/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/heap-manipulation/merge_sort-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:28:03,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:28:03,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:28:03,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:28:03,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:28:03,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:28:03,343 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:28:03,345 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:28:03,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:28:03,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:28:03,348 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:28:03,350 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:28:03,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:28:03,354 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:28:03,357 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:28:03,358 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:28:03,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:28:03,360 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:28:03,364 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:28:03,366 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:28:03,370 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:28:03,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:28:03,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:28:03,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:28:03,379 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:28:03,379 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:28:03,379 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:28:03,382 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:28:03,383 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:28:03,385 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:28:03,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:28:03,386 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:28:03,388 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:28:03,389 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:28:03,390 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:28:03,390 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:28:03,391 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:28:03,391 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:28:03,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:28:03,392 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:28:03,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:28:03,394 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 10:28:03,448 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:28:03,450 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:28:03,452 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:28:03,452 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:28:03,452 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:28:03,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:28:03,453 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:28:03,454 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:28:03,454 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:28:03,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:28:03,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:28:03,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:28:03,455 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:28:03,455 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:28:03,456 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:28:03,456 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:28:03,457 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:28:03,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:28:03,457 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:28:03,457 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:28:03,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:28:03,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:28:03,458 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:28:03,458 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:28:03,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:28:03,458 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:28:03,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:28:03,459 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:28:03,459 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:28:03,459 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 10:28:03,786 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:28:03,799 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:28:03,803 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:28:03,804 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:28:03,805 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:28:03,805 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/merge_sort-2.i [2020-10-13 10:28:03,882 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9d8d2509d/d6bb5332c993478e9d76d0c54aed8272/FLAG422f9ea91 [2020-10-13 10:28:04,474 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:28:04,480 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/merge_sort-2.i [2020-10-13 10:28:04,499 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9d8d2509d/d6bb5332c993478e9d76d0c54aed8272/FLAG422f9ea91 [2020-10-13 10:28:04,755 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9d8d2509d/d6bb5332c993478e9d76d0c54aed8272 [2020-10-13 10:28:04,763 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:28:04,765 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:28:04,767 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:28:04,767 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:28:04,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:28:04,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:28:04" (1/1) ... [2020-10-13 10:28:04,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@263e4b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:28:04, skipping insertion in model container [2020-10-13 10:28:04,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:28:04" (1/1) ... [2020-10-13 10:28:04,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:28:04,851 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:28:05,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:28:05,317 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:28:05,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:28:05,423 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:28:05,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:28:05 WrapperNode [2020-10-13 10:28:05,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:28:05,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:28:05,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:28:05,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:28:05,439 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:28:05" (1/1) ... [2020-10-13 10:28:05,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:28:05" (1/1) ... [2020-10-13 10:28:05,459 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:28:05" (1/1) ... [2020-10-13 10:28:05,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:28:05" (1/1) ... [2020-10-13 10:28:05,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:28:05" (1/1) ... [2020-10-13 10:28:05,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:28:05" (1/1) ... [2020-10-13 10:28:05,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:28:05" (1/1) ... [2020-10-13 10:28:05,526 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:28:05,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:28:05,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:28:05,527 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:28:05,527 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:28:05" (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 10:28:05,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:28:05,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:28:05,591 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-13 10:28:05,591 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-13 10:28:05,591 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-10-13 10:28:05,591 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2020-10-13 10:28:05,591 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_pair [2020-10-13 10:28:05,592 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_sort_core [2020-10-13 10:28:05,592 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_before [2020-10-13 10:28:05,592 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_after [2020-10-13 10:28:05,592 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:28:05,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:28:05,592 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-13 10:28:05,593 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-13 10:28:05,593 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-13 10:28:05,593 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-13 10:28:05,593 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-13 10:28:05,593 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-13 10:28:05,593 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-13 10:28:05,594 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-13 10:28:05,594 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-13 10:28:05,594 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-13 10:28:05,594 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-13 10:28:05,594 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-13 10:28:05,594 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-13 10:28:05,595 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-13 10:28:05,595 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-13 10:28:05,595 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-13 10:28:05,595 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-13 10:28:05,595 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-13 10:28:05,595 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-13 10:28:05,595 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-13 10:28:05,596 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-13 10:28:05,596 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-13 10:28:05,596 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-13 10:28:05,596 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-13 10:28:05,596 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-13 10:28:05,597 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-13 10:28:05,597 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-13 10:28:05,597 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-13 10:28:05,597 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-13 10:28:05,597 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-13 10:28:05,597 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-13 10:28:05,597 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-13 10:28:05,598 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-13 10:28:05,598 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-13 10:28:05,598 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-13 10:28:05,598 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-13 10:28:05,598 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-13 10:28:05,598 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-13 10:28:05,598 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-13 10:28:05,599 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-13 10:28:05,599 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-13 10:28:05,599 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-13 10:28:05,599 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-13 10:28:05,599 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-13 10:28:05,599 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-13 10:28:05,600 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-13 10:28:05,600 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-13 10:28:05,600 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-13 10:28:05,600 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-13 10:28:05,600 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-13 10:28:05,600 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-13 10:28:05,600 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-13 10:28:05,601 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 10:28:05,601 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-13 10:28:05,601 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-13 10:28:05,601 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-13 10:28:05,601 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-13 10:28:05,601 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-13 10:28:05,602 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-13 10:28:05,602 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-13 10:28:05,602 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:28:05,602 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-13 10:28:05,602 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-13 10:28:05,602 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:28:05,602 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-13 10:28:05,603 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-13 10:28:05,603 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-13 10:28:05,603 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-13 10:28:05,603 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-13 10:28:05,603 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-13 10:28:05,603 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-13 10:28:05,604 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-13 10:28:05,604 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-13 10:28:05,604 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-13 10:28:05,604 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-13 10:28:05,604 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-13 10:28:05,604 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-13 10:28:05,604 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-13 10:28:05,605 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-13 10:28:05,605 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-13 10:28:05,605 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-13 10:28:05,605 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-13 10:28:05,605 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-13 10:28:05,605 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-13 10:28:05,605 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-13 10:28:05,606 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-13 10:28:05,606 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-13 10:28:05,606 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-13 10:28:05,606 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-13 10:28:05,606 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-13 10:28:05,606 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-13 10:28:05,606 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-13 10:28:05,607 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-13 10:28:05,607 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-13 10:28:05,607 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-13 10:28:05,607 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-13 10:28:05,607 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-13 10:28:05,607 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-13 10:28:05,607 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-13 10:28:05,608 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-13 10:28:05,608 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-13 10:28:05,608 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-13 10:28:05,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:28:05,608 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-10-13 10:28:05,608 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2020-10-13 10:28:05,608 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-13 10:28:05,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-13 10:28:05,609 INFO L130 BoogieDeclarations]: Found specification of procedure merge_pair [2020-10-13 10:28:05,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 10:28:05,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 10:28:05,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 10:28:05,609 INFO L130 BoogieDeclarations]: Found specification of procedure seq_sort_core [2020-10-13 10:28:05,609 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_before [2020-10-13 10:28:05,610 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_after [2020-10-13 10:28:05,610 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:28:05,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 10:28:05,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 10:28:05,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:28:05,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:28:06,411 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:28:06,411 INFO L295 CfgBuilder]: Removed 33 assume(true) statements. [2020-10-13 10:28:06,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:28:06 BoogieIcfgContainer [2020-10-13 10:28:06,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:28:06,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:28:06,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:28:06,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:28:06,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:28:04" (1/3) ... [2020-10-13 10:28:06,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c87f0ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:28:06, skipping insertion in model container [2020-10-13 10:28:06,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:28:05" (2/3) ... [2020-10-13 10:28:06,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c87f0ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:28:06, skipping insertion in model container [2020-10-13 10:28:06,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:28:06" (3/3) ... [2020-10-13 10:28:06,426 INFO L109 eAbstractionObserver]: Analyzing ICFG merge_sort-2.i [2020-10-13 10:28:06,436 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:28:06,445 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:28:06,460 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:28:06,500 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:28:06,501 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:28:06,501 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:28:06,501 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:28:06,501 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:28:06,501 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:28:06,502 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:28:06,502 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:28:06,524 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-10-13 10:28:06,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 10:28:06,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:28:06,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:28:06,532 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:28:06,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:28:06,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1873878464, now seen corresponding path program 1 times [2020-10-13 10:28:06,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:28:06,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858913377] [2020-10-13 10:28:06,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:28:06,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:06,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:06,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:06,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:06,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:06,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:28:06,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:28:06,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-13 10:28:06,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:06,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:06,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:28:06,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:06,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:28:07,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:28:07,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:07,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:07,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:07,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:28:07,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:07,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:28:07,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:07,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:07,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:07,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:07,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:07,025 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 10:28:07,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858913377] [2020-10-13 10:28:07,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:28:07,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:28:07,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543697176] [2020-10-13 10:28:07,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:28:07,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:28:07,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:28:07,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:28:07,051 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 3 states. [2020-10-13 10:28:07,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:28:07,307 INFO L93 Difference]: Finished difference Result 240 states and 408 transitions. [2020-10-13 10:28:07,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:28:07,309 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-13 10:28:07,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:28:07,324 INFO L225 Difference]: With dead ends: 240 [2020-10-13 10:28:07,324 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 10:28:07,330 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 10:28:07,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 10:28:07,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 103. [2020-10-13 10:28:07,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 10:28:07,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2020-10-13 10:28:07,392 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 13 [2020-10-13 10:28:07,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:28:07,392 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2020-10-13 10:28:07,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:28:07,393 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2020-10-13 10:28:07,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:28:07,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:28:07,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:28:07,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:28:07,394 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:28:07,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:28:07,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1323314826, now seen corresponding path program 1 times [2020-10-13 10:28:07,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:28:07,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58625756] [2020-10-13 10:28:07,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:28:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:07,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:07,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:07,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:07,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:28:07,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:28:07,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-13 10:28:07,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:07,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:28:07,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:28:07,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:28:07,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:07,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:28:07,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:07,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:07,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:07,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:28:07,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:07,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:28:07,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:07,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:07,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:07,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:07,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:07,582 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 10:28:07,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58625756] [2020-10-13 10:28:07,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:28:07,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:28:07,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911579148] [2020-10-13 10:28:07,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:28:07,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:28:07,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:28:07,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:28:07,593 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand 4 states. [2020-10-13 10:28:07,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:28:07,906 INFO L93 Difference]: Finished difference Result 206 states and 255 transitions. [2020-10-13 10:28:07,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:28:07,906 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-13 10:28:07,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:28:07,909 INFO L225 Difference]: With dead ends: 206 [2020-10-13 10:28:07,909 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 10:28:07,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:28:07,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 10:28:07,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2020-10-13 10:28:07,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-13 10:28:07,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2020-10-13 10:28:07,928 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 14 [2020-10-13 10:28:07,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:28:07,928 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2020-10-13 10:28:07,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:28:07,929 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2020-10-13 10:28:07,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:28:07,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:28:07,930 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:28:07,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:28:07,930 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:28:07,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:28:07,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1684995551, now seen corresponding path program 1 times [2020-10-13 10:28:07,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:28:07,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665921209] [2020-10-13 10:28:07,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:28:07,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:07,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:07,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:08,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:08,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:08,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:28:08,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:28:08,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 502 [2020-10-13 10:28:08,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:08,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:28:08,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 10:28:08,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:28:08,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:28:08,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:28:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:08,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:08,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:08,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:28:08,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:08,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:28:08,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:08,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:08,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:08,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:08,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:28:08,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665921209] [2020-10-13 10:28:08,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:28:08,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:28:08,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345370717] [2020-10-13 10:28:08,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:28:08,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:28:08,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:28:08,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:28:08,534 INFO L87 Difference]: Start difference. First operand 105 states and 128 transitions. Second operand 6 states. [2020-10-13 10:28:08,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:28:08,897 INFO L93 Difference]: Finished difference Result 124 states and 155 transitions. [2020-10-13 10:28:08,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:28:08,898 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-13 10:28:08,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:28:08,899 INFO L225 Difference]: With dead ends: 124 [2020-10-13 10:28:08,900 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 10:28:08,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:28:08,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 10:28:08,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 108. [2020-10-13 10:28:08,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 10:28:08,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 131 transitions. [2020-10-13 10:28:08,919 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 131 transitions. Word has length 20 [2020-10-13 10:28:08,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:28:08,920 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 131 transitions. [2020-10-13 10:28:08,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:28:08,920 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 131 transitions. [2020-10-13 10:28:08,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 10:28:08,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:28:08,921 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:28:08,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:28:08,921 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:28:08,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:28:08,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1145945773, now seen corresponding path program 1 times [2020-10-13 10:28:08,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:28:08,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389886281] [2020-10-13 10:28:08,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:28:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:08,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:08,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:09,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:09,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 10:28:09,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:28:09,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-13 10:28:09,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:09,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:28:09,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 10:28:09,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:28:09,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:09,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:28:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:09,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:09,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:09,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:28:09,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:09,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:28:09,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:09,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:09,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:09,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:09,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:09,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:28:09,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389886281] [2020-10-13 10:28:09,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:28:09,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:28:09,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910141930] [2020-10-13 10:28:09,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:28:09,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:28:09,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:28:09,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:28:09,305 INFO L87 Difference]: Start difference. First operand 108 states and 131 transitions. Second operand 6 states. [2020-10-13 10:28:09,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:28:09,650 INFO L93 Difference]: Finished difference Result 116 states and 141 transitions. [2020-10-13 10:28:09,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:28:09,651 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-13 10:28:09,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:28:09,652 INFO L225 Difference]: With dead ends: 116 [2020-10-13 10:28:09,653 INFO L226 Difference]: Without dead ends: 113 [2020-10-13 10:28:09,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:28:09,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-13 10:28:09,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 107. [2020-10-13 10:28:09,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-13 10:28:09,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions. [2020-10-13 10:28:09,665 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 27 [2020-10-13 10:28:09,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:28:09,666 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 129 transitions. [2020-10-13 10:28:09,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:28:09,666 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions. [2020-10-13 10:28:09,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 10:28:09,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:28:09,667 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:28:09,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:28:09,668 INFO L427 AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:28:09,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:28:09,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1471361763, now seen corresponding path program 1 times [2020-10-13 10:28:09,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:28:09,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554158511] [2020-10-13 10:28:09,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:28:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:09,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:09,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:09,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:09,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 10:28:09,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:28:09,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 292 [2020-10-13 10:28:09,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:09,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:28:09,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 10:28:09,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:28:09,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:28:10,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:28:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:10,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:10,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:10,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:28:10,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:10,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:28:10,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:10,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:10,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:10,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:10,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:28:10,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:28:10,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554158511] [2020-10-13 10:28:10,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:28:10,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:28:10,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151460689] [2020-10-13 10:28:10,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:28:10,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:28:10,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:28:10,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:28:10,061 INFO L87 Difference]: Start difference. First operand 107 states and 129 transitions. Second operand 6 states. [2020-10-13 10:28:10,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:28:10,503 INFO L93 Difference]: Finished difference Result 115 states and 139 transitions. [2020-10-13 10:28:10,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:28:10,504 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-13 10:28:10,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:28:10,506 INFO L225 Difference]: With dead ends: 115 [2020-10-13 10:28:10,506 INFO L226 Difference]: Without dead ends: 112 [2020-10-13 10:28:10,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:28:10,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-13 10:28:10,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2020-10-13 10:28:10,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 10:28:10,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions. [2020-10-13 10:28:10,519 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 27 [2020-10-13 10:28:10,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:28:10,519 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 127 transitions. [2020-10-13 10:28:10,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:28:10,519 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions. [2020-10-13 10:28:10,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:28:10,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:28:10,521 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:28:10,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:28:10,521 INFO L427 AbstractCegarLoop]: === Iteration 6 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:28:10,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:28:10,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1648323131, now seen corresponding path program 1 times [2020-10-13 10:28:10,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:28:10,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695250661] [2020-10-13 10:28:10,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:28:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:10,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:10,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:10,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:10,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:28:10,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:28:10,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 223 [2020-10-13 10:28:10,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:10,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:28:10,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:28:10,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:28:10,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:10,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:28:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:10,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:10,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:10,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:28:10,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:10,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:28:10,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:10,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:10,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:10,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:10,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:28:10,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695250661] [2020-10-13 10:28:10,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:28:10,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 10:28:10,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429635092] [2020-10-13 10:28:10,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:28:10,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:28:10,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:28:10,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:28:10,880 INFO L87 Difference]: Start difference. First operand 106 states and 127 transitions. Second operand 8 states. [2020-10-13 10:28:11,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:28:11,509 INFO L93 Difference]: Finished difference Result 147 states and 177 transitions. [2020-10-13 10:28:11,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:28:11,511 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-13 10:28:11,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:28:11,513 INFO L225 Difference]: With dead ends: 147 [2020-10-13 10:28:11,513 INFO L226 Difference]: Without dead ends: 144 [2020-10-13 10:28:11,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:28:11,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-13 10:28:11,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 112. [2020-10-13 10:28:11,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 10:28:11,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2020-10-13 10:28:11,525 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 30 [2020-10-13 10:28:11,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:28:11,526 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2020-10-13 10:28:11,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:28:11,526 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2020-10-13 10:28:11,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:28:11,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:28:11,527 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:28:11,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:28:11,527 INFO L427 AbstractCegarLoop]: === Iteration 7 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:28:11,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:28:11,528 INFO L82 PathProgramCache]: Analyzing trace with hash 861386650, now seen corresponding path program 1 times [2020-10-13 10:28:11,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:28:11,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053822725] [2020-10-13 10:28:11,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:28:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:11,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:11,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:11,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:11,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:12,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:12,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:28:12,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:28:12,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1163 [2020-10-13 10:28:12,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:12,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:28:12,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:28:12,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:28:12,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:28:12,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:28:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:12,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:12,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:12,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:28:12,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:12,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:28:12,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:12,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:12,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:12,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:12,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:28:12,831 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 10:28:12,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053822725] [2020-10-13 10:28:12,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:28:12,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:28:12,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084177787] [2020-10-13 10:28:12,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:28:12,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:28:12,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:28:12,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:28:12,834 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand 8 states. [2020-10-13 10:28:13,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:28:13,451 INFO L93 Difference]: Finished difference Result 235 states and 284 transitions. [2020-10-13 10:28:13,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:28:13,452 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-13 10:28:13,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:28:13,454 INFO L225 Difference]: With dead ends: 235 [2020-10-13 10:28:13,454 INFO L226 Difference]: Without dead ends: 151 [2020-10-13 10:28:13,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:28:13,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-13 10:28:13,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 138. [2020-10-13 10:28:13,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-13 10:28:13,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 161 transitions. [2020-10-13 10:28:13,480 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 161 transitions. Word has length 30 [2020-10-13 10:28:13,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:28:13,481 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 161 transitions. [2020-10-13 10:28:13,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:28:13,481 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 161 transitions. [2020-10-13 10:28:13,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 10:28:13,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:28:13,485 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:28:13,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:28:13,486 INFO L427 AbstractCegarLoop]: === Iteration 8 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:28:13,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:28:13,487 INFO L82 PathProgramCache]: Analyzing trace with hash 671486784, now seen corresponding path program 1 times [2020-10-13 10:28:13,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:28:13,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12167209] [2020-10-13 10:28:13,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:28:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:13,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:13,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:13,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:28:13,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:13,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-13 10:28:13,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:13,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:28:13,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:28:13,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:28:13,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:28:13,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:28:13,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:13,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:13,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:13,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:28:13,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:13,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:28:13,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:13,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:13,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:13,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:13,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:13,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:28:13,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12167209] [2020-10-13 10:28:13,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:28:13,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 10:28:13,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491050021] [2020-10-13 10:28:13,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:28:13,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:28:13,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:28:13,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:28:13,803 INFO L87 Difference]: Start difference. First operand 138 states and 161 transitions. Second operand 9 states. [2020-10-13 10:28:14,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:28:14,540 INFO L93 Difference]: Finished difference Result 175 states and 209 transitions. [2020-10-13 10:28:14,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:28:14,540 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-13 10:28:14,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:28:14,544 INFO L225 Difference]: With dead ends: 175 [2020-10-13 10:28:14,544 INFO L226 Difference]: Without dead ends: 172 [2020-10-13 10:28:14,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:28:14,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-13 10:28:14,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 141. [2020-10-13 10:28:14,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-13 10:28:14,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 163 transitions. [2020-10-13 10:28:14,560 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 163 transitions. Word has length 33 [2020-10-13 10:28:14,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:28:14,561 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 163 transitions. [2020-10-13 10:28:14,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:28:14,561 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 163 transitions. [2020-10-13 10:28:14,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:28:14,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:28:14,562 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] [2020-10-13 10:28:14,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:28:14,563 INFO L427 AbstractCegarLoop]: === Iteration 9 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:28:14,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:28:14,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1334119933, now seen corresponding path program 2 times [2020-10-13 10:28:14,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:28:14,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379389407] [2020-10-13 10:28:14,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:28:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:14,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:14,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:14,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:14,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 10:28:14,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:28:14,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-10-13 10:28:14,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:14,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:28:14,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 10:28:14,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:28:14,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:14,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:28:14,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:14,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:14,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:14,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:28:14,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:14,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:28:14,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:14,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:14,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:14,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:14,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:14,958 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:28:14,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379389407] [2020-10-13 10:28:14,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:28:14,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 10:28:14,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042811060] [2020-10-13 10:28:14,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:28:14,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:28:14,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:28:14,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:28:14,960 INFO L87 Difference]: Start difference. First operand 141 states and 163 transitions. Second operand 8 states. [2020-10-13 10:28:15,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:28:15,688 INFO L93 Difference]: Finished difference Result 169 states and 198 transitions. [2020-10-13 10:28:15,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:28:15,689 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-13 10:28:15,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:28:15,691 INFO L225 Difference]: With dead ends: 169 [2020-10-13 10:28:15,691 INFO L226 Difference]: Without dead ends: 166 [2020-10-13 10:28:15,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:28:15,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-13 10:28:15,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 147. [2020-10-13 10:28:15,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-13 10:28:15,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 169 transitions. [2020-10-13 10:28:15,706 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 169 transitions. Word has length 36 [2020-10-13 10:28:15,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:28:15,706 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 169 transitions. [2020-10-13 10:28:15,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:28:15,706 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 169 transitions. [2020-10-13 10:28:15,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 10:28:15,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:28:15,708 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:28:15,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:28:15,708 INFO L427 AbstractCegarLoop]: === Iteration 10 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:28:15,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:28:15,708 INFO L82 PathProgramCache]: Analyzing trace with hash 638254049, now seen corresponding path program 1 times [2020-10-13 10:28:15,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:28:15,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828433819] [2020-10-13 10:28:15,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:28:15,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:15,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:15,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:15,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 10:28:15,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:15,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-13 10:28:15,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:15,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:28:15,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 10:28:15,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:28:15,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:15,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:28:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:15,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:15,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:15,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:28:15,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:15,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:28:15,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:15,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:15,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:15,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:15,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:28:16,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:28:16,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828433819] [2020-10-13 10:28:16,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:28:16,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 10:28:16,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068183249] [2020-10-13 10:28:16,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:28:16,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:28:16,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:28:16,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:28:16,036 INFO L87 Difference]: Start difference. First operand 147 states and 169 transitions. Second operand 9 states. [2020-10-13 10:28:16,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:28:16,861 INFO L93 Difference]: Finished difference Result 173 states and 204 transitions. [2020-10-13 10:28:16,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:28:16,861 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-10-13 10:28:16,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:28:16,863 INFO L225 Difference]: With dead ends: 173 [2020-10-13 10:28:16,863 INFO L226 Difference]: Without dead ends: 170 [2020-10-13 10:28:16,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:28:16,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-13 10:28:16,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 150. [2020-10-13 10:28:16,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-13 10:28:16,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 172 transitions. [2020-10-13 10:28:16,881 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 172 transitions. Word has length 39 [2020-10-13 10:28:16,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:28:16,881 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 172 transitions. [2020-10-13 10:28:16,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:28:16,882 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 172 transitions. [2020-10-13 10:28:16,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 10:28:16,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:28:16,884 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:28:16,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:28:16,884 INFO L427 AbstractCegarLoop]: === Iteration 11 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:28:16,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:28:16,885 INFO L82 PathProgramCache]: Analyzing trace with hash 235623500, now seen corresponding path program 1 times [2020-10-13 10:28:16,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:28:16,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367884497] [2020-10-13 10:28:16,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:28:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:16,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:16,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:16,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:16,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:16,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:17,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:17,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 10:28:17,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:28:17,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 976 [2020-10-13 10:28:17,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:17,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:28:17,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:28:17,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 10:28:17,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:28:17,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:28:17,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:17,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:17,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:17,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:28:17,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:17,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:28:17,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:17,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:17,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:17,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:17,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:28:17,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-13 10:28:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:17,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:17,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:17,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:17,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:28:17,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:28:17,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-13 10:28:17,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:17,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:28:17,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:17,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:28:17,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:28:18,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:28:18,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367884497] [2020-10-13 10:28:18,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:28:18,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 10:28:18,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973812057] [2020-10-13 10:28:18,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:28:18,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:28:18,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:28:18,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:28:18,055 INFO L87 Difference]: Start difference. First operand 150 states and 172 transitions. Second operand 8 states. [2020-10-13 10:28:18,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:28:18,739 INFO L93 Difference]: Finished difference Result 187 states and 218 transitions. [2020-10-13 10:28:18,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:28:18,739 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-13 10:28:18,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:28:18,742 INFO L225 Difference]: With dead ends: 187 [2020-10-13 10:28:18,743 INFO L226 Difference]: Without dead ends: 184 [2020-10-13 10:28:18,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:28:18,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-13 10:28:18,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 155. [2020-10-13 10:28:18,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-13 10:28:18,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 178 transitions. [2020-10-13 10:28:18,766 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 178 transitions. Word has length 41 [2020-10-13 10:28:18,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:28:18,766 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 178 transitions. [2020-10-13 10:28:18,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:28:18,766 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 178 transitions. [2020-10-13 10:28:18,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 10:28:18,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:28:18,769 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:28:18,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:28:18,769 INFO L427 AbstractCegarLoop]: === Iteration 12 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:28:18,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:28:18,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1351973035, now seen corresponding path program 1 times [2020-10-13 10:28:18,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:28:18,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838570] [2020-10-13 10:28:18,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:28:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:18,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:18,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:18,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:18,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:20,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:20,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 10:28:20,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:28:20,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1721 [2020-10-13 10:28:20,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:20,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:28:20,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 10:28:20,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:28:20,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:28:20,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:28:20,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:20,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:20,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:20,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:28:20,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:20,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:28:20,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:20,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:20,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:20,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:20,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:28:20,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-13 10:28:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:20,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:20,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:20,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:28:20,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:20,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:28:20,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:20,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:20,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:20,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:20,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:20,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:28:20,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838570] [2020-10-13 10:28:20,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:28:20,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 10:28:20,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559827514] [2020-10-13 10:28:20,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:28:20,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:28:20,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:28:20,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:28:20,607 INFO L87 Difference]: Start difference. First operand 155 states and 178 transitions. Second operand 8 states. [2020-10-13 10:28:21,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:28:21,126 INFO L93 Difference]: Finished difference Result 163 states and 188 transitions. [2020-10-13 10:28:21,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:28:21,127 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-10-13 10:28:21,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:28:21,128 INFO L225 Difference]: With dead ends: 163 [2020-10-13 10:28:21,128 INFO L226 Difference]: Without dead ends: 160 [2020-10-13 10:28:21,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:28:21,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-13 10:28:21,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 154. [2020-10-13 10:28:21,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-13 10:28:21,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 176 transitions. [2020-10-13 10:28:21,147 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 176 transitions. Word has length 44 [2020-10-13 10:28:21,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:28:21,148 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 176 transitions. [2020-10-13 10:28:21,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:28:21,148 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 176 transitions. [2020-10-13 10:28:21,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 10:28:21,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:28:21,150 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, 1, 1, 1, 1, 1, 1] [2020-10-13 10:28:21,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:28:21,151 INFO L427 AbstractCegarLoop]: === Iteration 13 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:28:21,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:28:21,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1494948946, now seen corresponding path program 1 times [2020-10-13 10:28:21,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:28:21,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812732204] [2020-10-13 10:28:21,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:28:21,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:21,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:21,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:21,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:21,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:22,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:22,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 10:28:22,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:28:22,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1495 [2020-10-13 10:28:22,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:22,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:28:22,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 10:28:22,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:28:22,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:22,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:28:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:22,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:22,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:22,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:28:22,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:22,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:28:22,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:22,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:22,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:22,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:22,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:22,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 10:28:22,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812732204] [2020-10-13 10:28:22,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:28:22,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:28:22,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674060422] [2020-10-13 10:28:22,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:28:22,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:28:22,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:28:22,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:28:22,767 INFO L87 Difference]: Start difference. First operand 154 states and 176 transitions. Second operand 6 states. [2020-10-13 10:28:23,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:28:23,177 INFO L93 Difference]: Finished difference Result 162 states and 186 transitions. [2020-10-13 10:28:23,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:28:23,177 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-10-13 10:28:23,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:28:23,179 INFO L225 Difference]: With dead ends: 162 [2020-10-13 10:28:23,179 INFO L226 Difference]: Without dead ends: 158 [2020-10-13 10:28:23,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:28:23,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-13 10:28:23,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 152. [2020-10-13 10:28:23,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-13 10:28:23,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 172 transitions. [2020-10-13 10:28:23,192 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 172 transitions. Word has length 44 [2020-10-13 10:28:23,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:28:23,192 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 172 transitions. [2020-10-13 10:28:23,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:28:23,192 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 172 transitions. [2020-10-13 10:28:23,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 10:28:23,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:28:23,193 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:28:23,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:28:23,194 INFO L427 AbstractCegarLoop]: === Iteration 14 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:28:23,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:28:23,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1691394343, now seen corresponding path program 1 times [2020-10-13 10:28:23,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:28:23,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745501024] [2020-10-13 10:28:23,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:28:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:23,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:23,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:23,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:23,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:23,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 10:28:23,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:28:23,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 427 [2020-10-13 10:28:23,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:23,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:28:23,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:28:23,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:28:23,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:23,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:28:23,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:23,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:23,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:23,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:28:23,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:23,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:28:23,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:23,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:23,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:23,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:23,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:23,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-13 10:28:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:23,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:23,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:23,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:28:23,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:23,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 10:28:23,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:23,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:28:23,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:23,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:28:23,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:23,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:28:23,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745501024] [2020-10-13 10:28:23,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:28:23,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-13 10:28:23,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852681627] [2020-10-13 10:28:23,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:28:23,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:28:23,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:28:23,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:28:23,801 INFO L87 Difference]: Start difference. First operand 152 states and 172 transitions. Second operand 10 states. [2020-10-13 10:28:24,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:28:24,615 INFO L93 Difference]: Finished difference Result 186 states and 213 transitions. [2020-10-13 10:28:24,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:28:24,616 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2020-10-13 10:28:24,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:28:24,617 INFO L225 Difference]: With dead ends: 186 [2020-10-13 10:28:24,618 INFO L226 Difference]: Without dead ends: 183 [2020-10-13 10:28:24,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:28:24,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-13 10:28:24,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 166. [2020-10-13 10:28:24,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-13 10:28:24,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 187 transitions. [2020-10-13 10:28:24,632 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 187 transitions. Word has length 47 [2020-10-13 10:28:24,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:28:24,632 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 187 transitions. [2020-10-13 10:28:24,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:28:24,632 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 187 transitions. [2020-10-13 10:28:24,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 10:28:24,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:28:24,633 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:28:24,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:28:24,634 INFO L427 AbstractCegarLoop]: === Iteration 15 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:28:24,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:28:24,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1821749989, now seen corresponding path program 1 times [2020-10-13 10:28:24,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:28:24,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842866041] [2020-10-13 10:28:24,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:28:24,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:24,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:24,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:24,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:24,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:24,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:25,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:25,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:25,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:26,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:29,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:29,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:29,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 10:28:29,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 10:28:29,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 10:28:29,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:29,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:28:29,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 10:28:29,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:28:29,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:29,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:28:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:29,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:29,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:29,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:28:29,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:29,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:28:29,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:29,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:29,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:29,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:29,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:29,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-13 10:28:29,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:29,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:29,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:29,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:28:29,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:29,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:28:29,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:29,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:29,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:29,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:29,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:29,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 10:28:29,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:29,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:29,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:29,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:28:29,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:29,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 10:28:29,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:29,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:28:29,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:28:29,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:28:29,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:29,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:28:29,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842866041] [2020-10-13 10:28:29,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:28:29,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:28:29,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795452434] [2020-10-13 10:28:29,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:28:29,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:28:29,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:28:29,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:28:29,844 INFO L87 Difference]: Start difference. First operand 166 states and 187 transitions. Second operand 11 states. [2020-10-13 10:28:30,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:28:30,717 INFO L93 Difference]: Finished difference Result 199 states and 226 transitions. [2020-10-13 10:28:30,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:28:30,718 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2020-10-13 10:28:30,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:28:30,719 INFO L225 Difference]: With dead ends: 199 [2020-10-13 10:28:30,719 INFO L226 Difference]: Without dead ends: 178 [2020-10-13 10:28:30,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:28:30,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-13 10:28:30,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 173. [2020-10-13 10:28:30,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-13 10:28:30,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 195 transitions. [2020-10-13 10:28:30,739 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 195 transitions. Word has length 50 [2020-10-13 10:28:30,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:28:30,739 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 195 transitions. [2020-10-13 10:28:30,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:28:30,739 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 195 transitions. [2020-10-13 10:28:30,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 10:28:30,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:28:30,740 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:28:30,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:28:30,741 INFO L427 AbstractCegarLoop]: === Iteration 16 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:28:30,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:28:30,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1200260978, now seen corresponding path program 1 times [2020-10-13 10:28:30,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:28:30,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427571135] [2020-10-13 10:28:30,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:28:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:30,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:30,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:30,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:30,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:30,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:31,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:31,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:31,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:31,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:33,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:35,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:35,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 10:28:35,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 10:28:35,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 10:28:35,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:35,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:28:35,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 10:28:35,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:28:35,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:35,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:28:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:35,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:35,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:35,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:28:35,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:35,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:28:35,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:35,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:35,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:35,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:35,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:35,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-13 10:28:35,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:35,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:35,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:35,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:28:35,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:35,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:28:35,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:35,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:35,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:35,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:35,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:35,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 10:28:35,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:35,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:35,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:35,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-13 10:28:35,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:35,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-13 10:28:35,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:35,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:28:35,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:28:35,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:28:35,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:35,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:28:35,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427571135] [2020-10-13 10:28:35,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:28:35,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 10:28:35,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690676436] [2020-10-13 10:28:35,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:28:35,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:28:35,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:28:35,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:28:35,949 INFO L87 Difference]: Start difference. First operand 173 states and 195 transitions. Second operand 9 states. [2020-10-13 10:28:36,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:28:36,652 INFO L93 Difference]: Finished difference Result 239 states and 276 transitions. [2020-10-13 10:28:36,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:28:36,652 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-10-13 10:28:36,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:28:36,654 INFO L225 Difference]: With dead ends: 239 [2020-10-13 10:28:36,654 INFO L226 Difference]: Without dead ends: 180 [2020-10-13 10:28:36,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:28:36,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-13 10:28:36,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 174. [2020-10-13 10:28:36,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-13 10:28:36,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 196 transitions. [2020-10-13 10:28:36,677 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 196 transitions. Word has length 51 [2020-10-13 10:28:36,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:28:36,678 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 196 transitions. [2020-10-13 10:28:36,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:28:36,678 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 196 transitions. [2020-10-13 10:28:36,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 10:28:36,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:28:36,679 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:28:36,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:28:36,679 INFO L427 AbstractCegarLoop]: === Iteration 17 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:28:36,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:28:36,679 INFO L82 PathProgramCache]: Analyzing trace with hash 532870687, now seen corresponding path program 1 times [2020-10-13 10:28:36,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:28:36,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104877811] [2020-10-13 10:28:36,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:28:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:36,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:36,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:37,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:37,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 10:28:37,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:28:37,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 542 [2020-10-13 10:28:37,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:37,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:28:37,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:28:37,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 10:28:37,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:37,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:28:37,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:37,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:37,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:37,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:28:37,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:37,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:28:37,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:37,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:37,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:37,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:37,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:37,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:28:37,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104877811] [2020-10-13 10:28:37,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:28:37,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:28:37,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353017261] [2020-10-13 10:28:37,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:28:37,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:28:37,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:28:37,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:28:37,564 INFO L87 Difference]: Start difference. First operand 174 states and 196 transitions. Second operand 13 states. [2020-10-13 10:28:39,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:28:39,125 INFO L93 Difference]: Finished difference Result 221 states and 255 transitions. [2020-10-13 10:28:39,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:28:39,125 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-10-13 10:28:39,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:28:39,127 INFO L225 Difference]: With dead ends: 221 [2020-10-13 10:28:39,128 INFO L226 Difference]: Without dead ends: 218 [2020-10-13 10:28:39,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:28:39,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-13 10:28:39,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 185. [2020-10-13 10:28:39,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-13 10:28:39,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 208 transitions. [2020-10-13 10:28:39,144 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 208 transitions. Word has length 50 [2020-10-13 10:28:39,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:28:39,144 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 208 transitions. [2020-10-13 10:28:39,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:28:39,144 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 208 transitions. [2020-10-13 10:28:39,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 10:28:39,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:28:39,145 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:28:39,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:28:39,145 INFO L427 AbstractCegarLoop]: === Iteration 18 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:28:39,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:28:39,146 INFO L82 PathProgramCache]: Analyzing trace with hash -254065794, now seen corresponding path program 1 times [2020-10-13 10:28:39,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:28:39,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033938099] [2020-10-13 10:28:39,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:28:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:39,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:39,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:39,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:39,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:41,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:41,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 10:28:41,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:28:41,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2084 [2020-10-13 10:28:41,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:41,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:28:41,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:28:41,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 10:28:41,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:41,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:28:41,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:41,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:41,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:41,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:28:41,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:41,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:28:41,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:41,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:41,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:41,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:41,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:28:41,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033938099] [2020-10-13 10:28:41,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:28:41,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:28:41,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070397062] [2020-10-13 10:28:41,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:28:41,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:28:41,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:28:41,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:28:41,691 INFO L87 Difference]: Start difference. First operand 185 states and 208 transitions. Second operand 13 states. [2020-10-13 10:28:43,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:28:43,182 INFO L93 Difference]: Finished difference Result 346 states and 399 transitions. [2020-10-13 10:28:43,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:28:43,184 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-10-13 10:28:43,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:28:43,186 INFO L225 Difference]: With dead ends: 346 [2020-10-13 10:28:43,186 INFO L226 Difference]: Without dead ends: 253 [2020-10-13 10:28:43,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:28:43,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-13 10:28:43,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 238. [2020-10-13 10:28:43,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-13 10:28:43,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 264 transitions. [2020-10-13 10:28:43,222 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 264 transitions. Word has length 50 [2020-10-13 10:28:43,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:28:43,222 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 264 transitions. [2020-10-13 10:28:43,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:28:43,223 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 264 transitions. [2020-10-13 10:28:43,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 10:28:43,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:28:43,224 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:28:43,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:28:43,224 INFO L427 AbstractCegarLoop]: === Iteration 19 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:28:43,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:28:43,225 INFO L82 PathProgramCache]: Analyzing trace with hash -596228507, now seen corresponding path program 1 times [2020-10-13 10:28:43,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:28:43,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914460991] [2020-10-13 10:28:43,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:28:43,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:43,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:43,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:43,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:43,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:43,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 10:28:43,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:28:43,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 525 [2020-10-13 10:28:43,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:43,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:28:43,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-13 10:28:43,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:28:43,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:43,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:28:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:43,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:43,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:43,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:28:43,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:43,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:28:43,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:43,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:43,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:43,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:43,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:43,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-13 10:28:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:43,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:43,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:43,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:28:43,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:43,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:28:43,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:43,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:43,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:43,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:43,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:28:43,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914460991] [2020-10-13 10:28:43,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:28:43,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:28:43,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860513712] [2020-10-13 10:28:43,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:28:43,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:28:43,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:28:43,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:28:43,825 INFO L87 Difference]: Start difference. First operand 238 states and 264 transitions. Second operand 6 states. [2020-10-13 10:28:44,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:28:44,131 INFO L93 Difference]: Finished difference Result 241 states and 267 transitions. [2020-10-13 10:28:44,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:28:44,131 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-13 10:28:44,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:28:44,133 INFO L225 Difference]: With dead ends: 241 [2020-10-13 10:28:44,133 INFO L226 Difference]: Without dead ends: 222 [2020-10-13 10:28:44,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:28:44,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-13 10:28:44,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 219. [2020-10-13 10:28:44,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-13 10:28:44,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 242 transitions. [2020-10-13 10:28:44,152 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 242 transitions. Word has length 53 [2020-10-13 10:28:44,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:28:44,152 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 242 transitions. [2020-10-13 10:28:44,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:28:44,152 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 242 transitions. [2020-10-13 10:28:44,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 10:28:44,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:28:44,153 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:28:44,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:28:44,154 INFO L427 AbstractCegarLoop]: === Iteration 20 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:28:44,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:28:44,154 INFO L82 PathProgramCache]: Analyzing trace with hash 389696732, now seen corresponding path program 1 times [2020-10-13 10:28:44,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:28:44,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292292034] [2020-10-13 10:28:44,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:28:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:44,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:44,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:44,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 10:28:44,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:44,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 284 [2020-10-13 10:28:44,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:44,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:28:44,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:28:44,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 10:28:44,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:44,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:28:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:44,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:44,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:44,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:28:44,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:44,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:28:44,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:44,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:44,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:44,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:44,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:44,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:28:44,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292292034] [2020-10-13 10:28:44,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:28:44,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:28:44,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375804778] [2020-10-13 10:28:44,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:28:44,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:28:44,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:28:44,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:28:44,823 INFO L87 Difference]: Start difference. First operand 219 states and 242 transitions. Second operand 13 states. [2020-10-13 10:28:46,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:28:46,757 INFO L93 Difference]: Finished difference Result 253 states and 285 transitions. [2020-10-13 10:28:46,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:28:46,758 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-10-13 10:28:46,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:28:46,761 INFO L225 Difference]: With dead ends: 253 [2020-10-13 10:28:46,761 INFO L226 Difference]: Without dead ends: 250 [2020-10-13 10:28:46,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:28:46,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-13 10:28:46,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 222. [2020-10-13 10:28:46,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-13 10:28:46,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 244 transitions. [2020-10-13 10:28:46,777 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 244 transitions. Word has length 53 [2020-10-13 10:28:46,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:28:46,778 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 244 transitions. [2020-10-13 10:28:46,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:28:46,778 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 244 transitions. [2020-10-13 10:28:46,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 10:28:46,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:28:46,779 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, 1, 1, 1, 1, 1] [2020-10-13 10:28:46,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:28:46,779 INFO L427 AbstractCegarLoop]: === Iteration 21 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:28:46,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:28:46,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1356476263, now seen corresponding path program 2 times [2020-10-13 10:28:46,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:28:46,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529331779] [2020-10-13 10:28:46,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:28:46,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:46,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:46,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:47,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:47,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 10:28:47,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:28:47,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 709 [2020-10-13 10:28:47,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:47,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:28:47,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 10:28:47,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 10:28:47,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:47,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:28:47,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:47,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:47,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:47,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:28:47,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:47,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:28:47,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:47,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:47,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:47,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:47,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:47,713 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:28:47,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529331779] [2020-10-13 10:28:47,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:28:47,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:28:47,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27969943] [2020-10-13 10:28:47,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:28:47,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:28:47,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:28:47,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:28:47,715 INFO L87 Difference]: Start difference. First operand 222 states and 244 transitions. Second operand 13 states. [2020-10-13 10:28:49,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:28:49,111 INFO L93 Difference]: Finished difference Result 252 states and 282 transitions. [2020-10-13 10:28:49,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:28:49,111 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-10-13 10:28:49,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:28:49,113 INFO L225 Difference]: With dead ends: 252 [2020-10-13 10:28:49,113 INFO L226 Difference]: Without dead ends: 249 [2020-10-13 10:28:49,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:28:49,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-13 10:28:49,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 229. [2020-10-13 10:28:49,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-13 10:28:49,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 251 transitions. [2020-10-13 10:28:49,131 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 251 transitions. Word has length 56 [2020-10-13 10:28:49,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:28:49,131 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 251 transitions. [2020-10-13 10:28:49,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:28:49,131 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 251 transitions. [2020-10-13 10:28:49,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 10:28:49,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:28:49,132 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:28:49,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:28:49,133 INFO L427 AbstractCegarLoop]: === Iteration 22 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:28:49,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:28:49,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1126296224, now seen corresponding path program 1 times [2020-10-13 10:28:49,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:28:49,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692864638] [2020-10-13 10:28:49,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:28:49,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:49,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:49,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:49,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:49,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:49,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:49,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:49,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:49,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:53,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:53,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:54,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:54,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 10:28:54,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 10:28:54,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 10:28:54,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:54,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:28:54,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 10:28:54,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:28:54,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:54,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:28:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:54,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:54,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:54,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:28:54,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:54,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:28:54,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:54,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:54,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:54,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:54,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:54,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-13 10:28:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:54,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:54,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:54,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:28:54,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:54,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:28:54,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:54,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:54,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:54,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:54,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:54,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 10:28:54,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:54,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:54,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:54,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:28:54,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:54,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-13 10:28:54,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:54,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:28:54,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:28:54,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:28:54,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:54,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-13 10:28:54,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:54,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:54,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:54,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 10:28:54,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:54,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 10:28:54,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:54,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:28:54,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-10-13 10:28:54,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:28:54,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:28:54,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:28:54,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692864638] [2020-10-13 10:28:54,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:28:54,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:28:54,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673310957] [2020-10-13 10:28:54,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:28:54,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:28:54,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:28:54,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:28:54,286 INFO L87 Difference]: Start difference. First operand 229 states and 251 transitions. Second operand 5 states. [2020-10-13 10:28:54,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:28:54,641 INFO L93 Difference]: Finished difference Result 280 states and 317 transitions. [2020-10-13 10:28:54,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:28:54,644 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2020-10-13 10:28:54,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:28:54,646 INFO L225 Difference]: With dead ends: 280 [2020-10-13 10:28:54,649 INFO L226 Difference]: Without dead ends: 231 [2020-10-13 10:28:54,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 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 10:28:54,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-13 10:28:54,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2020-10-13 10:28:54,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-13 10:28:54,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 252 transitions. [2020-10-13 10:28:54,682 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 252 transitions. Word has length 61 [2020-10-13 10:28:54,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:28:54,683 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 252 transitions. [2020-10-13 10:28:54,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:28:54,683 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 252 transitions. [2020-10-13 10:28:54,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 10:28:54,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:28:54,686 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:28:54,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:28:54,686 INFO L427 AbstractCegarLoop]: === Iteration 23 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:28:54,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:28:54,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1174526366, now seen corresponding path program 1 times [2020-10-13 10:28:54,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:28:54,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731901970] [2020-10-13 10:28:54,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:28:54,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:54,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:54,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:54,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:54,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:54,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:55,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:55,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:55,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:58,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:58,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:59,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:59,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 10:28:59,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 10:28:59,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 10:28:59,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:59,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:28:59,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:28:59,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:28:59,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:59,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:28:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:59,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:59,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:59,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:28:59,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:59,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:28:59,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:59,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:59,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:59,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:59,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:59,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-13 10:28:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:59,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:59,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:59,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:59,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:28:59,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:28:59,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-13 10:28:59,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:59,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:28:59,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:59,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:28:59,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:59,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 10:28:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:59,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:59,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:59,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:28:59,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:59,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 10:28:59,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:59,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:59,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 10:28:59,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:59,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:59,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-13 10:28:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:59,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:59,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:59,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 10:28:59,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:59,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:28:59,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:59,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:59,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:59,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:59,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:59,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:28:59,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731901970] [2020-10-13 10:28:59,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:28:59,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 10:28:59,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603720739] [2020-10-13 10:28:59,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:28:59,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:28:59,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:28:59,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:28:59,949 INFO L87 Difference]: Start difference. First operand 230 states and 252 transitions. Second operand 9 states. [2020-10-13 10:29:00,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:29:00,660 INFO L93 Difference]: Finished difference Result 283 states and 316 transitions. [2020-10-13 10:29:00,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:29:00,661 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-10-13 10:29:00,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:29:00,663 INFO L225 Difference]: With dead ends: 283 [2020-10-13 10:29:00,663 INFO L226 Difference]: Without dead ends: 185 [2020-10-13 10:29:00,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:29:00,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-13 10:29:00,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2020-10-13 10:29:00,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-13 10:29:00,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 203 transitions. [2020-10-13 10:29:00,677 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 203 transitions. Word has length 61 [2020-10-13 10:29:00,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:29:00,678 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 203 transitions. [2020-10-13 10:29:00,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:29:00,678 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 203 transitions. [2020-10-13 10:29:00,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 10:29:00,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:29:00,679 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2020-10-13 10:29:00,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 10:29:00,679 INFO L427 AbstractCegarLoop]: === Iteration 24 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:29:00,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:29:00,679 INFO L82 PathProgramCache]: Analyzing trace with hash -785116163, now seen corresponding path program 1 times [2020-10-13 10:29:00,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:29:00,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041983674] [2020-10-13 10:29:00,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:29:00,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:00,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:01,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:01,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 10:29:01,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:01,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 370 [2020-10-13 10:29:01,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:01,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:29:01,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 10:29:01,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 10:29:01,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:01,540 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-13 10:29:01,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:29:01,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:01,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:01,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:01,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:29:01,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:01,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:29:01,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:01,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:29:01,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:29:01,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:29:01,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:01,708 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:29:01,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041983674] [2020-10-13 10:29:01,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:29:01,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:29:01,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870066487] [2020-10-13 10:29:01,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:29:01,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:29:01,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:29:01,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:29:01,710 INFO L87 Difference]: Start difference. First operand 184 states and 203 transitions. Second operand 13 states. [2020-10-13 10:29:02,096 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2020-10-13 10:29:03,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:29:03,302 INFO L93 Difference]: Finished difference Result 201 states and 225 transitions. [2020-10-13 10:29:03,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:29:03,303 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2020-10-13 10:29:03,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:29:03,305 INFO L225 Difference]: With dead ends: 201 [2020-10-13 10:29:03,305 INFO L226 Difference]: Without dead ends: 198 [2020-10-13 10:29:03,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:29:03,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-13 10:29:03,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 187. [2020-10-13 10:29:03,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-13 10:29:03,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 206 transitions. [2020-10-13 10:29:03,319 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 206 transitions. Word has length 59 [2020-10-13 10:29:03,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:29:03,319 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 206 transitions. [2020-10-13 10:29:03,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:29:03,319 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 206 transitions. [2020-10-13 10:29:03,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 10:29:03,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:29:03,320 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, 1, 1, 1, 1, 1, 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 10:29:03,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 10:29:03,321 INFO L427 AbstractCegarLoop]: === Iteration 25 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:29:03,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:29:03,321 INFO L82 PathProgramCache]: Analyzing trace with hash 2076219253, now seen corresponding path program 1 times [2020-10-13 10:29:03,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:29:03,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772444395] [2020-10-13 10:29:03,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:29:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:03,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:03,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:03,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:03,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:03,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:03,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:03,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:03,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:03,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:04,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:08,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:08,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 10:29:08,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 10:29:08,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 10:29:08,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:08,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:29:08,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 10:29:08,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 10:29:08,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:08,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:29:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:08,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:08,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:08,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:29:08,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:08,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:29:08,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:08,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:29:08,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:29:08,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:29:08,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:08,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 10:29:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:08,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:08,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:08,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:08,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:08,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 10:29:08,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:29:08,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-13 10:29:08,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:08,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:29:08,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:29:08,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 10:29:08,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 10:29:08,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772444395] [2020-10-13 10:29:08,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:29:08,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:29:08,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431725384] [2020-10-13 10:29:08,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:29:08,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:29:08,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:29:08,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:29:08,536 INFO L87 Difference]: Start difference. First operand 187 states and 206 transitions. Second operand 8 states. [2020-10-13 10:29:09,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:29:09,094 INFO L93 Difference]: Finished difference Result 198 states and 219 transitions. [2020-10-13 10:29:09,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:29:09,095 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-13 10:29:09,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:29:09,097 INFO L225 Difference]: With dead ends: 198 [2020-10-13 10:29:09,097 INFO L226 Difference]: Without dead ends: 186 [2020-10-13 10:29:09,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:29:09,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-13 10:29:09,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 182. [2020-10-13 10:29:09,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-13 10:29:09,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 200 transitions. [2020-10-13 10:29:09,110 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 200 transitions. Word has length 67 [2020-10-13 10:29:09,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:29:09,110 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 200 transitions. [2020-10-13 10:29:09,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:29:09,111 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 200 transitions. [2020-10-13 10:29:09,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 10:29:09,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:29:09,112 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:29:09,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 10:29:09,112 INFO L427 AbstractCegarLoop]: === Iteration 26 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:29:09,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:29:09,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1880558461, now seen corresponding path program 2 times [2020-10-13 10:29:09,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:29:09,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888491786] [2020-10-13 10:29:09,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:29:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:09,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:09,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:09,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:09,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 10:29:09,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:29:09,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 622 [2020-10-13 10:29:09,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:09,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:29:09,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:29:09,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 10:29:09,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:10,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:29:10,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:10,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:10,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:10,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:29:10,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:10,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:29:10,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:10,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:29:10,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:29:10,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:29:10,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:10,340 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:29:10,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888491786] [2020-10-13 10:29:10,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:29:10,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:29:10,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845288847] [2020-10-13 10:29:10,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:29:10,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:29:10,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:29:10,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:29:10,342 INFO L87 Difference]: Start difference. First operand 182 states and 200 transitions. Second operand 17 states. [2020-10-13 10:29:11,068 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2020-10-13 10:29:13,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:29:13,391 INFO L93 Difference]: Finished difference Result 233 states and 262 transitions. [2020-10-13 10:29:13,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:29:13,391 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 70 [2020-10-13 10:29:13,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:29:13,394 INFO L225 Difference]: With dead ends: 233 [2020-10-13 10:29:13,394 INFO L226 Difference]: Without dead ends: 230 [2020-10-13 10:29:13,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:29:13,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-13 10:29:13,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 193. [2020-10-13 10:29:13,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-13 10:29:13,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 212 transitions. [2020-10-13 10:29:13,409 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 212 transitions. Word has length 70 [2020-10-13 10:29:13,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:29:13,410 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 212 transitions. [2020-10-13 10:29:13,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:29:13,410 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 212 transitions. [2020-10-13 10:29:13,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 10:29:13,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:29:13,411 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2020-10-13 10:29:13,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 10:29:13,411 INFO L427 AbstractCegarLoop]: === Iteration 27 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:29:13,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:29:13,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1627472354, now seen corresponding path program 3 times [2020-10-13 10:29:13,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:29:13,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718130443] [2020-10-13 10:29:13,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:29:13,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:13,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:13,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:14,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:14,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:17,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:17,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 10:29:17,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:29:17,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3715 [2020-10-13 10:29:17,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:17,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:29:17,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:29:17,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 10:29:17,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:17,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:29:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:17,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:17,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:17,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:29:17,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:17,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:29:17,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:17,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:29:17,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:29:17,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:29:17,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:17,940 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:29:17,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718130443] [2020-10-13 10:29:17,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:29:17,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:29:17,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570345321] [2020-10-13 10:29:17,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:29:17,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:29:17,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:29:17,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:29:17,942 INFO L87 Difference]: Start difference. First operand 193 states and 212 transitions. Second operand 17 states. [2020-10-13 10:29:18,622 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2020-10-13 10:29:20,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:29:20,603 INFO L93 Difference]: Finished difference Result 351 states and 394 transitions. [2020-10-13 10:29:20,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:29:20,604 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 70 [2020-10-13 10:29:20,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:29:20,605 INFO L225 Difference]: With dead ends: 351 [2020-10-13 10:29:20,605 INFO L226 Difference]: Without dead ends: 270 [2020-10-13 10:29:20,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:29:20,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-13 10:29:20,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 257. [2020-10-13 10:29:20,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-13 10:29:20,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 279 transitions. [2020-10-13 10:29:20,622 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 279 transitions. Word has length 70 [2020-10-13 10:29:20,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:29:20,622 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 279 transitions. [2020-10-13 10:29:20,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:29:20,622 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 279 transitions. [2020-10-13 10:29:20,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 10:29:20,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:29:20,623 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:29:20,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 10:29:20,624 INFO L427 AbstractCegarLoop]: === Iteration 28 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:29:20,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:29:20,624 INFO L82 PathProgramCache]: Analyzing trace with hash -325516296, now seen corresponding path program 2 times [2020-10-13 10:29:20,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:29:20,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815451986] [2020-10-13 10:29:20,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:29:20,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:20,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:21,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:21,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 10:29:21,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:21,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 680 [2020-10-13 10:29:21,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:21,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:29:21,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:29:21,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 10:29:21,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:21,834 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-13 10:29:22,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:29:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:22,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:22,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:22,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:29:22,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:22,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:29:22,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:22,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:29:22,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:29:22,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:29:22,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:22,216 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 10:29:22,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815451986] [2020-10-13 10:29:22,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:29:22,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:29:22,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025182746] [2020-10-13 10:29:22,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:29:22,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:29:22,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:29:22,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:29:22,218 INFO L87 Difference]: Start difference. First operand 257 states and 279 transitions. Second operand 17 states. [2020-10-13 10:29:22,508 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2020-10-13 10:29:22,735 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-10-13 10:29:22,993 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 94 [2020-10-13 10:29:23,189 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-10-13 10:29:23,558 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 102 [2020-10-13 10:29:23,920 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 112 [2020-10-13 10:29:24,187 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2020-10-13 10:29:26,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:29:26,730 INFO L93 Difference]: Finished difference Result 297 states and 328 transitions. [2020-10-13 10:29:26,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:29:26,731 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-10-13 10:29:26,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:29:26,733 INFO L225 Difference]: With dead ends: 297 [2020-10-13 10:29:26,733 INFO L226 Difference]: Without dead ends: 294 [2020-10-13 10:29:26,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:29:26,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-13 10:29:26,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 240. [2020-10-13 10:29:26,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-13 10:29:26,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 261 transitions. [2020-10-13 10:29:26,755 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 261 transitions. Word has length 73 [2020-10-13 10:29:26,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:29:26,756 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 261 transitions. [2020-10-13 10:29:26,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:29:26,756 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 261 transitions. [2020-10-13 10:29:26,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 10:29:26,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:29:26,759 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 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, 1, 1] [2020-10-13 10:29:26,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 10:29:26,759 INFO L427 AbstractCegarLoop]: === Iteration 29 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:29:26,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:29:26,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1231806645, now seen corresponding path program 4 times [2020-10-13 10:29:26,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:29:26,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101535518] [2020-10-13 10:29:26,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:29:26,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:26,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:27,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:27,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:27,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 10:29:27,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:29:27,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 737 [2020-10-13 10:29:27,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:27,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:29:27,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 10:29:27,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 10:29:27,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:28,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:29:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:28,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:28,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:28,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:29:28,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:28,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:29:28,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:28,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:29:28,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:29:28,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:29:28,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:28,373 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:29:28,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101535518] [2020-10-13 10:29:28,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:29:28,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:29:28,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644947739] [2020-10-13 10:29:28,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:29:28,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:29:28,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:29:28,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:29:28,375 INFO L87 Difference]: Start difference. First operand 240 states and 261 transitions. Second operand 17 states. [2020-10-13 10:29:29,136 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 76 [2020-10-13 10:29:29,336 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 66 [2020-10-13 10:29:29,559 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 70 [2020-10-13 10:29:31,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:29:31,788 INFO L93 Difference]: Finished difference Result 296 states and 325 transitions. [2020-10-13 10:29:31,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:29:31,789 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-10-13 10:29:31,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:29:31,790 INFO L225 Difference]: With dead ends: 296 [2020-10-13 10:29:31,791 INFO L226 Difference]: Without dead ends: 293 [2020-10-13 10:29:31,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:29:31,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-10-13 10:29:31,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 247. [2020-10-13 10:29:31,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-13 10:29:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 268 transitions. [2020-10-13 10:29:31,816 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 268 transitions. Word has length 76 [2020-10-13 10:29:31,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:29:31,816 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 268 transitions. [2020-10-13 10:29:31,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:29:31,817 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 268 transitions. [2020-10-13 10:29:31,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 10:29:31,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:29:31,819 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:29:31,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 10:29:31,819 INFO L427 AbstractCegarLoop]: === Iteration 30 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:29:31,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:29:31,820 INFO L82 PathProgramCache]: Analyzing trace with hash 365285690, now seen corresponding path program 1 times [2020-10-13 10:29:31,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:29:31,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667889360] [2020-10-13 10:29:31,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:29:31,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:31,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:31,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:32,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:32,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:32,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:32,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:32,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:32,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:35,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:35,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:35,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:36,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:36,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:36,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 10:29:36,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 10:29:36,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 10:29:36,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:36,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:29:36,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-13 10:29:36,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 10:29:36,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:36,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:29:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:36,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:36,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:36,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:29:36,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:36,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:29:36,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:36,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:29:36,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:29:36,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:29:36,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:36,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 10:29:36,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:36,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:36,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:36,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 10:29:36,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:36,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:29:36,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:36,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:29:36,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:29:36,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:29:36,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:36,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-13 10:29:36,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:36,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:36,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:36,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:29:36,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:36,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-13 10:29:36,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:36,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:29:36,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:29:36,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 10:29:36,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:37,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-13 10:29:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:37,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:37,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:37,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 10:29:37,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:37,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 10:29:37,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:37,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:29:37,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:29:37,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:29:37,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:37,078 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 10:29:37,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667889360] [2020-10-13 10:29:37,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:29:37,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-13 10:29:37,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264459012] [2020-10-13 10:29:37,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:29:37,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:29:37,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:29:37,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:29:37,079 INFO L87 Difference]: Start difference. First operand 247 states and 268 transitions. Second operand 11 states. [2020-10-13 10:29:37,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:29:37,806 INFO L93 Difference]: Finished difference Result 259 states and 283 transitions. [2020-10-13 10:29:37,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:29:37,807 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 81 [2020-10-13 10:29:37,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:29:37,809 INFO L225 Difference]: With dead ends: 259 [2020-10-13 10:29:37,809 INFO L226 Difference]: Without dead ends: 256 [2020-10-13 10:29:37,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:29:37,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-13 10:29:37,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 246. [2020-10-13 10:29:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-13 10:29:37,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 266 transitions. [2020-10-13 10:29:37,828 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 266 transitions. Word has length 81 [2020-10-13 10:29:37,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:29:37,828 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 266 transitions. [2020-10-13 10:29:37,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:29:37,829 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 266 transitions. [2020-10-13 10:29:37,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 10:29:37,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:29:37,830 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:29:37,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 10:29:37,830 INFO L427 AbstractCegarLoop]: === Iteration 31 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:29:37,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:29:37,831 INFO L82 PathProgramCache]: Analyzing trace with hash -773363303, now seen corresponding path program 2 times [2020-10-13 10:29:37,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:29:37,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687966135] [2020-10-13 10:29:37,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:29:37,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:37,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:38,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:38,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 10:29:38,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:38,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 651 [2020-10-13 10:29:38,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:38,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:29:38,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 10:29:38,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 10:29:38,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:38,824 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-10-13 10:29:38,959 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-10-13 10:29:39,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:29:39,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:39,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:39,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:39,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:29:39,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:39,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:29:39,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:39,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:29:39,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:29:39,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:29:39,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:29:39,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687966135] [2020-10-13 10:29:39,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:29:39,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:29:39,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198402331] [2020-10-13 10:29:39,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:29:39,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:29:39,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:29:39,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:29:39,467 INFO L87 Difference]: Start difference. First operand 246 states and 266 transitions. Second operand 17 states. [2020-10-13 10:29:39,846 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-10-13 10:29:40,091 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-10-13 10:29:40,246 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-10-13 10:29:40,584 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 101 [2020-10-13 10:29:40,884 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2020-10-13 10:29:41,092 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2020-10-13 10:29:43,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:29:43,296 INFO L93 Difference]: Finished difference Result 294 states and 321 transitions. [2020-10-13 10:29:43,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:29:43,297 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-10-13 10:29:43,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:29:43,299 INFO L225 Difference]: With dead ends: 294 [2020-10-13 10:29:43,300 INFO L226 Difference]: Without dead ends: 291 [2020-10-13 10:29:43,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:29:43,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-13 10:29:43,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 249. [2020-10-13 10:29:43,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-13 10:29:43,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 269 transitions. [2020-10-13 10:29:43,322 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 269 transitions. Word has length 79 [2020-10-13 10:29:43,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:29:43,322 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 269 transitions. [2020-10-13 10:29:43,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:29:43,323 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 269 transitions. [2020-10-13 10:29:43,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 10:29:43,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:29:43,324 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:29:43,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 10:29:43,324 INFO L427 AbstractCegarLoop]: === Iteration 32 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:29:43,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:29:43,325 INFO L82 PathProgramCache]: Analyzing trace with hash 573043015, now seen corresponding path program 1 times [2020-10-13 10:29:43,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:29:43,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147102368] [2020-10-13 10:29:43,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:29:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:43,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:43,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:43,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:43,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:43,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:44,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:44,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:45,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:48,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:48,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 10:29:48,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 10:29:48,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 10:29:48,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:48,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:29:48,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 10:29:48,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 10:29:48,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:48,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:29:48,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:48,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:48,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:48,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:29:48,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:48,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:29:48,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:48,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:29:48,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:29:48,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:29:48,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:48,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 10:29:48,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:48,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:48,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:48,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 10:29:48,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:48,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-13 10:29:48,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:48,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:29:48,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:29:48,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 10:29:48,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:48,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-13 10:29:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:48,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:48,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:48,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:29:48,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:48,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-13 10:29:48,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:48,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:29:48,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:29:48,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:29:48,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:48,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-13 10:29:48,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:48,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:48,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:48,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 10:29:48,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:48,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-13 10:29:48,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:48,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:29:48,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:29:48,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:29:48,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 10:29:48,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147102368] [2020-10-13 10:29:48,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:29:48,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:29:48,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153365644] [2020-10-13 10:29:48,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:29:48,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:29:48,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:29:48,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:29:48,738 INFO L87 Difference]: Start difference. First operand 249 states and 269 transitions. Second operand 14 states. [2020-10-13 10:29:49,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:29:49,988 INFO L93 Difference]: Finished difference Result 342 states and 399 transitions. [2020-10-13 10:29:49,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:29:49,989 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 87 [2020-10-13 10:29:49,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:29:49,992 INFO L225 Difference]: With dead ends: 342 [2020-10-13 10:29:49,992 INFO L226 Difference]: Without dead ends: 293 [2020-10-13 10:29:49,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:29:49,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-10-13 10:29:50,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 275. [2020-10-13 10:29:50,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-13 10:29:50,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 311 transitions. [2020-10-13 10:29:50,018 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 311 transitions. Word has length 87 [2020-10-13 10:29:50,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:29:50,018 INFO L479 AbstractCegarLoop]: Abstraction has 275 states and 311 transitions. [2020-10-13 10:29:50,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:29:50,018 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 311 transitions. [2020-10-13 10:29:50,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 10:29:50,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:29:50,020 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:29:50,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 10:29:50,021 INFO L427 AbstractCegarLoop]: === Iteration 33 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:29:50,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:29:50,021 INFO L82 PathProgramCache]: Analyzing trace with hash -509280354, now seen corresponding path program 2 times [2020-10-13 10:29:50,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:29:50,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350234885] [2020-10-13 10:29:50,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:29:50,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:50,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:50,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:50,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:50,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:50,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:50,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:51,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:51,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:51,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:54,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:55,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:55,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:55,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 10:29:55,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 10:29:55,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-13 10:29:55,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:55,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:29:55,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-13 10:29:55,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:29:55,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:55,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:29:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:55,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:55,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:55,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:29:55,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:55,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:29:55,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:55,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:29:55,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:29:55,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:29:55,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:55,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 10:29:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:55,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:55,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:55,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 10:29:55,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:55,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:29:55,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:55,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:29:55,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:29:55,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:29:55,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:55,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-13 10:29:55,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:55,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:55,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:55,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:29:55,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:55,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:29:55,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:55,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:29:55,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:29:55,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:29:55,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:55,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-13 10:29:55,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:55,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:55,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:55,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:29:55,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:55,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-13 10:29:55,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:55,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:29:55,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:29:55,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:29:55,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:55,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-13 10:29:55,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:55,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:55,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:55,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 10:29:55,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:55,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 10:29:55,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:55,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:29:55,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:29:55,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:29:55,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:55,298 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-13 10:29:55,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350234885] [2020-10-13 10:29:55,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:29:55,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:29:55,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495999236] [2020-10-13 10:29:55,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:29:55,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:29:55,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:29:55,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:29:55,300 INFO L87 Difference]: Start difference. First operand 275 states and 311 transitions. Second operand 10 states. [2020-10-13 10:29:56,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:29:56,042 INFO L93 Difference]: Finished difference Result 351 states and 413 transitions. [2020-10-13 10:29:56,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:29:56,043 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 96 [2020-10-13 10:29:56,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:29:56,045 INFO L225 Difference]: With dead ends: 351 [2020-10-13 10:29:56,045 INFO L226 Difference]: Without dead ends: 271 [2020-10-13 10:29:56,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:29:56,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-13 10:29:56,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 269. [2020-10-13 10:29:56,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-13 10:29:56,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 303 transitions. [2020-10-13 10:29:56,064 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 303 transitions. Word has length 96 [2020-10-13 10:29:56,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:29:56,065 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 303 transitions. [2020-10-13 10:29:56,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:29:56,065 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 303 transitions. [2020-10-13 10:29:56,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 10:29:56,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:29:56,067 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:29:56,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 10:29:56,067 INFO L427 AbstractCegarLoop]: === Iteration 34 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:29:56,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:29:56,067 INFO L82 PathProgramCache]: Analyzing trace with hash -578861721, now seen corresponding path program 3 times [2020-10-13 10:29:56,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:29:56,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956193312] [2020-10-13 10:29:56,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:29:56,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:56,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:56,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:58,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:58,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 10:29:58,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:29:58,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2692 [2020-10-13 10:29:58,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:58,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:29:58,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:29:58,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-13 10:29:58,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:29:59,536 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-13 10:29:59,724 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-10-13 10:30:00,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:30:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:00,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:00,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:00,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:00,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:00,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:30:00,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:00,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:00,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:30:00,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:00,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:00,222 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 11 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:30:00,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956193312] [2020-10-13 10:30:00,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:30:00,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:30:00,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059633559] [2020-10-13 10:30:00,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:30:00,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:30:00,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:30:00,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:30:00,224 INFO L87 Difference]: Start difference. First operand 269 states and 303 transitions. Second operand 21 states. [2020-10-13 10:30:00,855 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2020-10-13 10:30:01,132 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 61 [2020-10-13 10:30:01,352 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 70 [2020-10-13 10:30:01,702 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 94 [2020-10-13 10:30:01,950 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 76 [2020-10-13 10:30:02,266 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 86 [2020-10-13 10:30:05,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:30:05,220 INFO L93 Difference]: Finished difference Result 328 states and 368 transitions. [2020-10-13 10:30:05,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:30:05,221 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 90 [2020-10-13 10:30:05,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:30:05,223 INFO L225 Difference]: With dead ends: 328 [2020-10-13 10:30:05,223 INFO L226 Difference]: Without dead ends: 325 [2020-10-13 10:30:05,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:30:05,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-13 10:30:05,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 280. [2020-10-13 10:30:05,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-13 10:30:05,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 315 transitions. [2020-10-13 10:30:05,249 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 315 transitions. Word has length 90 [2020-10-13 10:30:05,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:30:05,249 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 315 transitions. [2020-10-13 10:30:05,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:30:05,249 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 315 transitions. [2020-10-13 10:30:05,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 10:30:05,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:30:05,251 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 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, 1, 1] [2020-10-13 10:30:05,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 10:30:05,251 INFO L427 AbstractCegarLoop]: === Iteration 35 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:30:05,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:30:05,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1365798202, now seen corresponding path program 5 times [2020-10-13 10:30:05,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:30:05,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175431399] [2020-10-13 10:30:05,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:30:05,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:05,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:05,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:06,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:06,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:10,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:10,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 10:30:10,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:30:10,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4964 [2020-10-13 10:30:10,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:10,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:30:10,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:30:10,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 10:30:10,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:11,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:30:11,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:11,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:11,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:11,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:11,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:11,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:30:11,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:11,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:11,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:30:11,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:11,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:11,264 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 21 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:30:11,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175431399] [2020-10-13 10:30:11,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:30:11,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:30:11,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017230811] [2020-10-13 10:30:11,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:30:11,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:30:11,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:30:11,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:30:11,266 INFO L87 Difference]: Start difference. First operand 280 states and 315 transitions. Second operand 21 states. [2020-10-13 10:30:12,191 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-13 10:30:15,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:30:15,493 INFO L93 Difference]: Finished difference Result 486 states and 557 transitions. [2020-10-13 10:30:15,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:30:15,494 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 90 [2020-10-13 10:30:15,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:30:15,496 INFO L225 Difference]: With dead ends: 486 [2020-10-13 10:30:15,497 INFO L226 Difference]: Without dead ends: 386 [2020-10-13 10:30:15,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:30:15,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-10-13 10:30:15,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 358. [2020-10-13 10:30:15,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-10-13 10:30:15,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 397 transitions. [2020-10-13 10:30:15,527 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 397 transitions. Word has length 90 [2020-10-13 10:30:15,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:30:15,528 INFO L479 AbstractCegarLoop]: Abstraction has 358 states and 397 transitions. [2020-10-13 10:30:15,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:30:15,528 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 397 transitions. [2020-10-13 10:30:15,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 10:30:15,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:30:15,530 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:30:15,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 10:30:15,530 INFO L427 AbstractCegarLoop]: === Iteration 36 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:30:15,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:30:15,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1713268359, now seen corresponding path program 1 times [2020-10-13 10:30:15,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:30:15,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599073856] [2020-10-13 10:30:15,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:30:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:15,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:16,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:16,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:16,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:16,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:16,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:17,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:17,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:18,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:18,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:20,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:20,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 10:30:20,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 10:30:20,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 10:30:20,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:20,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:30:20,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 10:30:20,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 10:30:20,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:20,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:30:20,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:20,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:20,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:20,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:20,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:20,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:30:20,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:20,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:20,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:30:20,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:20,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:20,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 10:30:20,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:20,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:20,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:20,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 10:30:20,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:20,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-13 10:30:20,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:20,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:30:20,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:30:20,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 10:30:20,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:20,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-13 10:30:20,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:20,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:20,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:20,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:21,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:22,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:22,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 10:30:22,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:30:22,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2089 [2020-10-13 10:30:22,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:22,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:30:22,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:30:22,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 10:30:22,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:22,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-13 10:30:22,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:22,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:23,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:23,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:23,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:23,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:23,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:30:23,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:30:23,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 904 [2020-10-13 10:30:23,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:23,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:30:23,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:30:23,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:30:23,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:23,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:30:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:23,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:23,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:23,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:23,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:23,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:30:23,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:23,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:30:23,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:30:23,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:30:23,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:24,027 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 10:30:24,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599073856] [2020-10-13 10:30:24,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:30:24,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:30:24,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8084200] [2020-10-13 10:30:24,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:30:24,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:30:24,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:30:24,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:30:24,029 INFO L87 Difference]: Start difference. First operand 358 states and 397 transitions. Second operand 17 states. [2020-10-13 10:30:25,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:30:25,790 INFO L93 Difference]: Finished difference Result 531 states and 642 transitions. [2020-10-13 10:30:25,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:30:25,791 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 96 [2020-10-13 10:30:25,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:30:25,793 INFO L225 Difference]: With dead ends: 531 [2020-10-13 10:30:25,793 INFO L226 Difference]: Without dead ends: 465 [2020-10-13 10:30:25,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:30:25,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-10-13 10:30:25,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 422. [2020-10-13 10:30:25,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2020-10-13 10:30:25,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 478 transitions. [2020-10-13 10:30:25,832 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 478 transitions. Word has length 96 [2020-10-13 10:30:25,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:30:25,832 INFO L479 AbstractCegarLoop]: Abstraction has 422 states and 478 transitions. [2020-10-13 10:30:25,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:30:25,833 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 478 transitions. [2020-10-13 10:30:25,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-13 10:30:25,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:30:25,835 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:30:25,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 10:30:25,835 INFO L427 AbstractCegarLoop]: === Iteration 37 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:30:25,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:30:25,836 INFO L82 PathProgramCache]: Analyzing trace with hash -737650540, now seen corresponding path program 3 times [2020-10-13 10:30:25,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:30:25,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945079298] [2020-10-13 10:30:25,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:30:25,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:25,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:26,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:26,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 10:30:26,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:26,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 921 [2020-10-13 10:30:26,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:26,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:30:26,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:30:26,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-13 10:30:26,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:27,509 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-13 10:30:27,818 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-10-13 10:30:27,983 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2020-10-13 10:30:28,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:30:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:28,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:28,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:28,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:28,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:28,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:30:28,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:28,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:28,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:30:28,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:28,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:28,616 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:30:28,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945079298] [2020-10-13 10:30:28,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:30:28,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:30:28,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813611009] [2020-10-13 10:30:28,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:30:28,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:30:28,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:30:28,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=378, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:30:28,618 INFO L87 Difference]: Start difference. First operand 422 states and 478 transitions. Second operand 21 states. [2020-10-13 10:30:29,101 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-10-13 10:30:29,458 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 100 [2020-10-13 10:30:30,013 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 101 [2020-10-13 10:30:30,636 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 138 [2020-10-13 10:30:30,993 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 99 [2020-10-13 10:30:32,046 WARN L193 SmtUtils]: Spent 855.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 146 [2020-10-13 10:30:32,742 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 151 [2020-10-13 10:30:33,143 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 112 [2020-10-13 10:30:36,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:30:36,777 INFO L93 Difference]: Finished difference Result 460 states and 522 transitions. [2020-10-13 10:30:36,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:30:36,778 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2020-10-13 10:30:36,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:30:36,781 INFO L225 Difference]: With dead ends: 460 [2020-10-13 10:30:36,781 INFO L226 Difference]: Without dead ends: 457 [2020-10-13 10:30:36,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:30:36,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2020-10-13 10:30:36,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 405. [2020-10-13 10:30:36,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 405 states. [2020-10-13 10:30:36,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 460 transitions. [2020-10-13 10:30:36,818 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 460 transitions. Word has length 93 [2020-10-13 10:30:36,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:30:36,819 INFO L479 AbstractCegarLoop]: Abstraction has 405 states and 460 transitions. [2020-10-13 10:30:36,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:30:36,819 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 460 transitions. [2020-10-13 10:30:36,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 10:30:36,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:30:36,821 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:30:36,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 10:30:36,822 INFO L427 AbstractCegarLoop]: === Iteration 38 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:30:36,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:30:36,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1371561523, now seen corresponding path program 1 times [2020-10-13 10:30:36,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:30:36,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043541947] [2020-10-13 10:30:36,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:30:36,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:36,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:37,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:37,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:39,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:40,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:41,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:41,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:41,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:41,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 10:30:41,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 10:30:41,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5128 [2020-10-13 10:30:41,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:41,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:30:41,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-10-13 10:30:41,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:30:41,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:42,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:30:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:42,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:42,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:42,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:42,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:42,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:30:42,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:42,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:42,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:30:42,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:42,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:42,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 10:30:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:42,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:42,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:42,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 10:30:42,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:42,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:30:42,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:42,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:42,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:30:42,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:42,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:42,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-13 10:30:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:42,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:42,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:42,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:43,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:43,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:30:43,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:30:43,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1660 [2020-10-13 10:30:43,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:43,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:30:43,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:30:43,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:30:43,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:43,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-13 10:30:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:43,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:44,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:44,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:44,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:44,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:30:44,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:30:44,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1104 [2020-10-13 10:30:44,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:44,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:30:44,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:30:44,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:30:44,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:45,273 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 29 [2020-10-13 10:30:45,540 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 37 [2020-10-13 10:30:45,798 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 37 [2020-10-13 10:30:46,049 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 34 [2020-10-13 10:30:46,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:30:46,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:46,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:46,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:46,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:46,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:46,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-13 10:30:46,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:46,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:30:46,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:30:46,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:30:46,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0