/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=SHALLOWEST --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/systemc/mem_slave_tlm.4.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 06:31:23,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 06:31:23,634 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 06:31:23,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 06:31:23,674 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 06:31:23,676 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 06:31:23,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 06:31:23,680 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 06:31:23,682 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 06:31:23,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 06:31:23,684 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 06:31:23,686 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 06:31:23,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 06:31:23,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 06:31:23,689 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 06:31:23,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 06:31:23,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 06:31:23,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 06:31:23,694 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 06:31:23,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 06:31:23,699 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 06:31:23,700 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 06:31:23,702 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 06:31:23,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 06:31:23,727 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 06:31:23,727 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 06:31:23,727 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 06:31:23,728 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 06:31:23,729 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 06:31:23,730 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 06:31:23,731 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 06:31:23,732 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 06:31:23,732 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 06:31:23,733 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 06:31:23,735 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 06:31:23,735 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 06:31:23,736 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 06:31:23,736 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 06:31:23,736 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 06:31:23,737 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 06:31:23,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 06:31:23,739 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 06:31:23,765 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 06:31:23,765 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 06:31:23,767 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 06:31:23,767 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 06:31:23,767 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 06:31:23,767 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 06:31:23,768 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 06:31:23,768 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 06:31:23,768 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 06:31:23,768 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 06:31:23,768 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 06:31:23,769 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 06:31:23,769 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 06:31:23,769 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 06:31:23,769 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 06:31:23,769 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 06:31:23,769 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 06:31:23,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 06:31:23,770 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 06:31:23,770 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 06:31:23,770 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 06:31:23,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 06:31:23,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 06:31:23,771 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 06:31:23,771 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 06:31:23,771 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 06:31:23,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 06:31:23,772 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 06:31:23,772 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 06:31:23,772 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 06:31:24,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 06:31:24,154 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 06:31:24,157 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 06:31:24,159 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 06:31:24,159 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 06:31:24,160 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/mem_slave_tlm.4.cil.c [2020-10-27 06:31:24,225 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b6c7b997/a9f3279a3f3f479c815e73e8d339a52b/FLAG625b15121 [2020-10-27 06:31:24,844 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 06:31:24,844 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/mem_slave_tlm.4.cil.c [2020-10-27 06:31:24,863 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b6c7b997/a9f3279a3f3f479c815e73e8d339a52b/FLAG625b15121 [2020-10-27 06:31:25,117 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b6c7b997/a9f3279a3f3f479c815e73e8d339a52b [2020-10-27 06:31:25,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 06:31:25,130 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 06:31:25,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 06:31:25,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 06:31:25,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 06:31:25,139 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:31:25" (1/1) ... [2020-10-27 06:31:25,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@621b8120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:25, skipping insertion in model container [2020-10-27 06:31:25,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:31:25" (1/1) ... [2020-10-27 06:31:25,161 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 06:31:25,211 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 06:31:25,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 06:31:25,520 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 06:31:25,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 06:31:25,681 INFO L208 MainTranslator]: Completed translation [2020-10-27 06:31:25,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:25 WrapperNode [2020-10-27 06:31:25,685 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 06:31:25,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 06:31:25,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 06:31:25,686 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 06:31:25,703 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:25" (1/1) ... [2020-10-27 06:31:25,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:25" (1/1) ... [2020-10-27 06:31:25,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:25" (1/1) ... [2020-10-27 06:31:25,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:25" (1/1) ... [2020-10-27 06:31:25,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:25" (1/1) ... [2020-10-27 06:31:25,767 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:25" (1/1) ... [2020-10-27 06:31:25,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:25" (1/1) ... [2020-10-27 06:31:25,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 06:31:25,784 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 06:31:25,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 06:31:25,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 06:31:25,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:25" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 06:31:25,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 06:31:25,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 06:31:25,940 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 06:31:25,940 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-10-27 06:31:25,940 INFO L138 BoogieDeclarations]: Found implementation of procedure s_memory_read [2020-10-27 06:31:25,940 INFO L138 BoogieDeclarations]: Found implementation of procedure s_memory_write [2020-10-27 06:31:25,941 INFO L138 BoogieDeclarations]: Found implementation of procedure m_run [2020-10-27 06:31:25,941 INFO L138 BoogieDeclarations]: Found implementation of procedure s_run [2020-10-27 06:31:25,941 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-10-27 06:31:25,941 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-10-27 06:31:25,941 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 06:31:25,941 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 06:31:25,942 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 06:31:25,942 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 06:31:25,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 06:31:25,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 06:31:25,942 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-10-27 06:31:25,942 INFO L130 BoogieDeclarations]: Found specification of procedure s_memory_read [2020-10-27 06:31:25,943 INFO L130 BoogieDeclarations]: Found specification of procedure s_memory_write [2020-10-27 06:31:25,943 INFO L130 BoogieDeclarations]: Found specification of procedure m_run [2020-10-27 06:31:25,943 INFO L130 BoogieDeclarations]: Found specification of procedure s_run [2020-10-27 06:31:25,943 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-10-27 06:31:25,943 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-10-27 06:31:25,943 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 06:31:25,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 06:31:25,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 06:31:25,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 06:31:25,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 06:31:25,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 06:31:25,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 06:31:27,162 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 06:31:27,163 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-27 06:31:27,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:31:27 BoogieIcfgContainer [2020-10-27 06:31:27,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 06:31:27,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 06:31:27,168 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 06:31:27,171 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 06:31:27,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:31:25" (1/3) ... [2020-10-27 06:31:27,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e0bdd05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:31:27, skipping insertion in model container [2020-10-27 06:31:27,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:25" (2/3) ... [2020-10-27 06:31:27,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e0bdd05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:31:27, skipping insertion in model container [2020-10-27 06:31:27,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:31:27" (3/3) ... [2020-10-27 06:31:27,174 INFO L111 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.4.cil.c [2020-10-27 06:31:27,187 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 06:31:27,193 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 06:31:27,207 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 06:31:27,255 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 06:31:27,255 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 06:31:27,255 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 06:31:27,255 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 06:31:27,255 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 06:31:27,256 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 06:31:27,256 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 06:31:27,256 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 06:31:27,295 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states. [2020-10-27 06:31:27,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 06:31:27,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:31:27,309 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] [2020-10-27 06:31:27,310 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:31:27,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:31:27,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1951364599, now seen corresponding path program 1 times [2020-10-27 06:31:27,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:31:27,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498692054] [2020-10-27 06:31:27,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:31:27,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:31:27,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:27,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:27,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:28,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:28,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:28,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:28,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:29,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:29,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:29,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:30,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:30,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:30,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:30,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:32,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:31:32,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 06:31:32,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 06:31:32,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 06:31:32,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:31:32,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:31:32,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:31:32,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 06:31:32,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 06:31:32,892 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 06:31:32,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:31:32,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:31:32,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:32,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:31:32,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:31:32,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:31:32,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 06:31:32,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:31:32,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:31:32,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:31:32,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:31:32,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:31:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:31:32,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498692054] [2020-10-27 06:31:32,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:31:32,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 06:31:32,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517020605] [2020-10-27 06:31:32,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 06:31:32,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:31:32,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 06:31:32,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 06:31:32,963 INFO L87 Difference]: Start difference. First operand 308 states. Second operand 4 states. [2020-10-27 06:31:33,214 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 06:31:34,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:31:34,861 INFO L93 Difference]: Finished difference Result 640 states and 1137 transitions. [2020-10-27 06:31:34,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 06:31:34,865 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-10-27 06:31:34,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:31:34,882 INFO L225 Difference]: With dead ends: 640 [2020-10-27 06:31:34,882 INFO L226 Difference]: Without dead ends: 347 [2020-10-27 06:31:34,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:31:34,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-27 06:31:34,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 296. [2020-10-27 06:31:34,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-27 06:31:34,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 481 transitions. [2020-10-27 06:31:34,990 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 481 transitions. Word has length 40 [2020-10-27 06:31:34,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:31:34,991 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 481 transitions. [2020-10-27 06:31:34,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 06:31:34,991 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 481 transitions. [2020-10-27 06:31:34,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 06:31:34,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:31:34,995 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:31:34,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 06:31:34,995 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:31:34,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:31:34,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1244373066, now seen corresponding path program 1 times [2020-10-27 06:31:34,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:31:34,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329267899] [2020-10-27 06:31:34,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:31:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:31:35,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:35,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:35,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:35,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:35,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:35,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:36,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:36,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:36,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:36,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:36,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:36,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:36,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:37,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:40,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:31:40,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 06:31:40,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 06:31:40,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 06:31:40,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:31:40,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:31:40,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:31:40,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 06:31:40,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:31:40,404 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 06:31:40,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:31:40,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:31:40,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:40,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:31:40,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:31:40,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:31:40,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 06:31:40,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:31:40,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:31:40,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:31:40,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:31:40,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:31:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:31:40,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329267899] [2020-10-27 06:31:40,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:31:40,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 06:31:40,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663514446] [2020-10-27 06:31:40,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 06:31:40,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:31:40,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 06:31:40,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 06:31:40,441 INFO L87 Difference]: Start difference. First operand 296 states and 481 transitions. Second operand 4 states. [2020-10-27 06:31:40,693 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 06:31:42,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:31:42,253 INFO L93 Difference]: Finished difference Result 634 states and 1022 transitions. [2020-10-27 06:31:42,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 06:31:42,253 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-27 06:31:42,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:31:42,258 INFO L225 Difference]: With dead ends: 634 [2020-10-27 06:31:42,258 INFO L226 Difference]: Without dead ends: 360 [2020-10-27 06:31:42,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:31:42,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-10-27 06:31:42,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 302. [2020-10-27 06:31:42,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-10-27 06:31:42,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 473 transitions. [2020-10-27 06:31:42,363 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 473 transitions. Word has length 43 [2020-10-27 06:31:42,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:31:42,364 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 473 transitions. [2020-10-27 06:31:42,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 06:31:42,364 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 473 transitions. [2020-10-27 06:31:42,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 06:31:42,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:31:42,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:31:42,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 06:31:42,375 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:31:42,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:31:42,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1331726164, now seen corresponding path program 1 times [2020-10-27 06:31:42,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:31:42,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426905324] [2020-10-27 06:31:42,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:31:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:31:42,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:42,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:42,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:42,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:42,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:42,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:42,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:43,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:43,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:43,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:45,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:31:45,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 06:31:45,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 06:31:45,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3460 [2020-10-27 06:31:45,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:31:45,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:31:45,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:31:45,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 06:31:45,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:31:46,152 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 06:31:46,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:31:46,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:31:46,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:46,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:31:46,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:31:46,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:31:46,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 06:31:46,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:31:46,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:31:46,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:31:46,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:31:46,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 06:31:46,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:31:46,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426905324] [2020-10-27 06:31:46,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:31:46,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 06:31:46,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844606560] [2020-10-27 06:31:46,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 06:31:46,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:31:46,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 06:31:46,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 06:31:46,193 INFO L87 Difference]: Start difference. First operand 302 states and 473 transitions. Second operand 4 states. [2020-10-27 06:31:46,429 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 06:31:47,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:31:47,797 INFO L93 Difference]: Finished difference Result 629 states and 976 transitions. [2020-10-27 06:31:47,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 06:31:47,798 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-27 06:31:47,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:31:47,801 INFO L225 Difference]: With dead ends: 629 [2020-10-27 06:31:47,801 INFO L226 Difference]: Without dead ends: 353 [2020-10-27 06:31:47,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:31:47,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-10-27 06:31:47,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 302. [2020-10-27 06:31:47,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-10-27 06:31:47,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 465 transitions. [2020-10-27 06:31:47,842 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 465 transitions. Word has length 45 [2020-10-27 06:31:47,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:31:47,843 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 465 transitions. [2020-10-27 06:31:47,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 06:31:47,843 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 465 transitions. [2020-10-27 06:31:47,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 06:31:47,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:31:47,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:31:47,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 06:31:47,845 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:31:47,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:31:47,845 INFO L82 PathProgramCache]: Analyzing trace with hash 35532523, now seen corresponding path program 1 times [2020-10-27 06:31:47,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:31:47,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280632105] [2020-10-27 06:31:47,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:31:47,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:31:47,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:47,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:47,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:48,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:48,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:48,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:48,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:50,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:31:50,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 06:31:50,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 06:31:50,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2736 [2020-10-27 06:31:50,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:31:50,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:31:50,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:31:50,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 06:31:50,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:31:50,859 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 06:31:50,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:31:50,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:31:50,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:50,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:31:50,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:31:50,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:31:50,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 06:31:50,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:31:50,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:31:50,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:31:50,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:31:50,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:31:50,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:31:50,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280632105] [2020-10-27 06:31:50,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:31:50,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 06:31:50,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876061037] [2020-10-27 06:31:50,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 06:31:50,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:31:50,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 06:31:50,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 06:31:50,892 INFO L87 Difference]: Start difference. First operand 302 states and 465 transitions. Second operand 4 states. [2020-10-27 06:31:51,138 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 06:31:52,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:31:52,451 INFO L93 Difference]: Finished difference Result 633 states and 968 transitions. [2020-10-27 06:31:52,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 06:31:52,452 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-27 06:31:52,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:31:52,455 INFO L225 Difference]: With dead ends: 633 [2020-10-27 06:31:52,455 INFO L226 Difference]: Without dead ends: 353 [2020-10-27 06:31:52,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:31:52,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-10-27 06:31:52,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 302. [2020-10-27 06:31:52,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-10-27 06:31:52,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 446 transitions. [2020-10-27 06:31:52,501 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 446 transitions. Word has length 45 [2020-10-27 06:31:52,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:31:52,501 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 446 transitions. [2020-10-27 06:31:52,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 06:31:52,502 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 446 transitions. [2020-10-27 06:31:52,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 06:31:52,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:31:52,505 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:31:52,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 06:31:52,505 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:31:52,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:31:52,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1680285249, now seen corresponding path program 1 times [2020-10-27 06:31:52,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:31:52,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873686048] [2020-10-27 06:31:52,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:31:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:31:52,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:52,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:52,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:52,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:52,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:54,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:31:54,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 06:31:54,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 06:31:54,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1545 [2020-10-27 06:31:54,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:31:54,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 06:31:54,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:31:54,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 06:31:54,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:31:54,345 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 06:31:54,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:31:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:31:54,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:54,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:31:54,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:31:54,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:31:54,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 06:31:54,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:31:54,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:31:54,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:31:54,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:31:54,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:31:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:31:54,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873686048] [2020-10-27 06:31:54,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:31:54,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 06:31:54,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882458743] [2020-10-27 06:31:54,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 06:31:54,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:31:54,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 06:31:54,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 06:31:54,374 INFO L87 Difference]: Start difference. First operand 302 states and 446 transitions. Second operand 4 states. [2020-10-27 06:31:54,625 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 06:31:56,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:31:56,607 INFO L93 Difference]: Finished difference Result 877 states and 1316 transitions. [2020-10-27 06:31:56,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 06:31:56,608 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-10-27 06:31:56,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:31:56,613 INFO L225 Difference]: With dead ends: 877 [2020-10-27 06:31:56,613 INFO L226 Difference]: Without dead ends: 586 [2020-10-27 06:31:56,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:31:56,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2020-10-27 06:31:56,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 511. [2020-10-27 06:31:56,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-10-27 06:31:56,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 729 transitions. [2020-10-27 06:31:56,698 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 729 transitions. Word has length 49 [2020-10-27 06:31:56,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:31:56,699 INFO L481 AbstractCegarLoop]: Abstraction has 511 states and 729 transitions. [2020-10-27 06:31:56,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 06:31:56,699 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 729 transitions. [2020-10-27 06:31:56,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 06:31:56,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:31:56,702 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] [2020-10-27 06:31:56,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 06:31:56,702 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:31:56,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:31:56,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1343473523, now seen corresponding path program 1 times [2020-10-27 06:31:56,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:31:56,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018713585] [2020-10-27 06:31:56,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:31:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:31:56,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:56,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:56,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:57,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:59,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:31:59,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 06:31:59,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 06:31:59,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2872 [2020-10-27 06:31:59,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:31:59,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 06:31:59,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 06:31:59,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 06:31:59,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:31:59,941 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 06:31:59,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:31:59,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:31:59,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:59,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:31:59,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:31:59,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:31:59,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 06:31:59,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:31:59,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:31:59,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:31:59,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 06:31:59,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:31:59,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:31:59,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018713585] [2020-10-27 06:31:59,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:31:59,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 06:31:59,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114593669] [2020-10-27 06:31:59,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 06:31:59,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:31:59,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 06:31:59,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:31:59,994 INFO L87 Difference]: Start difference. First operand 511 states and 729 transitions. Second operand 7 states. [2020-10-27 06:32:00,253 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 06:32:01,125 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 06:32:01,403 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 06:32:03,017 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 06:32:03,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:32:03,279 INFO L93 Difference]: Finished difference Result 1517 states and 2165 transitions. [2020-10-27 06:32:03,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 06:32:03,280 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-27 06:32:03,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:32:03,288 INFO L225 Difference]: With dead ends: 1517 [2020-10-27 06:32:03,288 INFO L226 Difference]: Without dead ends: 1026 [2020-10-27 06:32:03,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-27 06:32:03,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2020-10-27 06:32:03,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 879. [2020-10-27 06:32:03,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 879 states. [2020-10-27 06:32:03,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1269 transitions. [2020-10-27 06:32:03,428 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1269 transitions. Word has length 53 [2020-10-27 06:32:03,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:32:03,429 INFO L481 AbstractCegarLoop]: Abstraction has 879 states and 1269 transitions. [2020-10-27 06:32:03,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 06:32:03,429 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1269 transitions. [2020-10-27 06:32:03,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 06:32:03,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:32:03,431 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] [2020-10-27 06:32:03,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 06:32:03,431 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:32:03,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:32:03,432 INFO L82 PathProgramCache]: Analyzing trace with hash -599638980, now seen corresponding path program 1 times [2020-10-27 06:32:03,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:32:03,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803426160] [2020-10-27 06:32:03,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:32:03,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:03,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:03,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:03,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:03,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:03,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:04,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:08,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:08,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 06:32:08,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 06:32:08,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 06:32:08,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:08,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 06:32:08,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 06:32:08,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 06:32:08,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:08,803 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 06:32:08,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:32:08,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:08,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:08,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:08,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:32:08,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:08,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 06:32:08,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:08,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:32:08,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:32:08,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 06:32:08,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:32:08,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:32:08,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803426160] [2020-10-27 06:32:08,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:32:08,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 06:32:08,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442678044] [2020-10-27 06:32:08,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:32:08,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:32:08,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:32:08,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:32:08,882 INFO L87 Difference]: Start difference. First operand 879 states and 1269 transitions. Second operand 5 states. [2020-10-27 06:32:09,229 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 06:32:11,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:32:11,321 INFO L93 Difference]: Finished difference Result 1908 states and 2736 transitions. [2020-10-27 06:32:11,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 06:32:11,322 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-10-27 06:32:11,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:32:11,332 INFO L225 Difference]: With dead ends: 1908 [2020-10-27 06:32:11,332 INFO L226 Difference]: Without dead ends: 1049 [2020-10-27 06:32:11,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:32:11,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2020-10-27 06:32:11,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 859. [2020-10-27 06:32:11,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 859 states. [2020-10-27 06:32:11,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1237 transitions. [2020-10-27 06:32:11,475 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1237 transitions. Word has length 54 [2020-10-27 06:32:11,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:32:11,476 INFO L481 AbstractCegarLoop]: Abstraction has 859 states and 1237 transitions. [2020-10-27 06:32:11,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:32:11,476 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1237 transitions. [2020-10-27 06:32:11,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 06:32:11,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:32:11,479 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] [2020-10-27 06:32:11,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 06:32:11,479 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:32:11,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:32:11,480 INFO L82 PathProgramCache]: Analyzing trace with hash -924201613, now seen corresponding path program 1 times [2020-10-27 06:32:11,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:32:11,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453819903] [2020-10-27 06:32:11,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:32:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:11,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:11,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:11,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:11,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:11,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:12,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:12,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 06:32:12,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 06:32:12,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 927 [2020-10-27 06:32:12,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:12,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 06:32:12,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:32:12,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 06:32:12,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:12,693 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 06:32:12,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:32:12,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:12,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:12,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:12,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:32:12,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:12,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 06:32:12,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:12,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:32:12,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:32:12,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:32:12,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:12,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:32:12,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453819903] [2020-10-27 06:32:12,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:32:12,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 06:32:12,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162773557] [2020-10-27 06:32:12,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 06:32:12,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:32:12,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 06:32:12,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 06:32:12,719 INFO L87 Difference]: Start difference. First operand 859 states and 1237 transitions. Second operand 4 states. [2020-10-27 06:32:12,975 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 06:32:14,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:32:14,867 INFO L93 Difference]: Finished difference Result 2365 states and 3457 transitions. [2020-10-27 06:32:14,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 06:32:14,868 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-27 06:32:14,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:32:14,878 INFO L225 Difference]: With dead ends: 2365 [2020-10-27 06:32:14,878 INFO L226 Difference]: Without dead ends: 1526 [2020-10-27 06:32:14,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:32:14,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2020-10-27 06:32:15,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1387. [2020-10-27 06:32:15,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1387 states. [2020-10-27 06:32:15,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 2014 transitions. [2020-10-27 06:32:15,117 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 2014 transitions. Word has length 64 [2020-10-27 06:32:15,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:32:15,117 INFO L481 AbstractCegarLoop]: Abstraction has 1387 states and 2014 transitions. [2020-10-27 06:32:15,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 06:32:15,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 2014 transitions. [2020-10-27 06:32:15,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 06:32:15,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:32:15,121 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] [2020-10-27 06:32:15,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 06:32:15,121 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:32:15,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:32:15,122 INFO L82 PathProgramCache]: Analyzing trace with hash -707661063, now seen corresponding path program 1 times [2020-10-27 06:32:15,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:32:15,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222231911] [2020-10-27 06:32:15,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:32:15,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:15,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:15,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:15,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:15,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:15,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:15,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:15,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:20,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:20,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 06:32:20,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 06:32:20,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 06:32:20,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:20,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 06:32:20,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:32:20,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 06:32:20,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:20,389 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 06:32:20,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:32:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:20,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:20,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:20,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:32:20,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:20,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 06:32:20,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:20,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:32:20,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:32:20,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:32:20,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:20,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 06:32:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:20,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:20,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:20,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 06:32:20,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:20,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 06:32:20,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:20,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:32:20,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 06:32:20,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 06:32:20,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:20,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:32:20,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222231911] [2020-10-27 06:32:20,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:32:20,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 06:32:20,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288219509] [2020-10-27 06:32:20,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 06:32:20,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:32:20,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 06:32:20,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 06:32:20,554 INFO L87 Difference]: Start difference. First operand 1387 states and 2014 transitions. Second operand 6 states. [2020-10-27 06:32:20,805 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 06:32:21,572 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 06:32:24,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:32:24,803 INFO L93 Difference]: Finished difference Result 4965 states and 7499 transitions. [2020-10-27 06:32:24,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 06:32:24,804 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-27 06:32:24,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:32:24,831 INFO L225 Difference]: With dead ends: 4965 [2020-10-27 06:32:24,831 INFO L226 Difference]: Without dead ends: 3595 [2020-10-27 06:32:24,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-27 06:32:24,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3595 states. [2020-10-27 06:32:25,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3595 to 3318. [2020-10-27 06:32:25,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3318 states. [2020-10-27 06:32:25,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3318 states to 3318 states and 4900 transitions. [2020-10-27 06:32:25,396 INFO L78 Accepts]: Start accepts. Automaton has 3318 states and 4900 transitions. Word has length 78 [2020-10-27 06:32:25,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:32:25,397 INFO L481 AbstractCegarLoop]: Abstraction has 3318 states and 4900 transitions. [2020-10-27 06:32:25,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 06:32:25,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3318 states and 4900 transitions. [2020-10-27 06:32:25,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 06:32:25,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:32:25,401 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] [2020-10-27 06:32:25,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 06:32:25,401 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:32:25,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:32:25,402 INFO L82 PathProgramCache]: Analyzing trace with hash -809234224, now seen corresponding path program 1 times [2020-10-27 06:32:25,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:32:25,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535878216] [2020-10-27 06:32:25,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:32:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:25,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:25,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:25,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:25,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:25,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 06:32:25,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 06:32:25,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 552 [2020-10-27 06:32:25,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:25,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 06:32:25,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 06:32:25,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 06:32:25,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:26,336 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 06:32:26,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:32:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:26,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:26,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:26,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:32:26,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:26,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 06:32:26,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:26,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:32:26,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:32:26,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:32:26,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:26,504 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-27 06:32:26,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 06:32:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:26,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:26,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:26,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 06:32:26,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:26,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 06:32:26,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:26,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:32:26,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:32:26,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 06:32:26,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:26,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:32:26,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535878216] [2020-10-27 06:32:26,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:32:26,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 06:32:26,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522987087] [2020-10-27 06:32:26,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 06:32:26,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:32:26,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 06:32:26,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 06:32:26,600 INFO L87 Difference]: Start difference. First operand 3318 states and 4900 transitions. Second operand 10 states. [2020-10-27 06:32:26,889 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 06:32:27,390 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 06:32:27,740 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 06:32:28,302 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 06:32:28,609 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 06:32:30,057 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 06:32:30,434 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 06:32:30,877 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 06:32:32,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:32:32,772 INFO L93 Difference]: Finished difference Result 7704 states and 11640 transitions. [2020-10-27 06:32:32,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 06:32:32,773 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 78 [2020-10-27 06:32:32,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:32:32,800 INFO L225 Difference]: With dead ends: 7704 [2020-10-27 06:32:32,801 INFO L226 Difference]: Without dead ends: 4404 [2020-10-27 06:32:32,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2020-10-27 06:32:32,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4404 states. [2020-10-27 06:32:33,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4404 to 4095. [2020-10-27 06:32:33,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4095 states. [2020-10-27 06:32:33,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4095 states to 4095 states and 6010 transitions. [2020-10-27 06:32:33,555 INFO L78 Accepts]: Start accepts. Automaton has 4095 states and 6010 transitions. Word has length 78 [2020-10-27 06:32:33,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:32:33,555 INFO L481 AbstractCegarLoop]: Abstraction has 4095 states and 6010 transitions. [2020-10-27 06:32:33,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 06:32:33,555 INFO L276 IsEmpty]: Start isEmpty. Operand 4095 states and 6010 transitions. [2020-10-27 06:32:33,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 06:32:33,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:32:33,560 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] [2020-10-27 06:32:33,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 06:32:33,560 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:32:33,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:32:33,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1218089895, now seen corresponding path program 1 times [2020-10-27 06:32:33,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:32:33,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235423537] [2020-10-27 06:32:33,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:32:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:33,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:33,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:34,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:34,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 06:32:34,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 06:32:34,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 721 [2020-10-27 06:32:34,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:34,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 06:32:34,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 06:32:34,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 06:32:34,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:34,620 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 06:32:34,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:32:34,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:34,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:34,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:34,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:32:34,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:34,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 06:32:34,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:34,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:32:34,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:32:34,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:32:34,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:34,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 06:32:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:34,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:34,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:34,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 06:32:34,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:34,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 06:32:34,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:34,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:32:34,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:32:34,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 06:32:34,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:34,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:32:34,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235423537] [2020-10-27 06:32:34,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:32:34,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 06:32:34,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78335272] [2020-10-27 06:32:34,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 06:32:34,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:32:34,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 06:32:34,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 06:32:34,812 INFO L87 Difference]: Start difference. First operand 4095 states and 6010 transitions. Second operand 10 states. [2020-10-27 06:32:35,097 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 06:32:35,646 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 06:32:35,991 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 06:32:37,450 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 06:32:37,760 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 06:32:37,898 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-10-27 06:32:38,181 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 06:32:38,551 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 06:32:40,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:32:40,779 INFO L93 Difference]: Finished difference Result 6828 states and 10082 transitions. [2020-10-27 06:32:40,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 06:32:40,780 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 79 [2020-10-27 06:32:40,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:32:40,803 INFO L225 Difference]: With dead ends: 6828 [2020-10-27 06:32:40,803 INFO L226 Difference]: Without dead ends: 4379 [2020-10-27 06:32:40,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-27 06:32:40,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4379 states. [2020-10-27 06:32:41,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4379 to 4077. [2020-10-27 06:32:41,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4077 states. [2020-10-27 06:32:41,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4077 states to 4077 states and 5968 transitions. [2020-10-27 06:32:41,341 INFO L78 Accepts]: Start accepts. Automaton has 4077 states and 5968 transitions. Word has length 79 [2020-10-27 06:32:41,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:32:41,342 INFO L481 AbstractCegarLoop]: Abstraction has 4077 states and 5968 transitions. [2020-10-27 06:32:41,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 06:32:41,342 INFO L276 IsEmpty]: Start isEmpty. Operand 4077 states and 5968 transitions. [2020-10-27 06:32:41,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 06:32:41,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:32:41,348 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:32:41,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 06:32:41,349 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:32:41,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:32:41,349 INFO L82 PathProgramCache]: Analyzing trace with hash 380070558, now seen corresponding path program 1 times [2020-10-27 06:32:41,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:32:41,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725067284] [2020-10-27 06:32:41,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:32:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:41,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:41,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:41,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:41,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:41,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:41,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:41,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:41,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:42,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:43,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:43,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:46,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:46,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 06:32:46,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 06:32:46,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 06:32:46,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:46,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 06:32:46,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:32:46,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 06:32:46,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:46,643 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 06:32:46,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:32:46,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:46,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:46,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:46,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:32:46,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:46,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 06:32:46,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:46,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:32:46,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:32:46,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:32:46,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:46,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 06:32:46,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:46,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:46,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:46,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 06:32:46,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:46,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 06:32:46,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:46,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:32:46,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 06:32:46,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 06:32:46,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:46,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-27 06:32:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:46,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:46,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:46,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:46,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 06:32:46,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 06:32:46,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 06:32:46,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:46,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:32:46,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 06:32:46,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 06:32:46,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:46,861 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 06:32:46,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725067284] [2020-10-27 06:32:46,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 06:32:46,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 06:32:46,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888026770] [2020-10-27 06:32:46,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 06:32:46,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:32:46,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 06:32:46,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 06:32:46,865 INFO L87 Difference]: Start difference. First operand 4077 states and 5968 transitions. Second operand 8 states. [2020-10-27 06:32:47,138 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 06:32:47,854 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 06:32:48,940 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 06:32:51,202 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 06:32:56,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:32:56,403 INFO L93 Difference]: Finished difference Result 13483 states and 25107 transitions. [2020-10-27 06:32:56,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 06:32:56,404 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 91 [2020-10-27 06:32:56,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:32:56,499 INFO L225 Difference]: With dead ends: 13483 [2020-10-27 06:32:56,499 INFO L226 Difference]: Without dead ends: 9775 [2020-10-27 06:32:56,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2020-10-27 06:32:56,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9775 states. [2020-10-27 06:32:58,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9775 to 8885. [2020-10-27 06:32:58,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8885 states. [2020-10-27 06:32:58,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8885 states to 8885 states and 15567 transitions. [2020-10-27 06:32:58,181 INFO L78 Accepts]: Start accepts. Automaton has 8885 states and 15567 transitions. Word has length 91 [2020-10-27 06:32:58,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:32:58,182 INFO L481 AbstractCegarLoop]: Abstraction has 8885 states and 15567 transitions. [2020-10-27 06:32:58,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 06:32:58,182 INFO L276 IsEmpty]: Start isEmpty. Operand 8885 states and 15567 transitions. [2020-10-27 06:32:58,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 06:32:58,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:32:58,189 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:32:58,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 06:32:58,190 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:32:58,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:32:58,190 INFO L82 PathProgramCache]: Analyzing trace with hash 299251170, now seen corresponding path program 1 times [2020-10-27 06:32:58,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:32:58,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808146927] [2020-10-27 06:32:58,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:32:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:58,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:58,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:58,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:58,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:58,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:59,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:59,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:59,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:03,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:03,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 06:33:03,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 06:33:03,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 06:33:03,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:03,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 06:33:03,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:33:03,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 06:33:03,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:03,471 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 06:33:03,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:33:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:03,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:03,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:03,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:33:03,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:33:03,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 06:33:03,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:03,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:33:03,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:33:03,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:33:03,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:03,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 06:33:03,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:03,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:03,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:03,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 06:33:03,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:33:03,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 06:33:03,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:03,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:33:03,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 06:33:03,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 06:33:03,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:03,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 06:33:03,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:03,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:03,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:03,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 06:33:03,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:33:03,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 06:33:03,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:03,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:33:03,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 06:33:03,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:33:03,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 06:33:03,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808146927] [2020-10-27 06:33:03,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 06:33:03,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 06:33:03,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983350854] [2020-10-27 06:33:03,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 06:33:03,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:33:03,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 06:33:03,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:33:03,639 INFO L87 Difference]: Start difference. First operand 8885 states and 15567 transitions. Second operand 7 states. [2020-10-27 06:33:03,899 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 06:33:04,721 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 06:33:08,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:33:08,423 INFO L93 Difference]: Finished difference Result 22876 states and 47448 transitions. [2020-10-27 06:33:08,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 06:33:08,424 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-10-27 06:33:08,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:33:08,578 INFO L225 Difference]: With dead ends: 22876 [2020-10-27 06:33:08,578 INFO L226 Difference]: Without dead ends: 14396 [2020-10-27 06:33:08,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-10-27 06:33:08,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14396 states. [2020-10-27 06:33:11,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14396 to 13011. [2020-10-27 06:33:11,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13011 states. [2020-10-27 06:33:11,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13011 states to 13011 states and 26182 transitions. [2020-10-27 06:33:11,170 INFO L78 Accepts]: Start accepts. Automaton has 13011 states and 26182 transitions. Word has length 95 [2020-10-27 06:33:11,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:33:11,170 INFO L481 AbstractCegarLoop]: Abstraction has 13011 states and 26182 transitions. [2020-10-27 06:33:11,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 06:33:11,170 INFO L276 IsEmpty]: Start isEmpty. Operand 13011 states and 26182 transitions. [2020-10-27 06:33:11,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 06:33:11,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:33:11,181 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:33:11,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 06:33:11,181 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:33:11,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:33:11,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1441560899, now seen corresponding path program 1 times [2020-10-27 06:33:11,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:33:11,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287293493] [2020-10-27 06:33:11,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:33:11,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:11,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:11,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:11,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:11,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:11,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:11,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:11,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:11,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:12,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:12,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:16,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:16,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 06:33:16,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 06:33:16,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 06:33:16,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:16,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 06:33:16,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 06:33:16,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 06:33:16,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:16,461 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 06:33:16,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:33:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:16,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:16,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:16,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:33:16,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:33:16,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 06:33:16,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:16,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:33:16,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:33:16,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:33:16,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:16,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 06:33:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:16,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:16,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:16,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 06:33:16,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:33:16,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 06:33:16,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:16,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:33:16,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 06:33:16,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 06:33:16,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:16,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-27 06:33:16,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:16,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:16,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:16,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 06:33:16,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:33:16,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 06:33:16,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:16,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:33:16,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 06:33:16,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:33:16,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 06:33:16,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287293493] [2020-10-27 06:33:16,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 06:33:16,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 06:33:16,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847729344] [2020-10-27 06:33:16,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 06:33:16,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:33:16,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 06:33:16,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 06:33:16,698 INFO L87 Difference]: Start difference. First operand 13011 states and 26182 transitions. Second operand 6 states. [2020-10-27 06:33:16,947 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 06:33:22,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:33:22,003 INFO L93 Difference]: Finished difference Result 35520 states and 85956 transitions. [2020-10-27 06:33:22,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 06:33:22,004 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 107 [2020-10-27 06:33:22,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:33:22,520 INFO L225 Difference]: With dead ends: 35520 [2020-10-27 06:33:22,520 INFO L226 Difference]: Without dead ends: 22527 [2020-10-27 06:33:22,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-10-27 06:33:22,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22527 states. [2020-10-27 06:33:26,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22527 to 20262. [2020-10-27 06:33:26,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20262 states. [2020-10-27 06:33:27,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20262 states to 20262 states and 46161 transitions. [2020-10-27 06:33:27,410 INFO L78 Accepts]: Start accepts. Automaton has 20262 states and 46161 transitions. Word has length 107 [2020-10-27 06:33:27,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:33:27,410 INFO L481 AbstractCegarLoop]: Abstraction has 20262 states and 46161 transitions. [2020-10-27 06:33:27,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 06:33:27,410 INFO L276 IsEmpty]: Start isEmpty. Operand 20262 states and 46161 transitions. [2020-10-27 06:33:27,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 06:33:27,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:33:27,428 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:33:27,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 06:33:27,428 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:33:27,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:33:27,429 INFO L82 PathProgramCache]: Analyzing trace with hash -464842367, now seen corresponding path program 1 times [2020-10-27 06:33:27,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:33:27,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511755949] [2020-10-27 06:33:27,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:33:27,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:27,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:27,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:27,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:27,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:27,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:27,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:27,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:28,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:28,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:29,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:29,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:32,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:32,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 06:33:32,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 06:33:32,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 06:33:32,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:32,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:33:32,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:33:32,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 06:33:32,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:32,705 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 06:33:32,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:33:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:32,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:32,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:32,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:33:32,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:33:32,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 06:33:32,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:32,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:33:32,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:33:32,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:33:32,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:32,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 06:33:32,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:32,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:32,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:32,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 06:33:32,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:33:32,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 06:33:32,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:32,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:33:32,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 06:33:32,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:33:32,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:32,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-27 06:33:32,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:32,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:32,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:32,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 06:33:32,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:33:32,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 06:33:32,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:32,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:33:32,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 06:33:32,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:33:32,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:32,854 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-27 06:33:32,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511755949] [2020-10-27 06:33:32,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:33:32,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:33:32,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394177667] [2020-10-27 06:33:32,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:33:32,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:33:32,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:33:32,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:33:32,856 INFO L87 Difference]: Start difference. First operand 20262 states and 46161 transitions. Second operand 5 states. [2020-10-27 06:33:33,159 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 06:33:37,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:33:37,271 INFO L93 Difference]: Finished difference Result 39843 states and 89670 transitions. [2020-10-27 06:33:37,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 06:33:37,272 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 107 [2020-10-27 06:33:37,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:33:37,759 INFO L225 Difference]: With dead ends: 39843 [2020-10-27 06:33:37,759 INFO L226 Difference]: Without dead ends: 19599 [2020-10-27 06:33:38,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:33:38,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19599 states. [2020-10-27 06:33:42,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19599 to 19178. [2020-10-27 06:33:42,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19178 states. [2020-10-27 06:33:42,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19178 states to 19178 states and 42911 transitions. [2020-10-27 06:33:42,323 INFO L78 Accepts]: Start accepts. Automaton has 19178 states and 42911 transitions. Word has length 107 [2020-10-27 06:33:42,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:33:42,324 INFO L481 AbstractCegarLoop]: Abstraction has 19178 states and 42911 transitions. [2020-10-27 06:33:42,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:33:42,324 INFO L276 IsEmpty]: Start isEmpty. Operand 19178 states and 42911 transitions. [2020-10-27 06:33:42,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 06:33:42,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:33:42,333 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:33:42,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 06:33:42,333 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:33:42,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:33:42,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1266451770, now seen corresponding path program 1 times [2020-10-27 06:33:42,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:33:42,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871324887] [2020-10-27 06:33:42,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:33:42,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:42,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:42,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:42,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:42,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:42,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:42,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:43,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:43,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:44,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:46,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:46,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 06:33:46,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 06:33:46,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4215 [2020-10-27 06:33:46,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:46,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 06:33:46,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 06:33:46,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 06:33:46,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:46,921 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 06:33:46,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:33:46,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:46,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:46,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:46,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:33:46,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:33:46,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 06:33:46,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:46,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:33:46,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:33:46,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:33:46,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:47,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 06:33:47,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:47,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:47,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:47,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 06:33:47,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:33:47,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 06:33:47,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:47,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:33:47,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:33:47,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 06:33:47,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:47,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-27 06:33:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:47,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:47,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:47,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 06:33:47,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:33:47,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 06:33:47,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:47,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 06:33:47,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 06:33:47,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 06:33:47,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:47,221 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 06:33:47,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871324887] [2020-10-27 06:33:47,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 06:33:47,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 06:33:47,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935173340] [2020-10-27 06:33:47,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 06:33:47,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:33:47,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 06:33:47,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-27 06:33:47,224 INFO L87 Difference]: Start difference. First operand 19178 states and 42911 transitions. Second operand 14 states. [2020-10-27 06:33:47,788 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 167 [2020-10-27 06:33:48,565 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 170 [2020-10-27 06:33:49,230 WARN L193 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 173 [2020-10-27 06:33:50,151 WARN L193 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 170 [2020-10-27 06:33:50,741 WARN L193 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 173 [2020-10-27 06:33:51,642 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 170 [2020-10-27 06:33:52,524 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-27 06:33:53,282 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 06:33:53,670 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 06:33:54,246 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 169 [2020-10-27 06:33:54,899 WARN L193 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 172 [2020-10-27 06:33:55,785 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 06:33:57,895 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 06:33:58,814 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 06:33:59,674 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 06:34:00,019 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 06:34:00,359 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 06:34:00,779 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 06:34:01,237 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 06:34:02,290 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 06:34:04,069 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 06:34:05,216 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 06:34:05,590 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 06:34:08,929 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 06:34:09,360 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 06:34:09,722 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 06:34:10,422 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 06:34:22,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:34:22,546 INFO L93 Difference]: Finished difference Result 90475 states and 403469 transitions. [2020-10-27 06:34:22,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-27 06:34:22,547 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 108 [2020-10-27 06:34:22,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:34:24,461 INFO L225 Difference]: With dead ends: 90475 [2020-10-27 06:34:24,461 INFO L226 Difference]: Without dead ends: 72035 [2020-10-27 06:34:25,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1568 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=710, Invalid=4120, Unknown=0, NotChecked=0, Total=4830 [2020-10-27 06:34:25,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72035 states.