/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=DEEPEST --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 language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:38:23,705 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:38:23,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:38:23,751 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:38:23,751 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:38:23,753 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:38:23,755 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:38:23,757 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:38:23,760 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:38:23,761 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:38:23,762 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:38:23,764 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:38:23,765 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:38:23,766 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:38:23,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:38:23,769 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:38:23,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:38:23,771 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:38:23,785 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:38:23,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:38:23,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:38:23,791 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:38:23,793 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:38:23,794 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:38:23,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:38:23,798 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:38:23,798 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:38:23,799 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:38:23,800 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:38:23,801 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:38:23,801 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:38:23,803 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:38:23,803 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:38:23,804 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:38:23,806 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:38:23,806 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:38:23,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:38:23,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:38:23,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:38:23,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:38:23,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:38:23,812 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 [2020-10-27 23:38:23,843 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:38:23,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:38:23,846 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:38:23,847 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:38:23,849 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:38:23,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:38:23,849 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:38:23,850 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:38:23,850 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:38:23,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:38:23,851 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:38:23,852 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:38:23,852 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:38:23,852 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:38:23,853 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:38:23,853 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:38:23,853 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:38:23,853 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:38:23,854 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:38:23,854 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:38:23,854 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:38:23,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:38:23,855 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:38:23,855 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:38:23,856 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:38:23,856 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:38:23,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:38:23,856 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:38:23,857 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:38:23,857 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:38:24,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:38:24,409 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:38:24,414 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:38:24,415 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:38:24,416 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:38:24,417 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-27 23:38:24,507 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7245737a5/5a53272d90614986ac31e630bd2f602b/FLAGf154d4d6c [2020-10-27 23:38:25,216 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:38:25,217 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-27 23:38:25,233 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7245737a5/5a53272d90614986ac31e630bd2f602b/FLAGf154d4d6c [2020-10-27 23:38:25,501 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7245737a5/5a53272d90614986ac31e630bd2f602b [2020-10-27 23:38:25,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:38:25,514 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:38:25,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:38:25,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:38:25,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:38:25,524 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:38:25" (1/1) ... [2020-10-27 23:38:25,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56eb8d31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:38:25, skipping insertion in model container [2020-10-27 23:38:25,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:38:25" (1/1) ... [2020-10-27 23:38:25,538 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:38:25,594 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:38:25,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:38:25,860 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:38:25,908 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:38:25,941 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:38:25,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:38:25 WrapperNode [2020-10-27 23:38:25,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:38:25,943 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:38:25,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:38:25,944 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:38:25,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:38:25" (1/1) ... [2020-10-27 23:38:25,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:38:25" (1/1) ... [2020-10-27 23:38:25,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:38:25" (1/1) ... [2020-10-27 23:38:25,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:38:25" (1/1) ... [2020-10-27 23:38:25,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:38:25" (1/1) ... [2020-10-27 23:38:25,995 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:38:25" (1/1) ... [2020-10-27 23:38:25,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:38:25" (1/1) ... [2020-10-27 23:38:26,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:38:26,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:38:26,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:38:26,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:38:26,006 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:38:25" (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 [2020-10-27 23:38:26,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:38:26,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:38:26,096 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:38:26,096 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:38:26,096 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:38:26,096 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:38:26,097 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:38:26,097 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:38:26,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:38:26,097 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:38:26,097 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:38:26,098 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:38:26,098 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:38:26,098 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:38:26,098 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:38:26,098 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:38:26,099 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:38:26,099 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:38:26,099 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:38:26,099 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:38:26,099 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:38:26,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:38:26,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:38:26,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:38:26,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:38:26,101 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:38:26,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:38:26,977 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:38:26,977 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:38:26,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:38:26 BoogieIcfgContainer [2020-10-27 23:38:26,979 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:38:26,981 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:38:26,981 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:38:26,985 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:38:26,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:38:25" (1/3) ... [2020-10-27 23:38:26,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dda6c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:38:26, skipping insertion in model container [2020-10-27 23:38:26,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:38:25" (2/3) ... [2020-10-27 23:38:26,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dda6c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:38:26, skipping insertion in model container [2020-10-27 23:38:26,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:38:26" (3/3) ... [2020-10-27 23:38:26,989 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-27 23:38:27,002 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:38:27,007 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:38:27,021 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:38:27,050 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:38:27,051 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:38:27,051 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:38:27,051 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:38:27,051 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:38:27,051 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:38:27,051 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:38:27,052 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:38:27,071 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states. [2020-10-27 23:38:27,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 23:38:27,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:38:27,080 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:38:27,081 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:38:27,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:38:27,088 INFO L82 PathProgramCache]: Analyzing trace with hash -423992621, now seen corresponding path program 1 times [2020-10-27 23:38:27,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:38:27,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239212650] [2020-10-27 23:38:27,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:38:27,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:27,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:27,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:27,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:27,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:29,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:29,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 23:38:29,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:38:29,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2464 [2020-10-27 23:38:29,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:29,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:38:29,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 23:38:29,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 23:38:29,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 23:38:30,113 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:38:30,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:38:30,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:30,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:30,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:30,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:38:30,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:38:30,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 23:38:30,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:30,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:38:30,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:38:30,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:38:30,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:38:30,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:38:30,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239212650] [2020-10-27 23:38:30,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:38:30,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:38:30,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949430064] [2020-10-27 23:38:30,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:38:30,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:38:30,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:38:30,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:38:30,200 INFO L87 Difference]: Start difference. First operand 71 states. Second operand 4 states. [2020-10-27 23:38:30,422 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:38:30,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:38:30,811 INFO L93 Difference]: Finished difference Result 153 states and 239 transitions. [2020-10-27 23:38:30,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:38:30,813 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-27 23:38:30,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:38:30,825 INFO L225 Difference]: With dead ends: 153 [2020-10-27 23:38:30,825 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 23:38:30,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:38:30,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 23:38:30,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2020-10-27 23:38:30,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 23:38:30,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 135 transitions. [2020-10-27 23:38:30,920 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 135 transitions. Word has length 41 [2020-10-27 23:38:30,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:38:30,920 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 135 transitions. [2020-10-27 23:38:30,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:38:30,921 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 135 transitions. [2020-10-27 23:38:30,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 23:38:30,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:38:30,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:38:30,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:38:30,923 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:38:30,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:38:30,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1549667987, now seen corresponding path program 1 times [2020-10-27 23:38:30,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:38:30,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716014175] [2020-10-27 23:38:30,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:38:30,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:30,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:31,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:31,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:31,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:33,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:33,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 23:38:33,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:38:33,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2627 [2020-10-27 23:38:33,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:33,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:38:33,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 23:38:33,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 23:38:33,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:38:33,767 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:38:33,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:38:33,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:33,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:33,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:33,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:38:33,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:38:33,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:38:33,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:33,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:38:33,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:38:33,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:38:33,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:38:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:38:33,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716014175] [2020-10-27 23:38:33,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:38:33,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:38:33,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967231078] [2020-10-27 23:38:33,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:38:33,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:38:33,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:38:33,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:38:33,804 INFO L87 Difference]: Start difference. First operand 94 states and 135 transitions. Second operand 4 states. [2020-10-27 23:38:33,988 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:38:34,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:38:34,277 INFO L93 Difference]: Finished difference Result 220 states and 333 transitions. [2020-10-27 23:38:34,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:38:34,278 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-27 23:38:34,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:38:34,281 INFO L225 Difference]: With dead ends: 220 [2020-10-27 23:38:34,281 INFO L226 Difference]: Without dead ends: 149 [2020-10-27 23:38:34,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:38:34,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-27 23:38:34,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 146. [2020-10-27 23:38:34,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-27 23:38:34,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 217 transitions. [2020-10-27 23:38:34,305 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 217 transitions. Word has length 42 [2020-10-27 23:38:34,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:38:34,305 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 217 transitions. [2020-10-27 23:38:34,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:38:34,306 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 217 transitions. [2020-10-27 23:38:34,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 23:38:34,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:38:34,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:38:34,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:38:34,308 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:38:34,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:38:34,309 INFO L82 PathProgramCache]: Analyzing trace with hash 758696479, now seen corresponding path program 1 times [2020-10-27 23:38:34,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:38:34,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171731917] [2020-10-27 23:38:34,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:38:34,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:34,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:34,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:34,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:35,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:35,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 23:38:35,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 23:38:35,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1308 [2020-10-27 23:38:35,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:35,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:38:35,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 23:38:35,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 23:38:35,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:38:35,818 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:38:35,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:38:35,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:35,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:35,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:35,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:38:35,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:38:35,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:38:35,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:35,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:38:35,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:38:35,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:38:35,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:38:35,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:38:35,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171731917] [2020-10-27 23:38:35,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:38:35,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:38:35,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513453119] [2020-10-27 23:38:35,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:38:35,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:38:35,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:38:35,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:38:35,858 INFO L87 Difference]: Start difference. First operand 146 states and 217 transitions. Second operand 4 states. [2020-10-27 23:38:36,009 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:38:36,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:38:36,313 INFO L93 Difference]: Finished difference Result 360 states and 553 transitions. [2020-10-27 23:38:36,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:38:36,314 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-27 23:38:36,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:38:36,317 INFO L225 Difference]: With dead ends: 360 [2020-10-27 23:38:36,317 INFO L226 Difference]: Without dead ends: 237 [2020-10-27 23:38:36,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:38:36,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-27 23:38:36,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 234. [2020-10-27 23:38:36,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-27 23:38:36,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 353 transitions. [2020-10-27 23:38:36,353 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 353 transitions. Word has length 43 [2020-10-27 23:38:36,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:38:36,354 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 353 transitions. [2020-10-27 23:38:36,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:38:36,354 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 353 transitions. [2020-10-27 23:38:36,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 23:38:36,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:38:36,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:38:36,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:38:36,359 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:38:36,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:38:36,359 INFO L82 PathProgramCache]: Analyzing trace with hash 724612549, now seen corresponding path program 1 times [2020-10-27 23:38:36,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:38:36,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922134612] [2020-10-27 23:38:36,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:38:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:36,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:36,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:36,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:36,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:39,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:39,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 23:38:39,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:38:39,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3289 [2020-10-27 23:38:39,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:39,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:38:39,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:38:39,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 23:38:39,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:38:39,886 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:38:39,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:38:39,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:39,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:39,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:39,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:38:39,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:38:39,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:38:39,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:39,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:38:39,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:38:39,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:38:39,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:38:39,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:38:39,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922134612] [2020-10-27 23:38:39,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:38:39,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:38:39,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606473201] [2020-10-27 23:38:39,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:38:39,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:38:39,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:38:39,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:38:39,928 INFO L87 Difference]: Start difference. First operand 234 states and 353 transitions. Second operand 7 states. [2020-10-27 23:38:40,089 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:38:40,447 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 23:38:40,651 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:38:40,953 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 23:38:41,079 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 23:38:41,309 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 23:38:41,438 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:38:41,742 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 23:38:41,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:38:41,834 INFO L93 Difference]: Finished difference Result 1910 states and 2969 transitions. [2020-10-27 23:38:41,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:38:41,835 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-10-27 23:38:41,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:38:41,849 INFO L225 Difference]: With dead ends: 1910 [2020-10-27 23:38:41,849 INFO L226 Difference]: Without dead ends: 1699 [2020-10-27 23:38:41,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:38:41,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2020-10-27 23:38:41,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 642. [2020-10-27 23:38:41,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2020-10-27 23:38:41,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 989 transitions. [2020-10-27 23:38:41,953 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 989 transitions. Word has length 44 [2020-10-27 23:38:41,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:38:41,953 INFO L481 AbstractCegarLoop]: Abstraction has 642 states and 989 transitions. [2020-10-27 23:38:41,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:38:41,953 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 989 transitions. [2020-10-27 23:38:41,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 23:38:41,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:38:41,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:38:41,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:38:41,955 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:38:41,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:38:41,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1559815040, now seen corresponding path program 1 times [2020-10-27 23:38:41,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:38:41,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462268664] [2020-10-27 23:38:41,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:38:41,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:42,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:42,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:42,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:42,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 23:38:42,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:38:42,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 740 [2020-10-27 23:38:42,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:42,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:38:42,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 23:38:42,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 23:38:42,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:38:42,936 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:38:42,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:38:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:42,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:42,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:42,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:38:42,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:38:42,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:38:42,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:42,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:38:42,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:38:42,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:38:42,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:38:42,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:38:42,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462268664] [2020-10-27 23:38:42,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:38:42,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:38:42,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751756520] [2020-10-27 23:38:42,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:38:42,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:38:42,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:38:42,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:38:42,971 INFO L87 Difference]: Start difference. First operand 642 states and 989 transitions. Second operand 6 states. [2020-10-27 23:38:43,169 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 23:38:43,655 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 23:38:43,855 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:38:44,100 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:38:44,263 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 23:38:44,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:38:44,466 INFO L93 Difference]: Finished difference Result 4356 states and 6785 transitions. [2020-10-27 23:38:44,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:38:44,467 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-10-27 23:38:44,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:38:44,489 INFO L225 Difference]: With dead ends: 4356 [2020-10-27 23:38:44,489 INFO L226 Difference]: Without dead ends: 3737 [2020-10-27 23:38:44,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 23:38:44,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3737 states. [2020-10-27 23:38:44,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3737 to 1258. [2020-10-27 23:38:44,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1258 states. [2020-10-27 23:38:44,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1905 transitions. [2020-10-27 23:38:44,670 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1905 transitions. Word has length 44 [2020-10-27 23:38:44,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:38:44,671 INFO L481 AbstractCegarLoop]: Abstraction has 1258 states and 1905 transitions. [2020-10-27 23:38:44,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:38:44,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1905 transitions. [2020-10-27 23:38:44,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 23:38:44,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:38:44,673 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:38:44,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:38:44,674 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:38:44,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:38:44,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1262547610, now seen corresponding path program 1 times [2020-10-27 23:38:44,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:38:44,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61931574] [2020-10-27 23:38:44,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:38:44,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:44,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:44,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:45,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:45,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 23:38:45,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:38:45,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 648 [2020-10-27 23:38:45,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:45,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:38:45,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 23:38:45,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 23:38:45,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:38:45,594 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:38:45,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:38:45,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:45,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:45,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:45,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:38:45,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:38:45,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:38:45,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:45,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:38:45,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:38:45,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:38:45,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:38:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:38:45,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61931574] [2020-10-27 23:38:45,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:38:45,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:38:45,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481665226] [2020-10-27 23:38:45,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:38:45,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:38:45,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:38:45,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:38:45,635 INFO L87 Difference]: Start difference. First operand 1258 states and 1905 transitions. Second operand 6 states. [2020-10-27 23:38:45,874 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 23:38:46,464 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 23:38:46,661 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 23:38:46,898 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 23:38:47,066 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 23:38:47,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:38:47,303 INFO L93 Difference]: Finished difference Result 4972 states and 7557 transitions. [2020-10-27 23:38:47,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:38:47,304 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-27 23:38:47,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:38:47,326 INFO L225 Difference]: With dead ends: 4972 [2020-10-27 23:38:47,326 INFO L226 Difference]: Without dead ends: 3737 [2020-10-27 23:38:47,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 23:38:47,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3737 states. [2020-10-27 23:38:47,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3737 to 1258. [2020-10-27 23:38:47,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1258 states. [2020-10-27 23:38:47,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1881 transitions. [2020-10-27 23:38:47,527 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1881 transitions. Word has length 46 [2020-10-27 23:38:47,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:38:47,529 INFO L481 AbstractCegarLoop]: Abstraction has 1258 states and 1881 transitions. [2020-10-27 23:38:47,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:38:47,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1881 transitions. [2020-10-27 23:38:47,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 23:38:47,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:38:47,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:38:47,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:38:47,535 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:38:47,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:38:47,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1884077243, now seen corresponding path program 1 times [2020-10-27 23:38:47,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:38:47,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489001681] [2020-10-27 23:38:47,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:38:47,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:47,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:47,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:47,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:47,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:48,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:48,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 23:38:48,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:38:48,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 695 [2020-10-27 23:38:48,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:48,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:38:48,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-27 23:38:48,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 23:38:48,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:38:48,469 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:38:48,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:38:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:48,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:48,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:48,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:38:48,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:38:48,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:38:48,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:48,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:38:48,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:38:48,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:38:48,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:38:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:38:48,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489001681] [2020-10-27 23:38:48,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:38:48,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:38:48,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989315111] [2020-10-27 23:38:48,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:38:48,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:38:48,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:38:48,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:38:48,503 INFO L87 Difference]: Start difference. First operand 1258 states and 1881 transitions. Second operand 5 states. [2020-10-27 23:38:49,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:38:49,112 INFO L93 Difference]: Finished difference Result 2589 states and 3835 transitions. [2020-10-27 23:38:49,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:38:49,113 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-10-27 23:38:49,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:38:49,127 INFO L225 Difference]: With dead ends: 2589 [2020-10-27 23:38:49,127 INFO L226 Difference]: Without dead ends: 2586 [2020-10-27 23:38:49,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:38:49,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2586 states. [2020-10-27 23:38:49,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2586 to 1354. [2020-10-27 23:38:49,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1354 states. [2020-10-27 23:38:49,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 1977 transitions. [2020-10-27 23:38:49,291 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 1977 transitions. Word has length 46 [2020-10-27 23:38:49,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:38:49,293 INFO L481 AbstractCegarLoop]: Abstraction has 1354 states and 1977 transitions. [2020-10-27 23:38:49,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:38:49,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 1977 transitions. [2020-10-27 23:38:49,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 23:38:49,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:38:49,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:38:49,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:38:49,296 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:38:49,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:38:49,297 INFO L82 PathProgramCache]: Analyzing trace with hash 2021247641, now seen corresponding path program 1 times [2020-10-27 23:38:49,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:38:49,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124103507] [2020-10-27 23:38:49,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:38:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:49,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:49,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:49,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:49,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:49,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 23:38:49,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 23:38:49,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 386 [2020-10-27 23:38:49,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:49,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:38:49,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 23:38:49,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 23:38:49,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:38:49,897 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:38:49,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:38:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:49,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:49,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:49,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:38:49,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:38:49,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:38:49,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:49,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:38:49,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:38:49,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:38:49,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:38:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:38:49,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124103507] [2020-10-27 23:38:49,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:38:49,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:38:49,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871022083] [2020-10-27 23:38:49,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:38:49,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:38:49,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:38:49,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:38:49,953 INFO L87 Difference]: Start difference. First operand 1354 states and 1977 transitions. Second operand 4 states. [2020-10-27 23:38:50,119 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 23:38:50,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:38:50,567 INFO L93 Difference]: Finished difference Result 3270 states and 4791 transitions. [2020-10-27 23:38:50,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:38:50,568 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-10-27 23:38:50,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:38:50,578 INFO L225 Difference]: With dead ends: 3270 [2020-10-27 23:38:50,579 INFO L226 Difference]: Without dead ends: 1939 [2020-10-27 23:38:50,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:38:50,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2020-10-27 23:38:50,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 1936. [2020-10-27 23:38:50,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1936 states. [2020-10-27 23:38:50,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 2799 transitions. [2020-10-27 23:38:50,783 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 2799 transitions. Word has length 47 [2020-10-27 23:38:50,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:38:50,785 INFO L481 AbstractCegarLoop]: Abstraction has 1936 states and 2799 transitions. [2020-10-27 23:38:50,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:38:50,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 2799 transitions. [2020-10-27 23:38:50,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:38:50,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:38:50,790 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:38:50,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:38:50,790 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:38:50,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:38:50,791 INFO L82 PathProgramCache]: Analyzing trace with hash 707316226, now seen corresponding path program 1 times [2020-10-27 23:38:50,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:38:50,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690542075] [2020-10-27 23:38:50,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:38:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:50,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:50,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:50,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:51,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:51,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:51,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:51,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:52,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:52,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:52,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:52,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:53,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:53,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:54,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:55,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:55,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:55,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:38:55,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:38:55,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-27 23:38:55,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:55,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:38:55,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:38:55,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 23:38:55,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:38:56,268 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:38:56,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:38:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:56,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:56,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:56,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:38:56,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:38:56,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:38:56,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:56,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:38:56,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:38:56,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:38:56,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:38:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:38:56,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690542075] [2020-10-27 23:38:56,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:38:56,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 23:38:56,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399509] [2020-10-27 23:38:56,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:38:56,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:38:56,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:38:56,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:38:56,321 INFO L87 Difference]: Start difference. First operand 1936 states and 2799 transitions. Second operand 11 states. [2020-10-27 23:38:56,547 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 23:38:58,070 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 23:38:58,300 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 23:38:58,527 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 23:38:59,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:38:59,206 INFO L93 Difference]: Finished difference Result 7689 states and 10927 transitions. [2020-10-27 23:38:59,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 23:38:59,206 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2020-10-27 23:38:59,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:38:59,240 INFO L225 Difference]: With dead ends: 7689 [2020-10-27 23:38:59,241 INFO L226 Difference]: Without dead ends: 5778 [2020-10-27 23:38:59,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=446, Invalid=1716, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 23:38:59,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5778 states. [2020-10-27 23:38:59,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5778 to 2346. [2020-10-27 23:38:59,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2346 states. [2020-10-27 23:38:59,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 3297 transitions. [2020-10-27 23:38:59,568 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 3297 transitions. Word has length 65 [2020-10-27 23:38:59,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:38:59,568 INFO L481 AbstractCegarLoop]: Abstraction has 2346 states and 3297 transitions. [2020-10-27 23:38:59,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:38:59,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 3297 transitions. [2020-10-27 23:38:59,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:38:59,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:38:59,571 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:38:59,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:38:59,571 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:38:59,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:38:59,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1443418108, now seen corresponding path program 1 times [2020-10-27 23:38:59,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:38:59,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859107342] [2020-10-27 23:38:59,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:38:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:59,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:59,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:59,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:59,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:00,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:01,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:01,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:01,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:02,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:02,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:03,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:03,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:04,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:04,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:39:04,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:39:04,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:39:04,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 23:39:04,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:39:04,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 23:39:04,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:39:04,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 23:39:04,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:39:04,864 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 22 [2020-10-27 23:39:05,093 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:39:05,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:39:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:39:05,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:05,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:39:05,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:39:05,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:39:05,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:39:05,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:39:05,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:39:05,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:39:05,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:39:05,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:39:05,127 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:39:05,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859107342] [2020-10-27 23:39:05,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:39:05,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 23:39:05,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031023539] [2020-10-27 23:39:05,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 23:39:05,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:39:05,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 23:39:05,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:39:05,130 INFO L87 Difference]: Start difference. First operand 2346 states and 3297 transitions. Second operand 12 states. [2020-10-27 23:39:05,365 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 23:39:08,313 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:39:08,518 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 23:39:08,705 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 23:39:08,942 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:39:10,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:39:10,475 INFO L93 Difference]: Finished difference Result 9471 states and 13163 transitions. [2020-10-27 23:39:10,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-10-27 23:39:10,478 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2020-10-27 23:39:10,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:39:10,524 INFO L225 Difference]: With dead ends: 9471 [2020-10-27 23:39:10,524 INFO L226 Difference]: Without dead ends: 8322 [2020-10-27 23:39:10,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3168 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1125, Invalid=6885, Unknown=0, NotChecked=0, Total=8010 [2020-10-27 23:39:10,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8322 states. [2020-10-27 23:39:11,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8322 to 3905. [2020-10-27 23:39:11,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3905 states. [2020-10-27 23:39:11,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3905 states to 3905 states and 5497 transitions. [2020-10-27 23:39:11,236 INFO L78 Accepts]: Start accepts. Automaton has 3905 states and 5497 transitions. Word has length 65 [2020-10-27 23:39:11,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:39:11,237 INFO L481 AbstractCegarLoop]: Abstraction has 3905 states and 5497 transitions. [2020-10-27 23:39:11,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 23:39:11,237 INFO L276 IsEmpty]: Start isEmpty. Operand 3905 states and 5497 transitions. [2020-10-27 23:39:11,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:39:11,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:39:11,239 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:39:11,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:39:11,240 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:39:11,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:39:11,240 INFO L82 PathProgramCache]: Analyzing trace with hash 2043915400, now seen corresponding path program 1 times [2020-10-27 23:39:11,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:39:11,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289019299] [2020-10-27 23:39:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:39:11,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:39:11,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:11,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:11,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:11,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:11,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:11,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:12,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:13,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:13,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:13,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:13,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:14,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:16,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:39:16,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:39:16,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:39:16,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 23:39:16,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:39:16,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:39:16,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 23:39:16,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 23:39:16,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:39:16,497 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:39:16,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:39:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:39:16,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:16,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:39:16,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:39:16,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:39:16,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:39:16,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:39:16,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:39:16,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:39:16,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:39:16,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:39:16,540 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 23:39:16,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289019299] [2020-10-27 23:39:16,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:39:16,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 23:39:16,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143772404] [2020-10-27 23:39:16,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:39:16,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:39:16,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:39:16,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:39:16,547 INFO L87 Difference]: Start difference. First operand 3905 states and 5497 transitions. Second operand 6 states. [2020-10-27 23:39:16,792 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-27 23:39:17,389 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 23:39:17,600 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 23:39:17,776 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 23:39:19,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:39:19,028 INFO L93 Difference]: Finished difference Result 18313 states and 25859 transitions. [2020-10-27 23:39:19,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 23:39:19,029 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-27 23:39:19,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:39:19,068 INFO L225 Difference]: With dead ends: 18313 [2020-10-27 23:39:19,068 INFO L226 Difference]: Without dead ends: 14433 [2020-10-27 23:39:19,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:39:19,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14433 states. [2020-10-27 23:39:20,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14433 to 8891. [2020-10-27 23:39:20,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8891 states. [2020-10-27 23:39:20,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8891 states to 8891 states and 12443 transitions. [2020-10-27 23:39:20,390 INFO L78 Accepts]: Start accepts. Automaton has 8891 states and 12443 transitions. Word has length 65 [2020-10-27 23:39:20,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:39:20,390 INFO L481 AbstractCegarLoop]: Abstraction has 8891 states and 12443 transitions. [2020-10-27 23:39:20,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:39:20,390 INFO L276 IsEmpty]: Start isEmpty. Operand 8891 states and 12443 transitions. [2020-10-27 23:39:20,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:39:20,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:39:20,393 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:39:20,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:39:20,393 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:39:20,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:39:20,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1255907390, now seen corresponding path program 1 times [2020-10-27 23:39:20,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:39:20,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496406563] [2020-10-27 23:39:20,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:39:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:39:20,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:20,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:20,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:20,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:20,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:21,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:21,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:21,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:22,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:22,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:22,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:22,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:23,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:23,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:24,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:25,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:25,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:39:25,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:39:25,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:39:25,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-27 23:39:25,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:39:25,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 23:39:25,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:39:25,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 23:39:25,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:39:25,696 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 29 [2020-10-27 23:39:25,938 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:39:25,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:39:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:39:25,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:25,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:39:25,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:39:25,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:39:25,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:39:25,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:39:25,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:39:25,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:39:25,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:39:25,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:39:25,971 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:39:25,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496406563] [2020-10-27 23:39:25,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:39:25,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 23:39:25,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755243398] [2020-10-27 23:39:25,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 23:39:25,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:39:25,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 23:39:25,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:39:25,975 INFO L87 Difference]: Start difference. First operand 8891 states and 12443 transitions. Second operand 12 states. [2020-10-27 23:39:26,288 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-27 23:39:26,618 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-10-27 23:39:26,761 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-10-27 23:39:27,692 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-10-27 23:39:28,142 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-10-27 23:39:28,836 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:39:29,054 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 23:39:29,247 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 23:39:29,453 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:39:30,433 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-10-27 23:39:30,716 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-10-27 23:39:34,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:39:34,910 INFO L93 Difference]: Finished difference Result 43207 states and 59172 transitions. [2020-10-27 23:39:34,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-27 23:39:34,910 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2020-10-27 23:39:34,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:39:35,003 INFO L225 Difference]: With dead ends: 43207 [2020-10-27 23:39:35,004 INFO L226 Difference]: Without dead ends: 37717 [2020-10-27 23:39:35,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=493, Invalid=2699, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 23:39:35,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37717 states. [2020-10-27 23:39:37,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37717 to 20148. [2020-10-27 23:39:37,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20148 states. [2020-10-27 23:39:37,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20148 states to 20148 states and 28201 transitions. [2020-10-27 23:39:37,995 INFO L78 Accepts]: Start accepts. Automaton has 20148 states and 28201 transitions. Word has length 65 [2020-10-27 23:39:37,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:39:37,996 INFO L481 AbstractCegarLoop]: Abstraction has 20148 states and 28201 transitions. [2020-10-27 23:39:37,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 23:39:37,996 INFO L276 IsEmpty]: Start isEmpty. Operand 20148 states and 28201 transitions. [2020-10-27 23:39:37,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:39:37,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:39:38,000 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:39:38,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:39:38,000 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:39:38,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:39:38,001 INFO L82 PathProgramCache]: Analyzing trace with hash -519805508, now seen corresponding path program 1 times [2020-10-27 23:39:38,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:39:38,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715689855] [2020-10-27 23:39:38,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:39:38,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:39:38,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:38,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:38,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:38,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:38,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:39,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:39,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:39,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:39,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:39,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:40,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:41,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:43,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:39:43,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:39:43,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:39:43,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 23:39:43,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:39:43,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:39:43,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:39:43,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 23:39:43,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:39:43,237 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:39:43,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:39:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:39:43,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:43,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:39:43,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:39:43,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:39:43,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:39:43,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:39:43,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:39:43,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:39:43,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:39:43,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:39:43,266 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:39:43,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715689855] [2020-10-27 23:39:43,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:39:43,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 23:39:43,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475532011] [2020-10-27 23:39:43,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:39:43,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:39:43,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:39:43,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:39:43,268 INFO L87 Difference]: Start difference. First operand 20148 states and 28201 transitions. Second operand 6 states. [2020-10-27 23:39:43,460 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 23:39:44,376 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 23:39:44,577 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 23:39:50,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:39:50,173 INFO L93 Difference]: Finished difference Result 61818 states and 85731 transitions. [2020-10-27 23:39:50,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:39:50,173 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-27 23:39:50,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:39:50,273 INFO L225 Difference]: With dead ends: 61818 [2020-10-27 23:39:50,274 INFO L226 Difference]: Without dead ends: 41833 [2020-10-27 23:39:50,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:39:50,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41833 states. [2020-10-27 23:39:54,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41833 to 28077. [2020-10-27 23:39:54,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28077 states. [2020-10-27 23:39:54,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28077 states to 28077 states and 38705 transitions. [2020-10-27 23:39:54,088 INFO L78 Accepts]: Start accepts. Automaton has 28077 states and 38705 transitions. Word has length 65 [2020-10-27 23:39:54,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:39:54,089 INFO L481 AbstractCegarLoop]: Abstraction has 28077 states and 38705 transitions. [2020-10-27 23:39:54,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:39:54,089 INFO L276 IsEmpty]: Start isEmpty. Operand 28077 states and 38705 transitions. [2020-10-27 23:39:54,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:39:54,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:39:54,094 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:39:54,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 23:39:54,094 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:39:54,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:39:54,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1892469305, now seen corresponding path program 1 times [2020-10-27 23:39:54,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:39:54,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074432477] [2020-10-27 23:39:54,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:39:54,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:39:54,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:54,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:54,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:54,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:54,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:54,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:54,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:55,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:55,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:55,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:58,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:59,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:39:59,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:39:59,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 23:39:59,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 23:39:59,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:39:59,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:39:59,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:39:59,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 23:39:59,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:39:59,305 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:39:59,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:39:59,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:39:59,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:59,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:39:59,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:39:59,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:39:59,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:39:59,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:39:59,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:39:59,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:39:59,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:39:59,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:39:59,332 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 23:39:59,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074432477] [2020-10-27 23:39:59,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:39:59,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:39:59,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934071828] [2020-10-27 23:39:59,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:39:59,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:39:59,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:39:59,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:39:59,334 INFO L87 Difference]: Start difference. First operand 28077 states and 38705 transitions. Second operand 7 states. [2020-10-27 23:39:59,544 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:40:00,255 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 23:40:00,506 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:40:00,667 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 23:40:00,852 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 23:40:02,204 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 23:40:02,389 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:40:04,234 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 23:40:06,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:40:06,424 INFO L93 Difference]: Finished difference Result 56275 states and 77353 transitions. [2020-10-27 23:40:06,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:40:06,425 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-10-27 23:40:06,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:40:06,511 INFO L225 Difference]: With dead ends: 56275 [2020-10-27 23:40:06,512 INFO L226 Difference]: Without dead ends: 41240 [2020-10-27 23:40:06,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:40:06,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41240 states. [2020-10-27 23:40:10,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41240 to 29789. [2020-10-27 23:40:10,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29789 states. [2020-10-27 23:40:10,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29789 states to 29789 states and 41048 transitions. [2020-10-27 23:40:10,551 INFO L78 Accepts]: Start accepts. Automaton has 29789 states and 41048 transitions. Word has length 65 [2020-10-27 23:40:10,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:40:10,551 INFO L481 AbstractCegarLoop]: Abstraction has 29789 states and 41048 transitions. [2020-10-27 23:40:10,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:40:10,552 INFO L276 IsEmpty]: Start isEmpty. Operand 29789 states and 41048 transitions. [2020-10-27 23:40:10,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:40:10,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:40:10,556 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:40:10,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 23:40:10,556 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:40:10,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:40:10,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1880589588, now seen corresponding path program 1 times [2020-10-27 23:40:10,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:40:10,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273194685] [2020-10-27 23:40:10,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:40:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:40:10,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:10,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:10,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:10,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:10,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:10,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:11,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:11,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:11,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:11,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:12,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:15,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:40:15,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:40:15,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 23:40:15,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:40:15,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:40:15,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:40:15,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:40:15,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 23:40:15,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:40:15,755 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:40:15,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:40:15,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:40:15,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:15,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:40:15,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:40:15,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:40:15,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:40:15,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:40:15,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:40:15,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:40:15,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:40:15,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:40:15,782 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:40:15,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273194685] [2020-10-27 23:40:15,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:40:15,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 23:40:15,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796533340] [2020-10-27 23:40:15,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:40:15,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:40:15,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:40:15,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:40:15,784 INFO L87 Difference]: Start difference. First operand 29789 states and 41048 transitions. Second operand 6 states. [2020-10-27 23:40:15,977 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 23:40:17,273 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 23:40:17,510 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 23:40:27,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:40:27,622 INFO L93 Difference]: Finished difference Result 105346 states and 143765 transitions. [2020-10-27 23:40:27,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:40:27,622 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-27 23:40:27,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:40:27,772 INFO L225 Difference]: With dead ends: 105346 [2020-10-27 23:40:27,772 INFO L226 Difference]: Without dead ends: 81093 [2020-10-27 23:40:27,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:40:27,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81093 states. [2020-10-27 23:40:35,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81093 to 50955. [2020-10-27 23:40:35,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50955 states. [2020-10-27 23:40:35,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50955 states to 50955 states and 69530 transitions. [2020-10-27 23:40:35,383 INFO L78 Accepts]: Start accepts. Automaton has 50955 states and 69530 transitions. Word has length 65 [2020-10-27 23:40:35,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:40:35,383 INFO L481 AbstractCegarLoop]: Abstraction has 50955 states and 69530 transitions. [2020-10-27 23:40:35,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:40:35,383 INFO L276 IsEmpty]: Start isEmpty. Operand 50955 states and 69530 transitions. [2020-10-27 23:40:35,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 23:40:35,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:40:35,388 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:40:35,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 23:40:35,389 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:40:35,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:40:35,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1739015828, now seen corresponding path program 1 times [2020-10-27 23:40:35,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:40:35,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260125085] [2020-10-27 23:40:35,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:40:35,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:40:35,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:35,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:35,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:36,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:36,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:40,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:40:40,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 23:40:40,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:40:40,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:40:40,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:40:40,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:40:40,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:40:40,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 23:40:40,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:40:40,580 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:40:40,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:40:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:40:40,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:40,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:40:40,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:40:40,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:40:40,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:40:40,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:40:40,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:40:40,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:40:40,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:40:40,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:40:40,604 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 23:40:40,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260125085] [2020-10-27 23:40:40,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:40:40,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:40:40,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168776028] [2020-10-27 23:40:40,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:40:40,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:40:40,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:40:40,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:40:40,606 INFO L87 Difference]: Start difference. First operand 50955 states and 69530 transitions. Second operand 4 states. [2020-10-27 23:40:41,234 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 23:40:47,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:40:47,065 INFO L93 Difference]: Finished difference Result 94742 states and 129442 transitions. [2020-10-27 23:40:47,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:40:47,066 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-27 23:40:47,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:40:47,132 INFO L225 Difference]: With dead ends: 94742 [2020-10-27 23:40:47,132 INFO L226 Difference]: Without dead ends: 49377 [2020-10-27 23:40:47,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:40:47,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49377 states. [2020-10-27 23:40:53,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49377 to 49377. [2020-10-27 23:40:53,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49377 states. [2020-10-27 23:40:53,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49377 states to 49377 states and 67074 transitions. [2020-10-27 23:40:53,872 INFO L78 Accepts]: Start accepts. Automaton has 49377 states and 67074 transitions. Word has length 66 [2020-10-27 23:40:53,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:40:53,872 INFO L481 AbstractCegarLoop]: Abstraction has 49377 states and 67074 transitions. [2020-10-27 23:40:53,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:40:53,872 INFO L276 IsEmpty]: Start isEmpty. Operand 49377 states and 67074 transitions. [2020-10-27 23:40:53,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 23:40:53,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:40:53,878 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:40:53,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 23:40:53,879 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:40:53,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:40:53,879 INFO L82 PathProgramCache]: Analyzing trace with hash -737935444, now seen corresponding path program 1 times [2020-10-27 23:40:53,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:40:53,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656860503] [2020-10-27 23:40:53,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:40:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:40:53,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:53,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:53,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:54,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:54,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:54,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:54,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:55,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:55,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:57,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:58,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:40:58,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 23:40:58,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:40:58,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 23:40:58,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:40:58,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:40:58,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 23:40:58,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 23:40:58,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:40:59,107 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:40:59,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:40:59,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:40:59,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:59,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:40:59,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:40:59,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:40:59,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:40:59,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:40:59,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:40:59,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:40:59,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:40:59,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:40:59,135 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 23:40:59,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656860503] [2020-10-27 23:40:59,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:40:59,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 23:40:59,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050734848] [2020-10-27 23:40:59,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:40:59,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:40:59,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:40:59,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:40:59,137 INFO L87 Difference]: Start difference. First operand 49377 states and 67074 transitions. Second operand 5 states. [2020-10-27 23:40:59,343 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 23:41:00,065 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 23:41:10,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:10,633 INFO L93 Difference]: Finished difference Result 117493 states and 160804 transitions. [2020-10-27 23:41:10,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 23:41:10,634 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-27 23:41:10,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:10,750 INFO L225 Difference]: With dead ends: 117493 [2020-10-27 23:41:10,750 INFO L226 Difference]: Without dead ends: 81348 [2020-10-27 23:41:10,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:41:10,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81348 states. [2020-10-27 23:41:21,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81348 to 81328. [2020-10-27 23:41:21,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81328 states. [2020-10-27 23:41:21,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81328 states to 81328 states and 109415 transitions. [2020-10-27 23:41:21,952 INFO L78 Accepts]: Start accepts. Automaton has 81328 states and 109415 transitions. Word has length 66 [2020-10-27 23:41:21,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:21,952 INFO L481 AbstractCegarLoop]: Abstraction has 81328 states and 109415 transitions. [2020-10-27 23:41:21,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:41:21,952 INFO L276 IsEmpty]: Start isEmpty. Operand 81328 states and 109415 transitions. [2020-10-27 23:41:21,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 23:41:21,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:21,957 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:41:21,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 23:41:21,957 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:21,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:21,961 INFO L82 PathProgramCache]: Analyzing trace with hash 880223785, now seen corresponding path program 1 times [2020-10-27 23:41:21,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:21,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87457443] [2020-10-27 23:41:21,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:21,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:22,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:22,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:22,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:26,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:26,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 23:41:26,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:41:26,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4781 [2020-10-27 23:41:26,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:26,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:41:26,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 23:41:26,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 23:41:26,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:26,955 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:41:26,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:26,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:26,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:26,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:26,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:26,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:41:26,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:26,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:26,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:26,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:26,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:26,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87457443] [2020-10-27 23:41:26,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:41:26,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 23:41:26,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505917555] [2020-10-27 23:41:26,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:41:26,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:26,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:41:26,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:41:26,980 INFO L87 Difference]: Start difference. First operand 81328 states and 109415 transitions. Second operand 6 states. [2020-10-27 23:41:27,194 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-27 23:41:27,927 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 23:41:28,125 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 23:41:41,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:41,219 INFO L93 Difference]: Finished difference Result 128020 states and 173689 transitions. [2020-10-27 23:41:41,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 23:41:41,220 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-27 23:41:41,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:41,382 INFO L225 Difference]: With dead ends: 128020 [2020-10-27 23:41:41,383 INFO L226 Difference]: Without dead ends: 103133 [2020-10-27 23:41:41,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:41:41,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103133 states. [2020-10-27 23:41:54,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103133 to 93559. [2020-10-27 23:41:54,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93559 states. [2020-10-27 23:41:54,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93559 states to 93559 states and 126514 transitions. [2020-10-27 23:41:54,853 INFO L78 Accepts]: Start accepts. Automaton has 93559 states and 126514 transitions. Word has length 66 [2020-10-27 23:41:54,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:54,854 INFO L481 AbstractCegarLoop]: Abstraction has 93559 states and 126514 transitions. [2020-10-27 23:41:54,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:41:54,854 INFO L276 IsEmpty]: Start isEmpty. Operand 93559 states and 126514 transitions. [2020-10-27 23:41:54,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 23:41:54,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:54,858 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 23:41:54,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 23:41:54,859 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:54,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:54,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1530113924, now seen corresponding path program 1 times [2020-10-27 23:41:54,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:54,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735274513] [2020-10-27 23:41:54,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:54,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:54,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:54,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:55,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:55,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:55,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:59,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:59,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 23:41:59,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:41:59,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 23:41:59,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:59,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:41:59,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 23:41:59,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 23:41:59,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:00,071 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:42:00,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:00,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:00,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:00,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:00,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:00,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:00,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:42:00,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:00,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:00,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:00,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:00,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:00,094 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:00,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735274513] [2020-10-27 23:42:00,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:00,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:42:00,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394431136] [2020-10-27 23:42:00,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:42:00,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:00,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:42:00,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:42:00,097 INFO L87 Difference]: Start difference. First operand 93559 states and 126514 transitions. Second operand 4 states. [2020-10-27 23:42:01,788 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 124