/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:35:16,686 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:35:16,689 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:35:16,728 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:35:16,729 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:35:16,730 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:35:16,732 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:35:16,735 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:35:16,737 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:35:16,738 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:35:16,739 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:35:16,741 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:35:16,741 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:35:16,743 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:35:16,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:35:16,746 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:35:16,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:35:16,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:35:16,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:35:16,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:35:16,755 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:35:16,756 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:35:16,758 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:35:16,759 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:35:16,780 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:35:16,781 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:35:16,781 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:35:16,785 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:35:16,786 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:35:16,787 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:35:16,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:35:16,791 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:35:16,793 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:35:16,794 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:35:16,796 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:35:16,796 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:35:16,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:35:16,798 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:35:16,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:35:16,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:35:16,801 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:35:16,802 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 [2020-10-29 13:35:16,862 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:35:16,863 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:35:16,865 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:35:16,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:35:16,867 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:35:16,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:35:16,867 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:35:16,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:35:16,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:35:16,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:35:16,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:35:16,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:35:16,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:35:16,869 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:35:16,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:35:16,869 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:35:16,870 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:35:16,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:35:16,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:35:16,870 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:35:16,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:35:16,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:35:16,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:35:16,872 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:35:16,872 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:35:16,873 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:35:16,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:35:16,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:35:16,873 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:35:16,873 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:35:17,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:35:17,327 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:35:17,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:35:17,332 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:35:17,333 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:35:17,334 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-29 13:35:17,420 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1ab320e4f/524e2814228849ab84c1961b817b4952/FLAG928df7b6f [2020-10-29 13:35:18,164 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:35:18,165 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-29 13:35:18,175 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1ab320e4f/524e2814228849ab84c1961b817b4952/FLAG928df7b6f [2020-10-29 13:35:18,453 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1ab320e4f/524e2814228849ab84c1961b817b4952 [2020-10-29 13:35:18,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:35:18,464 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:35:18,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:35:18,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:35:18,474 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:35:18,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:35:18" (1/1) ... [2020-10-29 13:35:18,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f40254e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:35:18, skipping insertion in model container [2020-10-29 13:35:18,480 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:35:18" (1/1) ... [2020-10-29 13:35:18,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:35:18,547 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:35:18,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:35:18,790 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:35:18,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:35:18,894 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:35:18,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:35:18 WrapperNode [2020-10-29 13:35:18,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:35:18,896 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:35:18,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:35:18,897 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:35:18,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:35:18" (1/1) ... [2020-10-29 13:35:18,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:35:18" (1/1) ... [2020-10-29 13:35:18,921 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:35:18" (1/1) ... [2020-10-29 13:35:18,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:35:18" (1/1) ... [2020-10-29 13:35:18,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:35:18" (1/1) ... [2020-10-29 13:35:18,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:35:18" (1/1) ... [2020-10-29 13:35:18,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:35:18" (1/1) ... [2020-10-29 13:35:18,950 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:35:18,951 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:35:18,951 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:35:18,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:35:18,952 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:35:18" (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 [2020-10-29 13:35:19,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:35:19,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:35:19,040 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:35:19,040 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:35:19,040 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:35:19,040 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:35:19,040 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:35:19,040 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:35:19,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:35:19,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:35:19,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:35:19,041 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:35:19,041 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:35:19,041 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:35:19,041 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:35:19,042 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:35:19,042 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:35:19,042 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:35:19,042 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:35:19,042 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:35:19,042 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:35:19,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:35:19,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:35:19,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:35:19,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:35:19,043 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:35:19,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:35:19,685 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:35:19,686 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:35:19,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:35:19 BoogieIcfgContainer [2020-10-29 13:35:19,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:35:19,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:35:19,690 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:35:19,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:35:19,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:35:18" (1/3) ... [2020-10-29 13:35:19,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f7abf19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:35:19, skipping insertion in model container [2020-10-29 13:35:19,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:35:18" (2/3) ... [2020-10-29 13:35:19,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f7abf19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:35:19, skipping insertion in model container [2020-10-29 13:35:19,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:35:19" (3/3) ... [2020-10-29 13:35:19,697 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-29 13:35:19,709 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:35:19,715 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:35:19,728 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:35:19,758 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:35:19,758 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:35:19,758 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:35:19,758 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:35:19,758 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:35:19,758 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:35:19,758 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:35:19,759 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:35:19,778 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states. [2020-10-29 13:35:19,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 13:35:19,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:35:19,788 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] [2020-10-29 13:35:19,788 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:35:19,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:35:19,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1066806879, now seen corresponding path program 1 times [2020-10-29 13:35:19,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:35:19,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158393763] [2020-10-29 13:35:19,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:35:20,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:35:20,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:20,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:20,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:20,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:22,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:35:22,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 13:35:22,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:35:22,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2561 [2020-10-29 13:35:22,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:35:22,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:35:22,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:35:22,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:35:22,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 13:35:22,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:35:22,920 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:35:22,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:35:22,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:35:22,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:22,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:35:22,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:35:22,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:35:22,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:35:22,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:35:22,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:35:22,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:35:22,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:35:22,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:35:22,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:35:22,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:35:22,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158393763] [2020-10-29 13:35:22,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:35:22,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:35:22,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418543151] [2020-10-29 13:35:22,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:35:22,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:35:23,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:35:23,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:35:23,003 INFO L87 Difference]: Start difference. First operand 94 states. Second operand 6 states. [2020-10-29 13:35:23,223 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:35:23,854 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:35:24,025 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:35:24,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:35:24,063 INFO L93 Difference]: Finished difference Result 362 states and 569 transitions. [2020-10-29 13:35:24,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:35:24,067 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-10-29 13:35:24,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:35:24,088 INFO L225 Difference]: With dead ends: 362 [2020-10-29 13:35:24,088 INFO L226 Difference]: Without dead ends: 276 [2020-10-29 13:35:24,092 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 [2020-10-29 13:35:24,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-29 13:35:24,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 147. [2020-10-29 13:35:24,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-29 13:35:24,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 218 transitions. [2020-10-29 13:35:24,195 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 218 transitions. Word has length 42 [2020-10-29 13:35:24,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:35:24,196 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 218 transitions. [2020-10-29 13:35:24,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:35:24,199 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 218 transitions. [2020-10-29 13:35:24,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 13:35:24,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:35:24,205 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] [2020-10-29 13:35:24,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:35:24,205 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:35:24,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:35:24,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1863424726, now seen corresponding path program 1 times [2020-10-29 13:35:24,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:35:24,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168107957] [2020-10-29 13:35:24,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:35:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:35:24,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:24,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:24,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:24,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:25,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:35:25,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 13:35:25,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:35:25,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1098 [2020-10-29 13:35:25,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:35:25,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:35:25,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:35:25,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 13:35:25,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 13:35:25,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 13:35:25,540 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:35:25,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:35:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:35:25,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:25,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:35:25,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:35:25,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:35:25,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:35:25,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:35:25,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:35:25,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:35:25,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:35:25,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:35:25,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:35:25,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:35:25,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168107957] [2020-10-29 13:35:25,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:35:25,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:35:25,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388122008] [2020-10-29 13:35:25,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:35:25,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:35:25,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:35:25,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:35:25,600 INFO L87 Difference]: Start difference. First operand 147 states and 218 transitions. Second operand 4 states. [2020-10-29 13:35:25,767 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:35:26,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:35:26,271 INFO L93 Difference]: Finished difference Result 361 states and 554 transitions. [2020-10-29 13:35:26,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:35:26,272 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-29 13:35:26,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:35:26,275 INFO L225 Difference]: With dead ends: 361 [2020-10-29 13:35:26,275 INFO L226 Difference]: Without dead ends: 238 [2020-10-29 13:35:26,277 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 [2020-10-29 13:35:26,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-29 13:35:26,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 235. [2020-10-29 13:35:26,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-29 13:35:26,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 356 transitions. [2020-10-29 13:35:26,309 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 356 transitions. Word has length 43 [2020-10-29 13:35:26,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:35:26,310 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 356 transitions. [2020-10-29 13:35:26,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:35:26,310 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 356 transitions. [2020-10-29 13:35:26,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 13:35:26,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:35:26,312 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] [2020-10-29 13:35:26,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:35:26,313 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:35:26,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:35:26,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1918500570, now seen corresponding path program 1 times [2020-10-29 13:35:26,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:35:26,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93508066] [2020-10-29 13:35:26,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:35:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:35:26,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:26,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:26,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:26,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:35:26,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 13:35:26,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:35:26,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 443 [2020-10-29 13:35:26,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:35:26,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:35:26,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:35:26,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 13:35:26,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 13:35:26,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:35:26,986 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:35:26,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:35:26,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:35:26,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:27,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:35:27,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:35:27,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:35:27,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-29 13:35:27,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:35:27,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:35:27,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:35:27,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:35:27,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:35:27,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:35:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:35:27,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93508066] [2020-10-29 13:35:27,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:35:27,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:35:27,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703623744] [2020-10-29 13:35:27,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:35:27,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:35:27,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:35:27,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:35:27,056 INFO L87 Difference]: Start difference. First operand 235 states and 356 transitions. Second operand 4 states. [2020-10-29 13:35:27,222 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:35:27,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:35:27,604 INFO L93 Difference]: Finished difference Result 593 states and 916 transitions. [2020-10-29 13:35:27,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:35:27,607 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-29 13:35:27,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:35:27,610 INFO L225 Difference]: With dead ends: 593 [2020-10-29 13:35:27,611 INFO L226 Difference]: Without dead ends: 382 [2020-10-29 13:35:27,613 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 [2020-10-29 13:35:27,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-10-29 13:35:27,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 379. [2020-10-29 13:35:27,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-10-29 13:35:27,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 578 transitions. [2020-10-29 13:35:27,668 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 578 transitions. Word has length 44 [2020-10-29 13:35:27,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:35:27,669 INFO L481 AbstractCegarLoop]: Abstraction has 379 states and 578 transitions. [2020-10-29 13:35:27,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:35:27,669 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 578 transitions. [2020-10-29 13:35:27,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 13:35:27,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:35:27,671 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] [2020-10-29 13:35:27,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:35:27,671 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:35:27,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:35:27,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1236853102, now seen corresponding path program 1 times [2020-10-29 13:35:27,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:35:27,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156574408] [2020-10-29 13:35:27,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:35:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:35:27,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:27,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:27,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:35:27,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 13:35:27,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:35:27,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-29 13:35:27,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:35:27,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:35:27,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:35:27,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 13:35:27,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 13:35:27,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:35:28,154 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:35:28,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:35:28,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:35:28,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:28,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:35:28,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:35:28,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:35:28,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:35:28,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:35:28,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:35:28,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:35:28,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:35:28,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:35:28,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:35:28,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:35:28,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156574408] [2020-10-29 13:35:28,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:35:28,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:35:28,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202452748] [2020-10-29 13:35:28,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:35:28,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:35:28,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:35:28,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:35:28,187 INFO L87 Difference]: Start difference. First operand 379 states and 578 transitions. Second operand 4 states. [2020-10-29 13:35:28,327 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:35:28,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:35:28,762 INFO L93 Difference]: Finished difference Result 961 states and 1478 transitions. [2020-10-29 13:35:28,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:35:28,763 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-29 13:35:28,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:35:28,769 INFO L225 Difference]: With dead ends: 961 [2020-10-29 13:35:28,769 INFO L226 Difference]: Without dead ends: 606 [2020-10-29 13:35:28,771 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 [2020-10-29 13:35:28,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2020-10-29 13:35:28,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 603. [2020-10-29 13:35:28,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-10-29 13:35:28,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 914 transitions. [2020-10-29 13:35:28,827 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 914 transitions. Word has length 45 [2020-10-29 13:35:28,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:35:28,829 INFO L481 AbstractCegarLoop]: Abstraction has 603 states and 914 transitions. [2020-10-29 13:35:28,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:35:28,829 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 914 transitions. [2020-10-29 13:35:28,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 13:35:28,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:35:28,833 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] [2020-10-29 13:35:28,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:35:28,833 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:35:28,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:35:28,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1167890461, now seen corresponding path program 1 times [2020-10-29 13:35:28,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:35:28,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254956385] [2020-10-29 13:35:28,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:35:28,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:35:28,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:28,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:29,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:35:29,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 13:35:29,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:35:29,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-10-29 13:35:29,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:35:29,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:35:29,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:35:29,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:35:29,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 13:35:29,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:35:29,438 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:35:29,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:35:29,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:35:29,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:29,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:35:29,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:35:29,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:35:29,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-29 13:35:29,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:35:29,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:35:29,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:35:29,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:35:29,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:35:29,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:35:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:35:29,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254956385] [2020-10-29 13:35:29,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:35:29,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:35:29,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110690010] [2020-10-29 13:35:29,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:35:29,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:35:29,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:35:29,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:35:29,501 INFO L87 Difference]: Start difference. First operand 603 states and 914 transitions. Second operand 6 states. [2020-10-29 13:35:29,970 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:35:30,106 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:35:30,240 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:35:30,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:35:30,682 INFO L93 Difference]: Finished difference Result 2076 states and 3152 transitions. [2020-10-29 13:35:30,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:35:30,682 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-29 13:35:30,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:35:30,692 INFO L225 Difference]: With dead ends: 2076 [2020-10-29 13:35:30,693 INFO L226 Difference]: Without dead ends: 1497 [2020-10-29 13:35:30,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:35:30,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2020-10-29 13:35:30,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1491. [2020-10-29 13:35:30,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1491 states. [2020-10-29 13:35:30,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 2242 transitions. [2020-10-29 13:35:30,818 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 2242 transitions. Word has length 46 [2020-10-29 13:35:30,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:35:30,818 INFO L481 AbstractCegarLoop]: Abstraction has 1491 states and 2242 transitions. [2020-10-29 13:35:30,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:35:30,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 2242 transitions. [2020-10-29 13:35:30,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 13:35:30,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:35:30,830 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, 1] [2020-10-29 13:35:30,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:35:30,831 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:35:30,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:35:30,831 INFO L82 PathProgramCache]: Analyzing trace with hash -254185062, now seen corresponding path program 1 times [2020-10-29 13:35:30,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:35:30,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259690982] [2020-10-29 13:35:30,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:35:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:35:30,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:31,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:31,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:35:31,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 13:35:31,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:35:31,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 409 [2020-10-29 13:35:31,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:35:31,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:35:31,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:35:31,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:35:31,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 13:35:31,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:35:31,499 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:35:31,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:35:31,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:35:31,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:31,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:35:31,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:35:31,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:35:31,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 13:35:31,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:35:31,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:35:31,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:35:31,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:35:31,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:35:31,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:35:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:35:31,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259690982] [2020-10-29 13:35:31,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:35:31,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:35:31,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561920886] [2020-10-29 13:35:31,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:35:31,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:35:31,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:35:31,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:35:31,561 INFO L87 Difference]: Start difference. First operand 1491 states and 2242 transitions. Second operand 6 states. [2020-10-29 13:35:31,741 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:35:32,323 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:35:32,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:35:32,514 INFO L93 Difference]: Finished difference Result 4385 states and 6598 transitions. [2020-10-29 13:35:32,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:35:32,515 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2020-10-29 13:35:32,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:35:32,532 INFO L225 Difference]: With dead ends: 4385 [2020-10-29 13:35:32,532 INFO L226 Difference]: Without dead ends: 2918 [2020-10-29 13:35:32,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:35:32,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2918 states. [2020-10-29 13:35:32,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2918 to 2915. [2020-10-29 13:35:32,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2915 states. [2020-10-29 13:35:32,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2915 states to 2915 states and 4338 transitions. [2020-10-29 13:35:32,804 INFO L78 Accepts]: Start accepts. Automaton has 2915 states and 4338 transitions. Word has length 48 [2020-10-29 13:35:32,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:35:32,807 INFO L481 AbstractCegarLoop]: Abstraction has 2915 states and 4338 transitions. [2020-10-29 13:35:32,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:35:32,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2915 states and 4338 transitions. [2020-10-29 13:35:32,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 13:35:32,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:35:32,810 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, 1] [2020-10-29 13:35:32,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:35:32,810 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:35:32,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:35:32,811 INFO L82 PathProgramCache]: Analyzing trace with hash 268846869, now seen corresponding path program 1 times [2020-10-29 13:35:32,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:35:32,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353593012] [2020-10-29 13:35:32,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:35:32,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:35:32,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:32,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:35:32,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 13:35:32,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:35:32,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-29 13:35:32,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:35:32,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:35:32,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:35:32,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-29 13:35:32,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 13:35:32,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:35:33,198 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:35:33,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:35:33,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:35:33,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:33,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:35:33,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:35:33,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:35:33,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-29 13:35:33,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:35:33,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:35:33,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:35:33,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:35:33,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:35:33,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:35:33,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:35:33,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353593012] [2020-10-29 13:35:33,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:35:33,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:35:33,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493877936] [2020-10-29 13:35:33,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:35:33,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:35:33,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:35:33,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:35:33,245 INFO L87 Difference]: Start difference. First operand 2915 states and 4338 transitions. Second operand 5 states. [2020-10-29 13:35:34,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:35:34,175 INFO L93 Difference]: Finished difference Result 5998 states and 8844 transitions. [2020-10-29 13:35:34,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:35:34,176 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-10-29 13:35:34,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:35:34,208 INFO L225 Difference]: With dead ends: 5998 [2020-10-29 13:35:34,209 INFO L226 Difference]: Without dead ends: 5995 [2020-10-29 13:35:34,215 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 [2020-10-29 13:35:34,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5995 states. [2020-10-29 13:35:34,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5995 to 3107. [2020-10-29 13:35:34,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3107 states. [2020-10-29 13:35:34,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3107 states to 3107 states and 4530 transitions. [2020-10-29 13:35:34,559 INFO L78 Accepts]: Start accepts. Automaton has 3107 states and 4530 transitions. Word has length 48 [2020-10-29 13:35:34,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:35:34,559 INFO L481 AbstractCegarLoop]: Abstraction has 3107 states and 4530 transitions. [2020-10-29 13:35:34,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:35:34,560 INFO L276 IsEmpty]: Start isEmpty. Operand 3107 states and 4530 transitions. [2020-10-29 13:35:34,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 13:35:34,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:35:34,561 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, 1, 1] [2020-10-29 13:35:34,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:35:34,561 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:35:34,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:35:34,562 INFO L82 PathProgramCache]: Analyzing trace with hash 42346085, now seen corresponding path program 1 times [2020-10-29 13:35:34,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:35:34,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085981556] [2020-10-29 13:35:34,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:35:34,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:35:34,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:34,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:35:34,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 13:35:34,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:35:34,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-29 13:35:34,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:35:34,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:35:34,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:35:34,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:35:34,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 13:35:34,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:35:34,879 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:35:34,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:35:34,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:35:34,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:34,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:35:34,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:35:34,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:35:34,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:35:34,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:35:34,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:35:34,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:35:34,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:35:34,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:35:34,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:35:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:35:34,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085981556] [2020-10-29 13:35:34,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:35:34,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:35:34,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164420407] [2020-10-29 13:35:34,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:35:34,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:35:34,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:35:34,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:35:34,919 INFO L87 Difference]: Start difference. First operand 3107 states and 4530 transitions. Second operand 4 states. [2020-10-29 13:35:35,062 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:35:35,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:35:35,721 INFO L93 Difference]: Finished difference Result 6863 states and 9992 transitions. [2020-10-29 13:35:35,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:35:35,722 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-10-29 13:35:35,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:35:35,745 INFO L225 Difference]: With dead ends: 6863 [2020-10-29 13:35:35,745 INFO L226 Difference]: Without dead ends: 3780 [2020-10-29 13:35:35,755 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 [2020-10-29 13:35:35,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3780 states. [2020-10-29 13:35:36,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3780 to 3777. [2020-10-29 13:35:36,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3777 states. [2020-10-29 13:35:36,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3777 states to 3777 states and 5464 transitions. [2020-10-29 13:35:36,116 INFO L78 Accepts]: Start accepts. Automaton has 3777 states and 5464 transitions. Word has length 49 [2020-10-29 13:35:36,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:35:36,118 INFO L481 AbstractCegarLoop]: Abstraction has 3777 states and 5464 transitions. [2020-10-29 13:35:36,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:35:36,120 INFO L276 IsEmpty]: Start isEmpty. Operand 3777 states and 5464 transitions. [2020-10-29 13:35:36,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 13:35:36,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:35:36,124 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] [2020-10-29 13:35:36,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:35:36,124 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:35:36,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:35:36,125 INFO L82 PathProgramCache]: Analyzing trace with hash -682566351, now seen corresponding path program 1 times [2020-10-29 13:35:36,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:35:36,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588262034] [2020-10-29 13:35:36,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:35:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:35:36,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:36,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:36,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:38,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:35:38,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 13:35:38,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:35:38,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2189 [2020-10-29 13:35:38,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:35:38,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:35:38,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:35:38,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:35:38,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 13:35:38,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:35:38,573 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:35:38,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:35:38,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:35:38,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:38,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:35:38,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:35:38,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:35:38,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:35:38,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:35:38,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:35:38,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:35:38,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:35:38,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:35:38,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:35:38,639 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 13:35:38,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588262034] [2020-10-29 13:35:38,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:35:38,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 13:35:38,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348213261] [2020-10-29 13:35:38,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:35:38,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:35:38,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:35:38,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:35:38,645 INFO L87 Difference]: Start difference. First operand 3777 states and 5464 transitions. Second operand 5 states. [2020-10-29 13:35:38,835 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:35:39,406 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:35:39,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:35:39,906 INFO L93 Difference]: Finished difference Result 9434 states and 13666 transitions. [2020-10-29 13:35:39,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:35:39,906 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-29 13:35:39,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:35:39,940 INFO L225 Difference]: With dead ends: 9434 [2020-10-29 13:35:39,940 INFO L226 Difference]: Without dead ends: 6351 [2020-10-29 13:35:39,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:35:39,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6351 states. [2020-10-29 13:35:40,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6351 to 6345. [2020-10-29 13:35:40,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6345 states. [2020-10-29 13:35:40,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6345 states to 6345 states and 9068 transitions. [2020-10-29 13:35:40,526 INFO L78 Accepts]: Start accepts. Automaton has 6345 states and 9068 transitions. Word has length 66 [2020-10-29 13:35:40,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:35:40,526 INFO L481 AbstractCegarLoop]: Abstraction has 6345 states and 9068 transitions. [2020-10-29 13:35:40,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:35:40,527 INFO L276 IsEmpty]: Start isEmpty. Operand 6345 states and 9068 transitions. [2020-10-29 13:35:40,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:35:40,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:35:40,530 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, 1] [2020-10-29 13:35:40,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:35:40,531 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:35:40,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:35:40,531 INFO L82 PathProgramCache]: Analyzing trace with hash -32592006, now seen corresponding path program 1 times [2020-10-29 13:35:40,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:35:40,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023572657] [2020-10-29 13:35:40,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:35:40,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:35:40,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:40,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:41,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:42,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:35:42,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:35:42,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:35:42,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1708 [2020-10-29 13:35:42,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:35:42,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:35:42,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:35:42,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:35:42,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 13:35:42,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:35:42,454 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:35:42,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:35:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:35:42,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:42,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:35:42,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:35:42,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:35:42,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:35:42,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:35:42,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:35:42,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:35:42,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:35:42,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:35:42,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:35:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 13:35:42,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023572657] [2020-10-29 13:35:42,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:35:42,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:35:42,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586764657] [2020-10-29 13:35:42,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:35:42,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:35:42,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:35:42,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:35:42,496 INFO L87 Difference]: Start difference. First operand 6345 states and 9068 transitions. Second operand 6 states. [2020-10-29 13:35:42,661 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:35:43,329 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:35:44,090 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:35:44,236 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-29 13:35:44,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:35:44,530 INFO L93 Difference]: Finished difference Result 14895 states and 21569 transitions. [2020-10-29 13:35:44,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:35:44,531 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-29 13:35:44,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:35:44,590 INFO L225 Difference]: With dead ends: 14895 [2020-10-29 13:35:44,590 INFO L226 Difference]: Without dead ends: 11940 [2020-10-29 13:35:44,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:35:44,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11940 states. [2020-10-29 13:35:45,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11940 to 10407. [2020-10-29 13:35:45,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10407 states. [2020-10-29 13:35:45,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10407 states to 10407 states and 14880 transitions. [2020-10-29 13:35:45,582 INFO L78 Accepts]: Start accepts. Automaton has 10407 states and 14880 transitions. Word has length 67 [2020-10-29 13:35:45,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:35:45,582 INFO L481 AbstractCegarLoop]: Abstraction has 10407 states and 14880 transitions. [2020-10-29 13:35:45,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:35:45,582 INFO L276 IsEmpty]: Start isEmpty. Operand 10407 states and 14880 transitions. [2020-10-29 13:35:45,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:35:45,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:35:45,586 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, 1] [2020-10-29 13:35:45,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:35:45,587 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:35:45,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:35:45,587 INFO L82 PathProgramCache]: Analyzing trace with hash 2055366417, now seen corresponding path program 1 times [2020-10-29 13:35:45,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:35:45,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340511443] [2020-10-29 13:35:45,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:35:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:35:45,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:45,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:45,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:45,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:46,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:47,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:50,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:50,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:35:50,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:35:50,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:35:50,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:35:50,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:35:50,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:35:50,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:35:50,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:35:50,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 13:35:50,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:35:50,789 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:35:50,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:35:50,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:35:50,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:50,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:35:50,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:35:50,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:35:50,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:35:50,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:35:50,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:35:50,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:35:50,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:35:50,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:35:50,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:35:50,829 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 13:35:50,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340511443] [2020-10-29 13:35:50,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:35:50,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:35:50,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004211596] [2020-10-29 13:35:50,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:35:50,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:35:50,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:35:50,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:35:50,832 INFO L87 Difference]: Start difference. First operand 10407 states and 14880 transitions. Second operand 6 states. [2020-10-29 13:35:51,005 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:35:51,605 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:35:52,331 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:35:52,482 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-29 13:35:52,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:35:52,768 INFO L93 Difference]: Finished difference Result 15809 states and 22596 transitions. [2020-10-29 13:35:52,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:35:52,769 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-29 13:35:52,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:35:52,801 INFO L225 Difference]: With dead ends: 15809 [2020-10-29 13:35:52,802 INFO L226 Difference]: Without dead ends: 13494 [2020-10-29 13:35:52,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:35:52,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13494 states. [2020-10-29 13:35:53,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13494 to 11605. [2020-10-29 13:35:53,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11605 states. [2020-10-29 13:35:53,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11605 states to 11605 states and 16580 transitions. [2020-10-29 13:35:53,671 INFO L78 Accepts]: Start accepts. Automaton has 11605 states and 16580 transitions. Word has length 67 [2020-10-29 13:35:53,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:35:53,672 INFO L481 AbstractCegarLoop]: Abstraction has 11605 states and 16580 transitions. [2020-10-29 13:35:53,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:35:53,672 INFO L276 IsEmpty]: Start isEmpty. Operand 11605 states and 16580 transitions. [2020-10-29 13:35:53,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:35:53,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:35:53,675 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, 1] [2020-10-29 13:35:53,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:35:53,676 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:35:53,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:35:53,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1445255943, now seen corresponding path program 1 times [2020-10-29 13:35:53,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:35:53,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640346361] [2020-10-29 13:35:53,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:35:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:35:53,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:53,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:53,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:53,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:53,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:54,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:54,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:58,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:35:58,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:35:58,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:35:58,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 13:35:58,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:35:58,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:35:58,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:35:58,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:35:58,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 13:35:58,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:35:58,891 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:35:58,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:35:58,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:35:58,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:35:58,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:35:58,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:35:58,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:35:58,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:35:58,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:35:58,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:35:58,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:35:58,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:35:58,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:35:58,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:35:58,933 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 13:35:58,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640346361] [2020-10-29 13:35:58,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:35:58,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:35:58,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014051796] [2020-10-29 13:35:58,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:35:58,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:35:58,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:35:58,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:35:58,936 INFO L87 Difference]: Start difference. First operand 11605 states and 16580 transitions. Second operand 6 states. [2020-10-29 13:35:59,099 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:35:59,779 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:36:00,497 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:36:00,636 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-29 13:36:00,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:36:00,939 INFO L93 Difference]: Finished difference Result 18700 states and 26793 transitions. [2020-10-29 13:36:00,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:36:00,939 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-29 13:36:00,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:36:00,978 INFO L225 Difference]: With dead ends: 18700 [2020-10-29 13:36:00,979 INFO L226 Difference]: Without dead ends: 15013 [2020-10-29 13:36:00,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:36:01,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15013 states. [2020-10-29 13:36:01,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15013 to 12617. [2020-10-29 13:36:01,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12617 states. [2020-10-29 13:36:01,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12617 states to 12617 states and 18000 transitions. [2020-10-29 13:36:01,947 INFO L78 Accepts]: Start accepts. Automaton has 12617 states and 18000 transitions. Word has length 67 [2020-10-29 13:36:01,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:36:01,947 INFO L481 AbstractCegarLoop]: Abstraction has 12617 states and 18000 transitions. [2020-10-29 13:36:01,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:36:01,947 INFO L276 IsEmpty]: Start isEmpty. Operand 12617 states and 18000 transitions. [2020-10-29 13:36:01,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:36:01,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:36:01,952 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, 1, 1, 1, 1] [2020-10-29 13:36:01,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:36:01,952 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:36:01,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:36:01,953 INFO L82 PathProgramCache]: Analyzing trace with hash -427338185, now seen corresponding path program 1 times [2020-10-29 13:36:01,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:36:01,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475027081] [2020-10-29 13:36:01,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:36:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:01,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:02,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:02,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:02,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:02,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:07,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:07,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:36:07,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:36:07,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-29 13:36:07,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:07,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:07,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:36:07,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:36:07,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 13:36:07,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:07,216 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:36:07,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:36:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:07,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:07,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:07,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:36:07,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:36:07,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 13:36:07,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:07,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:07,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:36:07,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:36:07,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:36:07,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:07,274 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:36:07,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475027081] [2020-10-29 13:36:07,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:36:07,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:36:07,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042812955] [2020-10-29 13:36:07,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:36:07,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:36:07,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:36:07,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:36:07,276 INFO L87 Difference]: Start difference. First operand 12617 states and 18000 transitions. Second operand 8 states. [2020-10-29 13:36:07,445 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-29 13:36:08,363 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:36:08,620 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:36:10,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:36:10,249 INFO L93 Difference]: Finished difference Result 42816 states and 60888 transitions. [2020-10-29 13:36:10,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:36:10,250 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-29 13:36:10,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:36:10,331 INFO L225 Difference]: With dead ends: 42816 [2020-10-29 13:36:10,331 INFO L226 Difference]: Without dead ends: 30225 [2020-10-29 13:36:10,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:36:10,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30225 states. [2020-10-29 13:36:11,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30225 to 16659. [2020-10-29 13:36:11,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16659 states. [2020-10-29 13:36:11,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16659 states to 16659 states and 23273 transitions. [2020-10-29 13:36:11,982 INFO L78 Accepts]: Start accepts. Automaton has 16659 states and 23273 transitions. Word has length 70 [2020-10-29 13:36:11,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:36:11,982 INFO L481 AbstractCegarLoop]: Abstraction has 16659 states and 23273 transitions. [2020-10-29 13:36:11,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:36:11,983 INFO L276 IsEmpty]: Start isEmpty. Operand 16659 states and 23273 transitions. [2020-10-29 13:36:11,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:36:11,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:36:11,988 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, 1, 1, 1, 1] [2020-10-29 13:36:11,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:36:11,989 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:36:11,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:36:11,989 INFO L82 PathProgramCache]: Analyzing trace with hash -802110271, now seen corresponding path program 1 times [2020-10-29 13:36:11,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:36:11,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15435565] [2020-10-29 13:36:11,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:36:12,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:12,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:12,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:12,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:12,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:12,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:12,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:13,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:13,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:13,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:17,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:17,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:36:17,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:36:17,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:36:17,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:17,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:17,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:36:17,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 13:36:17,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 13:36:17,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:17,220 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:36:17,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:36:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:17,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:17,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:17,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:36:17,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:36:17,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:36:17,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:17,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:17,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:36:17,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:36:17,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:36:17,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:36:17,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15435565] [2020-10-29 13:36:17,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:36:17,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 13:36:17,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004186833] [2020-10-29 13:36:17,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:36:17,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:36:17,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:36:17,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:36:17,260 INFO L87 Difference]: Start difference. First operand 16659 states and 23273 transitions. Second operand 8 states. [2020-10-29 13:36:17,416 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:36:18,659 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:36:18,876 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:36:19,068 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:36:21,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:36:21,939 INFO L93 Difference]: Finished difference Result 62056 states and 86089 transitions. [2020-10-29 13:36:21,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 13:36:21,940 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-29 13:36:21,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:36:22,041 INFO L225 Difference]: With dead ends: 62056 [2020-10-29 13:36:22,042 INFO L226 Difference]: Without dead ends: 45423 [2020-10-29 13:36:22,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-10-29 13:36:22,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45423 states. [2020-10-29 13:36:24,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45423 to 27564. [2020-10-29 13:36:24,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27564 states. [2020-10-29 13:36:24,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27564 states to 27564 states and 38461 transitions. [2020-10-29 13:36:24,630 INFO L78 Accepts]: Start accepts. Automaton has 27564 states and 38461 transitions. Word has length 70 [2020-10-29 13:36:24,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:36:24,630 INFO L481 AbstractCegarLoop]: Abstraction has 27564 states and 38461 transitions. [2020-10-29 13:36:24,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:36:24,630 INFO L276 IsEmpty]: Start isEmpty. Operand 27564 states and 38461 transitions. [2020-10-29 13:36:24,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:36:24,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:36:24,636 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, 1, 1, 1, 1] [2020-10-29 13:36:24,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:36:24,636 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:36:24,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:36:24,637 INFO L82 PathProgramCache]: Analyzing trace with hash 835046990, now seen corresponding path program 1 times [2020-10-29 13:36:24,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:36:24,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834597799] [2020-10-29 13:36:24,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:36:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:24,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:24,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:24,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:24,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:24,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:25,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:25,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:25,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:25,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:25,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:25,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:25,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:27,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:29,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:29,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:36:29,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:36:29,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:36:29,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:29,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:29,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:36:29,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:36:29,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 13:36:29,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:29,887 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:36:29,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:36:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:29,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:29,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:29,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:36:29,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:36:29,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:36:29,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:29,920 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:29,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:36:29,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:36:29,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:36:29,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:36:29,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834597799] [2020-10-29 13:36:29,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:36:29,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:36:29,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770531918] [2020-10-29 13:36:29,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:36:29,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:36:29,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:36:29,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:36:29,941 INFO L87 Difference]: Start difference. First operand 27564 states and 38461 transitions. Second operand 8 states. [2020-10-29 13:36:30,122 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:36:31,320 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-29 13:36:31,637 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:36:36,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:36:36,269 INFO L93 Difference]: Finished difference Result 69948 states and 97036 transitions. [2020-10-29 13:36:36,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:36:36,269 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-29 13:36:36,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:36:36,417 INFO L225 Difference]: With dead ends: 69948 [2020-10-29 13:36:36,417 INFO L226 Difference]: Without dead ends: 57195 [2020-10-29 13:36:36,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:36:36,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57195 states. [2020-10-29 13:36:39,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57195 to 34319. [2020-10-29 13:36:39,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34319 states. [2020-10-29 13:36:39,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34319 states to 34319 states and 48245 transitions. [2020-10-29 13:36:39,945 INFO L78 Accepts]: Start accepts. Automaton has 34319 states and 48245 transitions. Word has length 70 [2020-10-29 13:36:39,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:36:39,946 INFO L481 AbstractCegarLoop]: Abstraction has 34319 states and 48245 transitions. [2020-10-29 13:36:39,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:36:39,946 INFO L276 IsEmpty]: Start isEmpty. Operand 34319 states and 48245 transitions. [2020-10-29 13:36:39,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:36:39,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:36:39,951 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, 1, 1, 1, 1] [2020-10-29 13:36:39,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:36:39,952 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:36:39,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:36:39,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1746733969, now seen corresponding path program 1 times [2020-10-29 13:36:39,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:36:39,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049209563] [2020-10-29 13:36:39,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:36:39,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:39,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:40,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:40,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:40,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:40,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:40,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:41,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:41,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:41,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:41,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:42,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:43,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:43,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:44,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:44,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:36:44,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:36:44,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:36:44,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:44,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:44,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:36:44,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:36:44,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 13:36:44,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:45,238 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:36:45,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:36:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:45,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:45,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:45,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:36:45,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:36:45,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:36:45,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:45,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:45,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:36:45,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:36:45,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:36:45,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:36:45,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049209563] [2020-10-29 13:36:45,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:36:45,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:36:45,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712489867] [2020-10-29 13:36:45,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:36:45,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:36:45,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:36:45,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:36:45,301 INFO L87 Difference]: Start difference. First operand 34319 states and 48245 transitions. Second operand 8 states. [2020-10-29 13:36:45,472 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:36:46,491 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:36:46,737 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:36:50,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:36:50,730 INFO L93 Difference]: Finished difference Result 73335 states and 102623 transitions. [2020-10-29 13:36:50,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:36:50,730 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-29 13:36:50,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:36:50,801 INFO L225 Difference]: With dead ends: 73335 [2020-10-29 13:36:50,802 INFO L226 Difference]: Without dead ends: 45544 [2020-10-29 13:36:50,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:36:50,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45544 states. [2020-10-29 13:36:54,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45544 to 28594. [2020-10-29 13:36:54,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28594 states. [2020-10-29 13:36:54,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28594 states to 28594 states and 39365 transitions. [2020-10-29 13:36:54,293 INFO L78 Accepts]: Start accepts. Automaton has 28594 states and 39365 transitions. Word has length 70 [2020-10-29 13:36:54,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:36:54,293 INFO L481 AbstractCegarLoop]: Abstraction has 28594 states and 39365 transitions. [2020-10-29 13:36:54,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:36:54,293 INFO L276 IsEmpty]: Start isEmpty. Operand 28594 states and 39365 transitions. [2020-10-29 13:36:54,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:36:54,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:36:54,299 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, 1, 1, 1, 1, 1, 1] [2020-10-29 13:36:54,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:36:54,299 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:36:54,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:36:54,299 INFO L82 PathProgramCache]: Analyzing trace with hash 636139392, now seen corresponding path program 1 times [2020-10-29 13:36:54,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:36:54,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771704415] [2020-10-29 13:36:54,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:36:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:54,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:54,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:54,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:54,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:55,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:55,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:55,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:55,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:55,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:55,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:55,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:56,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:56,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:57,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:59,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:59,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:36:59,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:36:59,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:36:59,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:59,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:59,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:36:59,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:36:59,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 13:36:59,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:59,568 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:36:59,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:36:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:59,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:59,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:59,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:36:59,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:36:59,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 13:36:59,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:59,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:59,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:36:59,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:36:59,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:36:59,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:59,636 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:36:59,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771704415] [2020-10-29 13:36:59,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:36:59,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 13:36:59,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420171576] [2020-10-29 13:36:59,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:36:59,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:36:59,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:36:59,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:36:59,638 INFO L87 Difference]: Start difference. First operand 28594 states and 39365 transitions. Second operand 9 states. [2020-10-29 13:36:59,803 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:37:01,510 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:37:01,929 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:37:12,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:12,311 INFO L93 Difference]: Finished difference Result 122498 states and 166683 transitions. [2020-10-29 13:37:12,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 13:37:12,312 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-29 13:37:12,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:12,631 INFO L225 Difference]: With dead ends: 122498 [2020-10-29 13:37:12,632 INFO L226 Difference]: Without dead ends: 98047 [2020-10-29 13:37:12,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2020-10-29 13:37:12,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98047 states. [2020-10-29 13:37:17,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98047 to 31776. [2020-10-29 13:37:17,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31776 states. [2020-10-29 13:37:17,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31776 states to 31776 states and 43612 transitions. [2020-10-29 13:37:17,277 INFO L78 Accepts]: Start accepts. Automaton has 31776 states and 43612 transitions. Word has length 72 [2020-10-29 13:37:17,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:17,278 INFO L481 AbstractCegarLoop]: Abstraction has 31776 states and 43612 transitions. [2020-10-29 13:37:17,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:37:17,278 INFO L276 IsEmpty]: Start isEmpty. Operand 31776 states and 43612 transitions. [2020-10-29 13:37:17,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:37:17,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:17,282 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, 1, 1, 1, 1, 1, 1] [2020-10-29 13:37:17,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:37:17,282 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:17,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:17,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1753602203, now seen corresponding path program 1 times [2020-10-29 13:37:17,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:17,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045946983] [2020-10-29 13:37:17,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:17,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:17,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:17,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:17,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:18,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:18,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:21,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:21,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:37:21,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:37:21,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4135 [2020-10-29 13:37:21,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:21,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:21,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:37:21,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:37:21,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 13:37:21,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:21,811 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:37:21,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:21,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:21,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:21,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:21,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:21,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:37:21,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:21,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:21,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:37:21,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:21,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:37:21,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:21,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:37:21,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045946983] [2020-10-29 13:37:21,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:37:21,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 13:37:21,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953216079] [2020-10-29 13:37:21,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:37:21,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:21,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:37:21,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:37:21,857 INFO L87 Difference]: Start difference. First operand 31776 states and 43612 transitions. Second operand 10 states. [2020-10-29 13:37:22,040 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:37:24,269 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:37:27,407 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:37:41,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:41,019 INFO L93 Difference]: Finished difference Result 145906 states and 198890 transitions. [2020-10-29 13:37:41,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 13:37:41,019 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 72 [2020-10-29 13:37:41,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:41,310 INFO L225 Difference]: With dead ends: 145906 [2020-10-29 13:37:41,310 INFO L226 Difference]: Without dead ends: 114156 [2020-10-29 13:37:41,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=194, Invalid=562, Unknown=0, NotChecked=0, Total=756 [2020-10-29 13:37:41,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114156 states. [2020-10-29 13:37:50,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114156 to 56993. [2020-10-29 13:37:50,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56993 states. [2020-10-29 13:37:50,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56993 states to 56993 states and 78040 transitions. [2020-10-29 13:37:50,796 INFO L78 Accepts]: Start accepts. Automaton has 56993 states and 78040 transitions. Word has length 72 [2020-10-29 13:37:50,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:50,797 INFO L481 AbstractCegarLoop]: Abstraction has 56993 states and 78040 transitions. [2020-10-29 13:37:50,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 13:37:50,797 INFO L276 IsEmpty]: Start isEmpty. Operand 56993 states and 78040 transitions. [2020-10-29 13:37:50,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:37:50,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:50,801 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, 1, 1, 1, 1, 1, 1] [2020-10-29 13:37:50,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 13:37:50,801 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:50,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:50,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1476624200, now seen corresponding path program 1 times [2020-10-29 13:37:50,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:50,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870350699] [2020-10-29 13:37:50,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:50,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:50,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:50,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:50,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:50,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:51,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:51,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:51,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:52,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:52,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:52,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:53,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:54,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:54,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:54,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:54,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:54,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:55,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:55,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:37:55,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 13:37:55,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:37:55,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:55,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:55,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:37:55,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:37:55,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 13:37:55,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:56,079 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:37:56,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:56,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:56,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:56,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:56,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:56,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:56,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:37:56,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:56,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:56,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:37:56,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:56,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:37:56,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:37:56,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870350699] [2020-10-29 13:37:56,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:37:56,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 13:37:56,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512399857] [2020-10-29 13:37:56,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:37:56,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:56,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:37:56,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:37:56,117 INFO L87 Difference]: Start difference. First operand 56993 states and 78040 transitions. Second operand 9 states. [2020-10-29 13:37:56,297 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:37:57,825 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:37:58,193 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:38:13,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:13,335 INFO L93 Difference]: Finished difference Result 130273 states and 177080 transitions. [2020-10-29 13:38:13,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:38:13,336 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-29 13:38:13,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:13,480 INFO L225 Difference]: With dead ends: 130273 [2020-10-29 13:38:13,480 INFO L226 Difference]: Without dead ends: 106086 [2020-10-29 13:38:13,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2020-10-29 13:38:13,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106086 states. [2020-10-29 13:38:23,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106086 to 59680. [2020-10-29 13:38:23,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59680 states. [2020-10-29 13:38:23,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59680 states to 59680 states and 81341 transitions. [2020-10-29 13:38:23,802 INFO L78 Accepts]: Start accepts. Automaton has 59680 states and 81341 transitions. Word has length 72 [2020-10-29 13:38:23,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:23,802 INFO L481 AbstractCegarLoop]: Abstraction has 59680 states and 81341 transitions. [2020-10-29 13:38:23,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:38:23,802 INFO L276 IsEmpty]: Start isEmpty. Operand 59680 states and 81341 transitions. [2020-10-29 13:38:23,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:38:23,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:23,807 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, 1, 1, 1, 1, 1, 1] [2020-10-29 13:38:23,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 13:38:23,807 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:23,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:23,808 INFO L82 PathProgramCache]: Analyzing trace with hash 42333619, now seen corresponding path program 1 times [2020-10-29 13:38:23,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:23,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452994477] [2020-10-29 13:38:23,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:23,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:23,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:23,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:24,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:24,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:27,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:27,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:38:27,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:38:27,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3888 [2020-10-29 13:38:27,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:27,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:27,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:38:27,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:38:27,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 13:38:27,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:28,093 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:38:28,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:38:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:28,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:28,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:28,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:38:28,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:28,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:38:28,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:28,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:28,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:38:28,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:38:28,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:38:28,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:28,121 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:38:28,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452994477] [2020-10-29 13:38:28,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:38:28,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 13:38:28,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331335463] [2020-10-29 13:38:28,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:38:28,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:38:28,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:38:28,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:38:28,123 INFO L87 Difference]: Start difference. First operand 59680 states and 81341 transitions. Second operand 10 states. [2020-10-29 13:38:28,310 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:38:31,619 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:38:36,685 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:38:41,921 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 138