/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:22:52,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:22:52,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:22:52,997 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:22:52,997 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:22:53,004 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:22:53,007 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:22:53,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:22:53,015 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:22:53,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:22:53,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:22:53,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:22:53,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:22:53,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:22:53,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:22:53,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:22:53,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:22:53,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:22:53,045 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:22:53,056 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:22:53,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:22:53,060 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:22:53,062 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:22:53,065 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:22:53,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:22:53,085 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:22:53,085 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:22:53,090 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:22:53,090 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:22:53,092 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:22:53,093 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:22:53,094 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:22:53,096 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:22:53,097 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:22:53,098 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:22:53,098 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:22:53,099 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:22:53,099 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:22:53,100 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:22:53,101 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:22:53,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:22:53,110 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 [2020-10-28 19:22:53,163 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:22:53,164 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:22:53,170 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:22:53,170 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:22:53,170 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:22:53,171 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:22:53,171 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:22:53,171 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:22:53,171 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:22:53,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:22:53,173 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:22:53,173 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:22:53,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:22:53,174 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:22:53,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:22:53,174 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:22:53,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:22:53,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:22:53,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:22:53,175 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:22:53,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:22:53,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:22:53,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:22:53,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:22:53,176 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:22:53,176 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:22:53,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:22:53,177 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:22:53,177 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:22:53,177 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:22:53,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:22:53,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:22:53,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:22:53,671 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:22:53,672 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:22:53,673 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 19:22:53,754 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/28c3759ff/83271c77b3324080a9ffaa9461f8215e/FLAG43bbd0c34 [2020-10-28 19:22:54,634 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:22:54,635 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 19:22:54,661 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/28c3759ff/83271c77b3324080a9ffaa9461f8215e/FLAG43bbd0c34 [2020-10-28 19:22:54,747 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/28c3759ff/83271c77b3324080a9ffaa9461f8215e [2020-10-28 19:22:54,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:22:54,758 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:22:54,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:22:54,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:22:54,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:22:54,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:22:54" (1/1) ... [2020-10-28 19:22:54,770 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25ccef6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:22:54, skipping insertion in model container [2020-10-28 19:22:54,770 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:22:54" (1/1) ... [2020-10-28 19:22:54,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:22:54,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:22:56,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:22:56,073 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:22:56,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:22:56,570 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:22:56,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:22:56 WrapperNode [2020-10-28 19:22:56,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:22:56,575 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:22:56,575 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:22:56,576 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:22:56,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:22:56" (1/1) ... [2020-10-28 19:22:56,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:22:56" (1/1) ... [2020-10-28 19:22:56,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:22:56" (1/1) ... [2020-10-28 19:22:56,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:22:56" (1/1) ... [2020-10-28 19:22:56,715 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:22:56" (1/1) ... [2020-10-28 19:22:56,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:22:56" (1/1) ... [2020-10-28 19:22:56,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:22:56" (1/1) ... [2020-10-28 19:22:56,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:22:56,793 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:22:56,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:22:56,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:22:56,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:22:56" (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 [2020-10-28 19:22:56,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:22:56,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:22:56,881 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:22:56,881 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:22:56,881 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:22:56,882 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:22:56,882 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:22:56,882 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:22:56,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:22:56,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:22:56,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 19:22:56,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:22:56,883 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:22:56,883 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:22:56,883 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:22:56,883 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:22:56,883 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:22:56,884 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:22:56,884 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:22:56,884 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 19:22:56,884 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:22:56,884 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:22:56,884 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:22:56,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:22:56,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:22:56,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:22:56,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:22:56,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:22:56,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:22:59,855 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:22:59,855 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:22:59,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:22:59 BoogieIcfgContainer [2020-10-28 19:22:59,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:22:59,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:22:59,861 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:22:59,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:22:59,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:22:54" (1/3) ... [2020-10-28 19:22:59,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f3dc17f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:22:59, skipping insertion in model container [2020-10-28 19:22:59,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:22:56" (2/3) ... [2020-10-28 19:22:59,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f3dc17f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:22:59, skipping insertion in model container [2020-10-28 19:22:59,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:22:59" (3/3) ... [2020-10-28 19:22:59,868 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 19:22:59,881 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:22:59,887 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:22:59,902 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:22:59,936 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:22:59,936 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:22:59,936 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:22:59,937 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:22:59,937 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:22:59,937 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:22:59,937 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:22:59,937 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:22:59,980 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states. [2020-10-28 19:23:00,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-28 19:23:00,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:23:00,014 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:23:00,014 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:23:00,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:23:00,021 INFO L82 PathProgramCache]: Analyzing trace with hash 253401268, now seen corresponding path program 1 times [2020-10-28 19:23:00,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:23:00,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186956474] [2020-10-28 19:23:00,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:23:00,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:23:00,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:01,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:01,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:02,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:02,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:03,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:03,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:03,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:03,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:04,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:04,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:04,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:05,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:05,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:05,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:23:05,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 335 [2020-10-28 19:23:05,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 19:23:05,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-28 19:23:05,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:23:05,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:23:05,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:23:05,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-28 19:23:05,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 213 [2020-10-28 19:23:05,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 19:23:06,574 WARN L193 SmtUtils]: Spent 537.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:23:06,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:23:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:23:06,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:06,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:23:06,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:23:06,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:23:06,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 19:23:06,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:23:06,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:23:06,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:23:06,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:23:06,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:23:06,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:23:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:23:06,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186956474] [2020-10-28 19:23:06,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:23:06,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:23:06,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228261086] [2020-10-28 19:23:06,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:23:06,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:23:06,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:23:06,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:23:06,919 INFO L87 Difference]: Start difference. First operand 793 states. Second operand 4 states. [2020-10-28 19:23:07,862 WARN L193 SmtUtils]: Spent 749.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2020-10-28 19:23:13,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:23:13,830 INFO L93 Difference]: Finished difference Result 1495 states and 2629 transitions. [2020-10-28 19:23:13,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:23:13,834 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-10-28 19:23:13,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:23:13,867 INFO L225 Difference]: With dead ends: 1495 [2020-10-28 19:23:13,868 INFO L226 Difference]: Without dead ends: 1275 [2020-10-28 19:23:13,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:23:13,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2020-10-28 19:23:14,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1272. [2020-10-28 19:23:14,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1272 states. [2020-10-28 19:23:14,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1979 transitions. [2020-10-28 19:23:14,035 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1979 transitions. Word has length 327 [2020-10-28 19:23:14,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:23:14,036 INFO L481 AbstractCegarLoop]: Abstraction has 1272 states and 1979 transitions. [2020-10-28 19:23:14,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:23:14,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1979 transitions. [2020-10-28 19:23:14,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-28 19:23:14,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:23:14,047 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:23:14,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:23:14,048 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:23:14,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:23:14,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1052447530, now seen corresponding path program 1 times [2020-10-28 19:23:14,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:23:14,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98813214] [2020-10-28 19:23:14,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:23:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:23:14,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:14,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:14,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:15,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:15,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:15,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:16,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:16,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:16,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:16,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:16,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:16,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:17,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:17,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:17,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:17,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:19,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:23:19,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 335 [2020-10-28 19:23:19,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 19:23:19,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-28 19:23:19,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:23:19,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:23:19,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:23:19,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-28 19:23:19,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 237 [2020-10-28 19:23:19,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:23:20,219 WARN L193 SmtUtils]: Spent 763.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:23:20,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:23:20,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:23:20,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:20,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:23:20,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:23:20,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:23:20,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 19:23:20,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:23:20,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:23:20,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:23:20,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:23:20,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:23:20,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:23:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:23:20,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98813214] [2020-10-28 19:23:20,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:23:20,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:23:20,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683308278] [2020-10-28 19:23:20,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:23:20,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:23:20,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:23:20,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:23:20,528 INFO L87 Difference]: Start difference. First operand 1272 states and 1979 transitions. Second operand 4 states. [2020-10-28 19:23:21,494 WARN L193 SmtUtils]: Spent 905.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2020-10-28 19:23:26,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:23:26,938 INFO L93 Difference]: Finished difference Result 2522 states and 3952 transitions. [2020-10-28 19:23:26,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:23:26,939 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-10-28 19:23:26,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:23:26,955 INFO L225 Difference]: With dead ends: 2522 [2020-10-28 19:23:26,956 INFO L226 Difference]: Without dead ends: 2187 [2020-10-28 19:23:26,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:23:26,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2020-10-28 19:23:27,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2184. [2020-10-28 19:23:27,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2184 states. [2020-10-28 19:23:27,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 3389 transitions. [2020-10-28 19:23:27,085 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 3389 transitions. Word has length 327 [2020-10-28 19:23:27,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:23:27,086 INFO L481 AbstractCegarLoop]: Abstraction has 2184 states and 3389 transitions. [2020-10-28 19:23:27,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:23:27,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 3389 transitions. [2020-10-28 19:23:27,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-28 19:23:27,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:23:27,098 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:23:27,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:23:27,098 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:23:27,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:23:27,099 INFO L82 PathProgramCache]: Analyzing trace with hash 2112533621, now seen corresponding path program 1 times [2020-10-28 19:23:27,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:23:27,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375920749] [2020-10-28 19:23:27,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:23:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:23:27,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:27,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:28,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:28,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:28,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:28,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:28,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:28,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:29,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:29,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:29,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:29,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:29,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:30,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:30,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:30,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:32,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:23:32,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 335 [2020-10-28 19:23:32,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 19:23:32,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5077 [2020-10-28 19:23:32,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:23:32,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:23:32,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:23:32,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:23:32,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 218 [2020-10-28 19:23:32,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:23:33,509 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:23:33,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:23:33,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:23:33,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:33,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:23:33,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:23:33,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:23:33,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 19:23:33,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:23:33,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:23:33,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:23:33,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:23:33,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:23:33,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:23:33,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:23:33,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375920749] [2020-10-28 19:23:33,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:23:33,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:23:33,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136533432] [2020-10-28 19:23:33,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:23:33,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:23:33,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:23:33,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:23:33,984 INFO L87 Difference]: Start difference. First operand 2184 states and 3389 transitions. Second operand 5 states. [2020-10-28 19:23:41,485 WARN L193 SmtUtils]: Spent 766.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:23:43,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:23:43,859 INFO L93 Difference]: Finished difference Result 6429 states and 9958 transitions. [2020-10-28 19:23:43,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:23:43,860 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 327 [2020-10-28 19:23:43,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:23:43,884 INFO L225 Difference]: With dead ends: 6429 [2020-10-28 19:23:43,884 INFO L226 Difference]: Without dead ends: 4296 [2020-10-28 19:23:43,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:23:43,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4296 states. [2020-10-28 19:23:44,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4296 to 4293. [2020-10-28 19:23:44,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4293 states. [2020-10-28 19:23:44,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4293 states to 4293 states and 6629 transitions. [2020-10-28 19:23:44,134 INFO L78 Accepts]: Start accepts. Automaton has 4293 states and 6629 transitions. Word has length 327 [2020-10-28 19:23:44,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:23:44,134 INFO L481 AbstractCegarLoop]: Abstraction has 4293 states and 6629 transitions. [2020-10-28 19:23:44,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:23:44,134 INFO L276 IsEmpty]: Start isEmpty. Operand 4293 states and 6629 transitions. [2020-10-28 19:23:44,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-10-28 19:23:44,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:23:44,150 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:23:44,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:23:44,151 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:23:44,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:23:44,151 INFO L82 PathProgramCache]: Analyzing trace with hash 347310113, now seen corresponding path program 1 times [2020-10-28 19:23:44,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:23:44,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730140861] [2020-10-28 19:23:44,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:23:44,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:23:44,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:44,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:44,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:44,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:44,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:45,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:45,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:45,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:45,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:45,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:45,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:46,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:46,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:48,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:48,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:49,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:23:49,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 337 [2020-10-28 19:23:49,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:23:49,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-28 19:23:49,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:23:49,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:23:49,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:23:49,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:23:49,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-10-28 19:23:49,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:23:50,137 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:23:50,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:23:50,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:23:50,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:50,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:23:50,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:23:50,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:23:50,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 19:23:50,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:23:50,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:23:50,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:23:50,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:23:50,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:23:50,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:23:50,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:23:50,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730140861] [2020-10-28 19:23:50,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:23:50,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:23:50,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107654489] [2020-10-28 19:23:50,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:23:50,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:23:50,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:23:50,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:23:50,373 INFO L87 Difference]: Start difference. First operand 4293 states and 6629 transitions. Second operand 5 states. [2020-10-28 19:23:57,799 WARN L193 SmtUtils]: Spent 724.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:24:00,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:24:00,131 INFO L93 Difference]: Finished difference Result 12672 states and 19532 transitions. [2020-10-28 19:24:00,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:24:00,132 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 329 [2020-10-28 19:24:00,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:24:00,173 INFO L225 Difference]: With dead ends: 12672 [2020-10-28 19:24:00,173 INFO L226 Difference]: Without dead ends: 8444 [2020-10-28 19:24:00,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:24:00,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8444 states. [2020-10-28 19:24:00,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8444 to 8441. [2020-10-28 19:24:00,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8441 states. [2020-10-28 19:24:00,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8441 states to 8441 states and 12961 transitions. [2020-10-28 19:24:00,745 INFO L78 Accepts]: Start accepts. Automaton has 8441 states and 12961 transitions. Word has length 329 [2020-10-28 19:24:00,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:24:00,746 INFO L481 AbstractCegarLoop]: Abstraction has 8441 states and 12961 transitions. [2020-10-28 19:24:00,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:24:00,746 INFO L276 IsEmpty]: Start isEmpty. Operand 8441 states and 12961 transitions. [2020-10-28 19:24:00,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-28 19:24:00,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:24:00,769 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:24:00,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:24:00,769 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:24:00,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:24:00,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1186330771, now seen corresponding path program 1 times [2020-10-28 19:24:00,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:24:00,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570926649] [2020-10-28 19:24:00,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:24:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:00,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:01,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:01,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:01,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:01,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:01,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:01,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:01,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:02,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:02,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:02,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:02,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:03,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:03,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:05,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:05,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:05,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:05,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-10-28 19:24:05,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 19:24:05,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 19:24:05,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:05,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:05,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:24:05,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:24:05,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 186 [2020-10-28 19:24:05,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:24:06,755 WARN L193 SmtUtils]: Spent 750.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:24:06,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:24:06,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:06,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:06,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:06,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:24:06,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:24:06,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 19:24:06,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:06,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:06,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:24:06,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:24:06,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:24:06,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:24:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:24:06,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570926649] [2020-10-28 19:24:06,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:24:06,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:24:06,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956678986] [2020-10-28 19:24:06,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:24:06,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:24:06,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:24:06,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:24:06,970 INFO L87 Difference]: Start difference. First operand 8441 states and 12961 transitions. Second operand 5 states. [2020-10-28 19:24:14,274 WARN L193 SmtUtils]: Spent 754.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:24:16,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:24:16,839 INFO L93 Difference]: Finished difference Result 24689 states and 37789 transitions. [2020-10-28 19:24:16,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:24:16,840 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 331 [2020-10-28 19:24:16,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:24:16,903 INFO L225 Difference]: With dead ends: 24689 [2020-10-28 19:24:16,903 INFO L226 Difference]: Without dead ends: 16514 [2020-10-28 19:24:16,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:24:16,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16514 states. [2020-10-28 19:24:18,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16514 to 16511. [2020-10-28 19:24:18,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16511 states. [2020-10-28 19:24:18,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16511 states to 16511 states and 25181 transitions. [2020-10-28 19:24:18,033 INFO L78 Accepts]: Start accepts. Automaton has 16511 states and 25181 transitions. Word has length 331 [2020-10-28 19:24:18,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:24:18,033 INFO L481 AbstractCegarLoop]: Abstraction has 16511 states and 25181 transitions. [2020-10-28 19:24:18,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:24:18,033 INFO L276 IsEmpty]: Start isEmpty. Operand 16511 states and 25181 transitions. [2020-10-28 19:24:18,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-28 19:24:18,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:24:18,066 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:24:18,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:24:18,067 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:24:18,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:24:18,068 INFO L82 PathProgramCache]: Analyzing trace with hash -386223541, now seen corresponding path program 1 times [2020-10-28 19:24:18,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:24:18,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835216373] [2020-10-28 19:24:18,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:24:18,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:18,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:18,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:18,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:18,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:18,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:18,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:18,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:19,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:19,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:19,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:19,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:19,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:19,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:23,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:23,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 341 [2020-10-28 19:24:23,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:24:23,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 19:24:23,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:23,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:23,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:24:23,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:24:23,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-28 19:24:23,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:24:24,060 WARN L193 SmtUtils]: Spent 753.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:24:24,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:24:24,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:24,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:24,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:24,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:24:24,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:24:24,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 19:24:24,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:24,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:24,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:24:24,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:24:24,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:24:24,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:24:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:24:24,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835216373] [2020-10-28 19:24:24,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:24:24,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:24:24,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692825106] [2020-10-28 19:24:24,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:24:24,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:24:24,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:24:24,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:24:24,263 INFO L87 Difference]: Start difference. First operand 16511 states and 25181 transitions. Second operand 5 states. [2020-10-28 19:24:32,277 WARN L193 SmtUtils]: Spent 736.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:24:35,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:24:35,318 INFO L93 Difference]: Finished difference Result 48427 states and 73641 transitions. [2020-10-28 19:24:35,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:24:35,320 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 333 [2020-10-28 19:24:35,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:24:35,392 INFO L225 Difference]: With dead ends: 48427 [2020-10-28 19:24:35,392 INFO L226 Difference]: Without dead ends: 32348 [2020-10-28 19:24:35,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:24:35,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32348 states. [2020-10-28 19:24:37,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32348 to 32345. [2020-10-28 19:24:37,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32345 states. [2020-10-28 19:24:37,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32345 states to 32345 states and 48989 transitions. [2020-10-28 19:24:37,601 INFO L78 Accepts]: Start accepts. Automaton has 32345 states and 48989 transitions. Word has length 333 [2020-10-28 19:24:37,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:24:37,602 INFO L481 AbstractCegarLoop]: Abstraction has 32345 states and 48989 transitions. [2020-10-28 19:24:37,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:24:37,602 INFO L276 IsEmpty]: Start isEmpty. Operand 32345 states and 48989 transitions. [2020-10-28 19:24:37,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-10-28 19:24:37,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:24:37,655 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:24:37,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:24:37,655 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:24:37,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:24:37,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1144296940, now seen corresponding path program 1 times [2020-10-28 19:24:37,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:24:37,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523332813] [2020-10-28 19:24:37,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:24:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:37,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:37,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:37,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:37,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:37,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:38,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:38,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:38,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:38,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:38,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:38,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:40,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:40,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:42,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:42,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 343 [2020-10-28 19:24:42,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:24:42,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-28 19:24:42,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:42,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:42,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:24:42,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:24:42,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 166 [2020-10-28 19:24:42,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:24:43,601 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:24:43,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:24:43,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:43,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:43,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:43,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:24:43,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:24:43,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 19:24:43,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:43,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:43,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:24:43,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:24:43,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:24:43,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:24:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:24:43,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523332813] [2020-10-28 19:24:43,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:24:43,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:24:43,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290354513] [2020-10-28 19:24:43,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:24:43,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:24:43,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:24:43,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:24:43,795 INFO L87 Difference]: Start difference. First operand 32345 states and 48989 transitions. Second operand 5 states. [2020-10-28 19:24:52,418 WARN L193 SmtUtils]: Spent 743.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:24:55,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:24:55,876 INFO L93 Difference]: Finished difference Result 95148 states and 143720 transitions. [2020-10-28 19:24:55,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:24:55,877 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 335 [2020-10-28 19:24:55,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:24:55,998 INFO L225 Difference]: With dead ends: 95148 [2020-10-28 19:24:55,998 INFO L226 Difference]: Without dead ends: 63205 [2020-10-28 19:24:56,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:24:56,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63205 states. [2020-10-28 19:25:00,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63205 to 63202. [2020-10-28 19:25:00,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63202 states. [2020-10-28 19:25:01,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63202 states to 63202 states and 94900 transitions. [2020-10-28 19:25:01,016 INFO L78 Accepts]: Start accepts. Automaton has 63202 states and 94900 transitions. Word has length 335 [2020-10-28 19:25:01,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:25:01,017 INFO L481 AbstractCegarLoop]: Abstraction has 63202 states and 94900 transitions. [2020-10-28 19:25:01,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:25:01,017 INFO L276 IsEmpty]: Start isEmpty. Operand 63202 states and 94900 transitions. [2020-10-28 19:25:01,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-28 19:25:01,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:25:01,107 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:25:01,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:25:01,108 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:25:01,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:25:01,108 INFO L82 PathProgramCache]: Analyzing trace with hash -494343440, now seen corresponding path program 1 times [2020-10-28 19:25:01,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:25:01,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269107455] [2020-10-28 19:25:01,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:25:01,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:01,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:01,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:01,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:01,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:01,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:01,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:01,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:01,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:01,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:01,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:05,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:05,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:06,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:06,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:06,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:06,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 345 [2020-10-28 19:25:06,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 19:25:06,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 19:25:06,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:06,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:06,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:25:06,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:25:06,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-28 19:25:06,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:25:07,029 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:25:07,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:25:07,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:07,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:07,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:07,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:25:07,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:25:07,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 19:25:07,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:07,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:07,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:25:07,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:25:07,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:25:07,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:25:07,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:25:07,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269107455] [2020-10-28 19:25:07,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:25:07,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:25:07,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466378880] [2020-10-28 19:25:07,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:25:07,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:25:07,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:25:07,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:25:07,233 INFO L87 Difference]: Start difference. First operand 63202 states and 94900 transitions. Second operand 5 states. [2020-10-28 19:25:19,414 WARN L193 SmtUtils]: Spent 963.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:25:24,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:25:24,231 INFO L93 Difference]: Finished difference Result 185778 states and 278148 transitions. [2020-10-28 19:25:24,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:25:24,232 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 337 [2020-10-28 19:25:24,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:25:24,438 INFO L225 Difference]: With dead ends: 185778 [2020-10-28 19:25:24,438 INFO L226 Difference]: Without dead ends: 123427 [2020-10-28 19:25:24,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:25:24,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123427 states. [2020-10-28 19:25:33,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123427 to 123424. [2020-10-28 19:25:33,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123424 states. [2020-10-28 19:25:33,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123424 states to 123424 states and 183716 transitions. [2020-10-28 19:25:33,577 INFO L78 Accepts]: Start accepts. Automaton has 123424 states and 183716 transitions. Word has length 337 [2020-10-28 19:25:33,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:25:33,577 INFO L481 AbstractCegarLoop]: Abstraction has 123424 states and 183716 transitions. [2020-10-28 19:25:33,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:25:33,577 INFO L276 IsEmpty]: Start isEmpty. Operand 123424 states and 183716 transitions. [2020-10-28 19:25:33,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-10-28 19:25:33,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:25:33,945 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:25:33,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:25:33,945 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:25:33,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:25:33,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1592637506, now seen corresponding path program 1 times [2020-10-28 19:25:33,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:25:33,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786581682] [2020-10-28 19:25:33,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:25:33,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:34,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:34,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:34,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:34,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:34,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:34,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:34,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:34,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:34,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:34,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:34,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:34,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:34,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:39,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:39,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 347 [2020-10-28 19:25:39,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:25:39,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 19:25:39,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:39,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:39,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:25:39,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:25:39,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-28 19:25:39,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:25:39,833 WARN L193 SmtUtils]: Spent 720.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:25:39,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:25:39,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:39,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:39,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:39,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:25:39,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:25:39,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 19:25:39,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:39,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:39,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:25:39,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:25:39,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:25:39,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:25:39,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:25:39,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786581682] [2020-10-28 19:25:39,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:25:39,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:25:39,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801996910] [2020-10-28 19:25:40,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:25:40,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:25:40,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:25:40,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:25:40,001 INFO L87 Difference]: Start difference. First operand 123424 states and 183716 transitions. Second operand 5 states. [2020-10-28 19:25:57,736 WARN L193 SmtUtils]: Spent 766.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:26:05,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:26:05,852 INFO L93 Difference]: Finished difference Result 363977 states and 540475 transitions. [2020-10-28 19:26:05,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:26:05,853 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 339 [2020-10-28 19:26:05,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:26:06,468 INFO L225 Difference]: With dead ends: 363977 [2020-10-28 19:26:06,468 INFO L226 Difference]: Without dead ends: 241184 [2020-10-28 19:26:06,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:26:06,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241184 states. [2020-10-28 19:26:26,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241184 to 241181. [2020-10-28 19:26:26,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241181 states. [2020-10-28 19:26:26,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241181 states to 241181 states and 355896 transitions. [2020-10-28 19:26:26,983 INFO L78 Accepts]: Start accepts. Automaton has 241181 states and 355896 transitions. Word has length 339 [2020-10-28 19:26:26,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:26:26,984 INFO L481 AbstractCegarLoop]: Abstraction has 241181 states and 355896 transitions. [2020-10-28 19:26:26,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:26:26,984 INFO L276 IsEmpty]: Start isEmpty. Operand 241181 states and 355896 transitions. [2020-10-28 19:26:27,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-10-28 19:26:27,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:26:27,618 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:26:27,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 19:26:27,618 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:26:27,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:26:27,619 INFO L82 PathProgramCache]: Analyzing trace with hash 13983063, now seen corresponding path program 1 times [2020-10-28 19:26:27,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:26:27,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501200972] [2020-10-28 19:26:27,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:26:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:26:27,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:27,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:27,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:27,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:27,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:27,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:27,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:28,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:28,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:28,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:28,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:28,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking...