925 transitions. [2020-10-13 10:24:24,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:24:24,401 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 925 transitions. [2020-10-13 10:24:24,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 10:24:24,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:24:24,403 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:24:24,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 10:24:24,403 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:24:24,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:24:24,404 INFO L82 PathProgramCache]: Analyzing trace with hash -994039501, now seen corresponding path program 1 times [2020-10-13 10:24:24,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:24:24,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326138138] [2020-10-13 10:24:24,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:24:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:24:24,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:24,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:24,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:25,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:25,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:26,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:26,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:26,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:27,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:27,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:27,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:27,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:28,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:29,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:29,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:24:29,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 10:24:29,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 10:24:29,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 10:24:29,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:24:29,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:24:29,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:24:29,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 10:24:29,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:24:29,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:24:29,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:24:29,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:29,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:24:29,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:24:29,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:24:29,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:24:29,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:24:29,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:24:29,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:24:29,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:24:29,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:24:29,746 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:24:29,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326138138] [2020-10-13 10:24:29,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:24:29,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:24:29,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533588771] [2020-10-13 10:24:29,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:24:29,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:24:29,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:24:29,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:24:29,748 INFO L87 Difference]: Start difference. First operand 717 states and 925 transitions. Second operand 14 states. [2020-10-13 10:24:30,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:24:30,515 INFO L93 Difference]: Finished difference Result 899 states and 1133 transitions. [2020-10-13 10:24:30,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:24:30,516 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2020-10-13 10:24:30,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:24:30,519 INFO L225 Difference]: With dead ends: 899 [2020-10-13 10:24:30,519 INFO L226 Difference]: Without dead ends: 851 [2020-10-13 10:24:30,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:24:30,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2020-10-13 10:24:30,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 667. [2020-10-13 10:24:30,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 667 states. [2020-10-13 10:24:30,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 861 transitions. [2020-10-13 10:24:30,636 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 861 transitions. Word has length 50 [2020-10-13 10:24:30,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:24:30,637 INFO L479 AbstractCegarLoop]: Abstraction has 667 states and 861 transitions. [2020-10-13 10:24:30,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:24:30,637 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 861 transitions. [2020-10-13 10:24:30,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 10:24:30,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:24:30,638 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:24:30,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 10:24:30,639 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:24:30,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:24:30,639 INFO L82 PathProgramCache]: Analyzing trace with hash 872630191, now seen corresponding path program 4 times [2020-10-13 10:24:30,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:24:30,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353776311] [2020-10-13 10:24:30,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:24:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:24:30,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:30,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:31,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:31,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:31,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:32,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:33,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:33,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:34,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:35,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:35,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:24:35,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 10:24:35,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 10:24:35,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 10:24:35,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:24:35,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:24:35,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:24:35,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 10:24:35,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:24:36,003 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-10-13 10:24:36,158 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-13 10:24:36,449 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2020-10-13 10:24:37,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:24:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:24:37,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:37,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:24:37,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:24:37,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:24:37,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:24:37,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:24:37,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:24:37,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:24:37,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:24:37,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:24:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:24:37,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353776311] [2020-10-13 10:24:37,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:24:37,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:24:37,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999865500] [2020-10-13 10:24:37,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:24:37,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:24:37,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:24:37,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:24:37,119 INFO L87 Difference]: Start difference. First operand 667 states and 861 transitions. Second operand 22 states. [2020-10-13 10:24:37,917 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2020-10-13 10:24:38,101 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-13 10:24:38,450 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-13 10:24:38,659 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 70 [2020-10-13 10:24:39,216 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2020-10-13 10:24:39,730 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-10-13 10:24:40,045 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 92 [2020-10-13 10:24:41,563 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 52 [2020-10-13 10:24:41,833 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 50 [2020-10-13 10:24:42,000 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2020-10-13 10:24:42,344 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 55 [2020-10-13 10:24:42,517 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 52 [2020-10-13 10:24:42,993 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-10-13 10:24:43,213 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-10-13 10:24:43,666 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2020-10-13 10:24:44,219 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-13 10:24:45,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:24:45,548 INFO L93 Difference]: Finished difference Result 1287 states and 1604 transitions. [2020-10-13 10:24:45,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-13 10:24:45,549 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-13 10:24:45,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:24:45,554 INFO L225 Difference]: With dead ends: 1287 [2020-10-13 10:24:45,554 INFO L226 Difference]: Without dead ends: 1285 [2020-10-13 10:24:45,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1930 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1047, Invalid=5595, Unknown=0, NotChecked=0, Total=6642 [2020-10-13 10:24:45,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2020-10-13 10:24:45,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 715. [2020-10-13 10:24:45,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 715 states. [2020-10-13 10:24:45,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 932 transitions. [2020-10-13 10:24:45,676 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 932 transitions. Word has length 50 [2020-10-13 10:24:45,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:24:45,676 INFO L479 AbstractCegarLoop]: Abstraction has 715 states and 932 transitions. [2020-10-13 10:24:45,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:24:45,676 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 932 transitions. [2020-10-13 10:24:45,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 10:24:45,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:24:45,677 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:24:45,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 10:24:45,678 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:24:45,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:24:45,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1819096327, now seen corresponding path program 6 times [2020-10-13 10:24:45,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:24:45,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672316967] [2020-10-13 10:24:45,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:24:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:24:45,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:45,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:46,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:46,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:46,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:50,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:50,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:24:50,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 10:24:50,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:24:50,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 10:24:50,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:24:50,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:24:50,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:24:50,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 10:24:50,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:24:51,018 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-13 10:24:51,187 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-13 10:24:51,469 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-13 10:24:51,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:24:51,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:24:51,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:51,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:24:51,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:24:51,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:24:51,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:24:51,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:24:51,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:24:51,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:24:51,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:24:51,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:24:51,850 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:24:51,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672316967] [2020-10-13 10:24:51,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:24:51,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:24:51,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431004058] [2020-10-13 10:24:51,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:24:51,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:24:51,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:24:51,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:24:51,851 INFO L87 Difference]: Start difference. First operand 715 states and 932 transitions. Second operand 19 states. [2020-10-13 10:24:53,209 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-10-13 10:24:53,396 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 69 [2020-10-13 10:24:53,655 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2020-10-13 10:24:54,037 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 84 [2020-10-13 10:24:54,207 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-13 10:24:55,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:24:55,964 INFO L93 Difference]: Finished difference Result 1266 states and 1585 transitions. [2020-10-13 10:24:55,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 10:24:55,965 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2020-10-13 10:24:55,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:24:55,970 INFO L225 Difference]: With dead ends: 1266 [2020-10-13 10:24:55,970 INFO L226 Difference]: Without dead ends: 1160 [2020-10-13 10:24:55,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=397, Invalid=2359, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 10:24:55,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2020-10-13 10:24:56,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 798. [2020-10-13 10:24:56,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 798 states. [2020-10-13 10:24:56,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1022 transitions. [2020-10-13 10:24:56,158 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1022 transitions. Word has length 51 [2020-10-13 10:24:56,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:24:56,158 INFO L479 AbstractCegarLoop]: Abstraction has 798 states and 1022 transitions. [2020-10-13 10:24:56,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:24:56,158 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1022 transitions. [2020-10-13 10:24:56,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 10:24:56,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:24:56,160 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:24:56,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 10:24:56,160 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:24:56,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:24:56,161 INFO L82 PathProgramCache]: Analyzing trace with hash -42241923, now seen corresponding path program 7 times [2020-10-13 10:24:56,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:24:56,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326930315] [2020-10-13 10:24:56,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:24:56,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:24:56,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:56,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:56,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:57,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:57,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:00,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:01,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:01,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 10:25:01,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:25:01,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 10:25:01,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:01,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:25:01,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:25:01,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 10:25:01,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:01,583 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-13 10:25:01,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:25:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:01,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:01,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:01,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:25:01,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:01,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:25:01,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:01,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:25:01,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:25:01,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:25:01,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:25:01,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326930315] [2020-10-13 10:25:01,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:25:01,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:25:01,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372991535] [2020-10-13 10:25:01,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:25:01,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:25:01,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:25:01,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:25:01,981 INFO L87 Difference]: Start difference. First operand 798 states and 1022 transitions. Second operand 14 states. [2020-10-13 10:25:04,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:25:04,090 INFO L93 Difference]: Finished difference Result 1037 states and 1306 transitions. [2020-10-13 10:25:04,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:25:04,091 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-10-13 10:25:04,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:25:04,095 INFO L225 Difference]: With dead ends: 1037 [2020-10-13 10:25:04,095 INFO L226 Difference]: Without dead ends: 1035 [2020-10-13 10:25:04,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:25:04,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2020-10-13 10:25:04,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 782. [2020-10-13 10:25:04,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 782 states. [2020-10-13 10:25:04,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1001 transitions. [2020-10-13 10:25:04,232 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1001 transitions. Word has length 51 [2020-10-13 10:25:04,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:25:04,233 INFO L479 AbstractCegarLoop]: Abstraction has 782 states and 1001 transitions. [2020-10-13 10:25:04,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:25:04,233 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1001 transitions. [2020-10-13 10:25:04,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 10:25:04,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:25:04,234 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:25:04,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 10:25:04,235 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:25:04,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:25:04,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1733625481, now seen corresponding path program 7 times [2020-10-13 10:25:04,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:25:04,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931180946] [2020-10-13 10:25:04,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:25:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:04,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:05,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:06,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:09,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:09,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 10:25:09,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:25:09,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4827 [2020-10-13 10:25:09,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:09,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:25:09,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:25:09,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 10:25:09,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:09,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:25:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:09,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:09,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:09,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:25:09,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:09,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:25:09,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:09,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:25:09,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:25:09,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:25:09,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:25:09,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931180946] [2020-10-13 10:25:09,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:25:09,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:25:09,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259557544] [2020-10-13 10:25:09,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:25:09,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:25:09,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:25:09,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:25:09,928 INFO L87 Difference]: Start difference. First operand 782 states and 1001 transitions. Second operand 17 states. [2020-10-13 10:25:11,155 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-13 10:25:12,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:25:12,218 INFO L93 Difference]: Finished difference Result 924 states and 1173 transitions. [2020-10-13 10:25:12,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:25:12,223 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2020-10-13 10:25:12,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:25:12,226 INFO L225 Difference]: With dead ends: 924 [2020-10-13 10:25:12,226 INFO L226 Difference]: Without dead ends: 905 [2020-10-13 10:25:12,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:25:12,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2020-10-13 10:25:12,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 626. [2020-10-13 10:25:12,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2020-10-13 10:25:12,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 800 transitions. [2020-10-13 10:25:12,347 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 800 transitions. Word has length 52 [2020-10-13 10:25:12,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:25:12,348 INFO L479 AbstractCegarLoop]: Abstraction has 626 states and 800 transitions. [2020-10-13 10:25:12,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:25:12,348 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 800 transitions. [2020-10-13 10:25:12,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 10:25:12,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:25:12,349 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:25:12,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 10:25:12,349 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:25:12,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:25:12,349 INFO L82 PathProgramCache]: Analyzing trace with hash -944957728, now seen corresponding path program 4 times [2020-10-13 10:25:12,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:25:12,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829448932] [2020-10-13 10:25:12,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:25:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:12,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:12,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:12,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:13,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:13,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:13,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:13,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:13,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:14,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:14,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:14,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:16,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:17,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:17,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 10:25:17,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 10:25:17,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 10:25:17,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:17,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:25:17,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:25:17,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 10:25:17,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:17,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:25:17,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:17,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:17,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:17,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:25:17,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:17,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:25:17,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:17,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:25:17,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:25:17,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:25:17,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:17,626 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:25:17,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829448932] [2020-10-13 10:25:17,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:25:17,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:25:17,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520921328] [2020-10-13 10:25:17,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:25:17,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:25:17,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:25:17,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:25:17,627 INFO L87 Difference]: Start difference. First operand 626 states and 800 transitions. Second operand 13 states. [2020-10-13 10:25:18,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:25:18,743 INFO L93 Difference]: Finished difference Result 789 states and 1004 transitions. [2020-10-13 10:25:18,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:25:18,744 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-10-13 10:25:18,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:25:18,747 INFO L225 Difference]: With dead ends: 789 [2020-10-13 10:25:18,747 INFO L226 Difference]: Without dead ends: 770 [2020-10-13 10:25:18,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:25:18,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2020-10-13 10:25:18,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 714. [2020-10-13 10:25:18,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 714 states. [2020-10-13 10:25:18,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 900 transitions. [2020-10-13 10:25:18,878 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 900 transitions. Word has length 56 [2020-10-13 10:25:18,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:25:18,878 INFO L479 AbstractCegarLoop]: Abstraction has 714 states and 900 transitions. [2020-10-13 10:25:18,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:25:18,879 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 900 transitions. [2020-10-13 10:25:18,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 10:25:18,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:25:18,880 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:25:18,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 10:25:18,880 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:25:18,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:25:18,880 INFO L82 PathProgramCache]: Analyzing trace with hash 921711964, now seen corresponding path program 8 times [2020-10-13 10:25:18,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:25:18,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93704898] [2020-10-13 10:25:18,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:25:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:18,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:19,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:19,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:20,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:20,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 10:25:20,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:25:20,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1799 [2020-10-13 10:25:20,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:20,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:25:20,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:25:20,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 10:25:20,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:20,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:25:20,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:20,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:20,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:20,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:25:20,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:20,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:25:20,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:20,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:25:20,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:25:20,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:25:20,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:20,927 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:25:20,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93704898] [2020-10-13 10:25:20,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:25:20,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:25:20,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122612625] [2020-10-13 10:25:20,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:25:20,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:25:20,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:25:20,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:25:20,928 INFO L87 Difference]: Start difference. First operand 714 states and 900 transitions. Second operand 13 states. [2020-10-13 10:25:21,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:25:21,870 INFO L93 Difference]: Finished difference Result 873 states and 1082 transitions. [2020-10-13 10:25:21,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:25:21,870 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-10-13 10:25:21,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:25:21,873 INFO L225 Difference]: With dead ends: 873 [2020-10-13 10:25:21,873 INFO L226 Difference]: Without dead ends: 556 [2020-10-13 10:25:21,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:25:21,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2020-10-13 10:25:21,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 542. [2020-10-13 10:25:21,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 542 states. [2020-10-13 10:25:21,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 690 transitions. [2020-10-13 10:25:21,976 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 690 transitions. Word has length 56 [2020-10-13 10:25:21,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:25:21,976 INFO L479 AbstractCegarLoop]: Abstraction has 542 states and 690 transitions. [2020-10-13 10:25:21,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:25:21,976 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 690 transitions. [2020-10-13 10:25:21,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 10:25:21,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:25:21,977 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:25:21,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 10:25:21,977 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:25:21,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:25:21,977 INFO L82 PathProgramCache]: Analyzing trace with hash 56516204, now seen corresponding path program 5 times [2020-10-13 10:25:21,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:25:21,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506897496] [2020-10-13 10:25:21,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:25:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:22,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:22,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:22,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:23,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:25,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:25,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:26,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:27,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:27,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 10:25:27,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 10:25:27,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 10:25:27,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:27,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:25:27,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:25:27,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 10:25:27,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:27,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:25:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:27,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:27,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:27,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:25:27,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:27,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:25:27,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:27,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:25:27,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:25:27,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:25:27,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:27,390 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:25:27,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506897496] [2020-10-13 10:25:27,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:25:27,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:25:27,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859790111] [2020-10-13 10:25:27,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:25:27,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:25:27,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:25:27,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:25:27,391 INFO L87 Difference]: Start difference. First operand 542 states and 690 transitions. Second operand 15 states. [2020-10-13 10:25:28,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:25:28,407 INFO L93 Difference]: Finished difference Result 583 states and 737 transitions. [2020-10-13 10:25:28,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:25:28,408 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 59 [2020-10-13 10:25:28,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:25:28,410 INFO L225 Difference]: With dead ends: 583 [2020-10-13 10:25:28,411 INFO L226 Difference]: Without dead ends: 564 [2020-10-13 10:25:28,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:25:28,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-10-13 10:25:28,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 542. [2020-10-13 10:25:28,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 542 states. [2020-10-13 10:25:28,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 689 transitions. [2020-10-13 10:25:28,521 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 689 transitions. Word has length 59 [2020-10-13 10:25:28,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:25:28,521 INFO L479 AbstractCegarLoop]: Abstraction has 542 states and 689 transitions. [2020-10-13 10:25:28,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:25:28,521 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 689 transitions. [2020-10-13 10:25:28,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 10:25:28,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:25:28,522 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:25:28,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 10:25:28,523 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:25:28,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:25:28,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1923185896, now seen corresponding path program 9 times [2020-10-13 10:25:28,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:25:28,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60002098] [2020-10-13 10:25:28,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:25:28,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:28,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:29,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking...