/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:44:33,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:44:33,118 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:44:33,154 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:44:33,155 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:44:33,156 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:44:33,158 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:44:33,161 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:44:33,163 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:44:33,164 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:44:33,166 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:44:33,167 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:44:33,168 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:44:33,169 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:44:33,171 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:44:33,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:44:33,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:44:33,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:44:33,188 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:44:33,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:44:33,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:44:33,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:44:33,203 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:44:33,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:44:33,207 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:44:33,208 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:44:33,208 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:44:33,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:44:33,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:44:33,211 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:44:33,212 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:44:33,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:44:33,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:44:33,215 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:44:33,216 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:44:33,217 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:44:33,218 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:44:33,218 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:44:33,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:44:33,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:44:33,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:44:33,222 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 23:44:33,251 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:44:33,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:44:33,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:44:33,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:44:33,253 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:44:33,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:44:33,254 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:44:33,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:44:33,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:44:33,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:44:33,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:44:33,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:44:33,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:44:33,255 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:44:33,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:44:33,256 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:44:33,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:44:33,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:44:33,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:44:33,257 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:44:33,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:44:33,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:44:33,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:44:33,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:44:33,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:44:33,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:44:33,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:44:33,258 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:44:33,259 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:44:33,259 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:44:33,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:44:33,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:44:33,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:44:33,778 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:44:33,779 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:44:33,781 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+sep-reducer.c [2020-10-27 23:44:33,873 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/83d4f41e6/94f0633a02a34c89b694788eecce0a7f/FLAG893d2717d [2020-10-27 23:44:34,706 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:44:34,707 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+sep-reducer.c [2020-10-27 23:44:34,747 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/83d4f41e6/94f0633a02a34c89b694788eecce0a7f/FLAG893d2717d [2020-10-27 23:44:34,920 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/83d4f41e6/94f0633a02a34c89b694788eecce0a7f [2020-10-27 23:44:34,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:44:34,931 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:44:34,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:44:34,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:44:34,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:44:34,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:44:34" (1/1) ... [2020-10-27 23:44:34,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33743a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:34, skipping insertion in model container [2020-10-27 23:44:34,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:44:34" (1/1) ... [2020-10-27 23:44:34,950 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:44:35,038 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:44:35,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:44:35,787 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:44:36,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:44:36,066 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:44:36,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:36 WrapperNode [2020-10-27 23:44:36,067 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:44:36,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:44:36,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:44:36,068 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:44:36,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:36" (1/1) ... [2020-10-27 23:44:36,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:36" (1/1) ... [2020-10-27 23:44:36,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:36" (1/1) ... [2020-10-27 23:44:36,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:36" (1/1) ... [2020-10-27 23:44:36,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:36" (1/1) ... [2020-10-27 23:44:36,189 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:36" (1/1) ... [2020-10-27 23:44:36,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:36" (1/1) ... [2020-10-27 23:44:36,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:44:36,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:44:36,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:44:36,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:44:36,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:36" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:44:36,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:44:36,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:44:36,318 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:44:36,318 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:44:36,318 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:44:36,318 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:44:36,318 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:44:36,318 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:44:36,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:44:36,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:44:36,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:44:36,319 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:44:36,319 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:44:36,319 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:44:36,320 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:44:36,320 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:44:36,320 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:44:36,320 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:44:36,320 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 23:44:36,320 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:44:36,321 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:44:36,321 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:44:36,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:44:36,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:44:36,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:44:36,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:44:36,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:44:36,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:44:38,860 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:44:38,860 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:44:38,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:44:38 BoogieIcfgContainer [2020-10-27 23:44:38,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:44:38,865 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:44:38,865 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:44:38,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:44:38,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:44:34" (1/3) ... [2020-10-27 23:44:38,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a994c9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:44:38, skipping insertion in model container [2020-10-27 23:44:38,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:36" (2/3) ... [2020-10-27 23:44:38,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a994c9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:44:38, skipping insertion in model container [2020-10-27 23:44:38,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:44:38" (3/3) ... [2020-10-27 23:44:38,872 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+sep-reducer.c [2020-10-27 23:44:38,885 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:44:38,891 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:44:38,905 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:44:38,937 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:44:38,937 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:44:38,938 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:44:38,938 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:44:38,938 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:44:38,938 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:44:38,938 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:44:38,938 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:44:38,972 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states. [2020-10-27 23:44:38,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:44:38,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:38,992 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] [2020-10-27 23:44:38,993 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:38,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:39,000 INFO L82 PathProgramCache]: Analyzing trace with hash 445602210, now seen corresponding path program 1 times [2020-10-27 23:44:39,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:39,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019993716] [2020-10-27 23:44:39,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:39,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:39,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:39,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:40,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:41,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:41,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:42,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:43,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:43,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:43,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:43,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:44,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:44,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:44:44,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 23:44:44,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 23:44:44,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:44,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:44:44,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:44:44,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 23:44:44,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 23:44:45,558 WARN L193 SmtUtils]: Spent 881.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 23:44:45,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:45,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:45,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:45,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:45,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:45,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 23:44:45,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:45,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:45,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:45,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:45,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:45,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:44:45,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019993716] [2020-10-27 23:44:45,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:45,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:44:45,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414446510] [2020-10-27 23:44:45,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:44:45,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:45,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:44:45,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:44:45,686 INFO L87 Difference]: Start difference. First operand 579 states. Second operand 7 states. [2020-10-27 23:44:46,691 WARN L193 SmtUtils]: Spent 883.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2020-10-27 23:44:52,543 WARN L193 SmtUtils]: Spent 863.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-27 23:44:53,462 WARN L193 SmtUtils]: Spent 844.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2020-10-27 23:44:54,774 WARN L193 SmtUtils]: Spent 843.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2020-10-27 23:44:55,703 WARN L193 SmtUtils]: Spent 870.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-27 23:44:57,255 WARN L193 SmtUtils]: Spent 854.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2020-10-27 23:44:58,112 WARN L193 SmtUtils]: Spent 819.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2020-10-27 23:44:59,209 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2020-10-27 23:44:59,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:59,286 INFO L93 Difference]: Finished difference Result 1416 states and 2333 transitions. [2020-10-27 23:44:59,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:44:59,291 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-10-27 23:44:59,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:59,328 INFO L225 Difference]: With dead ends: 1416 [2020-10-27 23:44:59,328 INFO L226 Difference]: Without dead ends: 1206 [2020-10-27 23:44:59,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:44:59,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2020-10-27 23:44:59,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 714. [2020-10-27 23:44:59,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 714 states. [2020-10-27 23:44:59,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 936 transitions. [2020-10-27 23:44:59,507 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 936 transitions. Word has length 65 [2020-10-27 23:44:59,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:59,507 INFO L481 AbstractCegarLoop]: Abstraction has 714 states and 936 transitions. [2020-10-27 23:44:59,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:44:59,508 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 936 transitions. [2020-10-27 23:44:59,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:44:59,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:59,513 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] [2020-10-27 23:44:59,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:44:59,514 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:59,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:59,515 INFO L82 PathProgramCache]: Analyzing trace with hash -965646780, now seen corresponding path program 1 times [2020-10-27 23:44:59,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:59,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370171129] [2020-10-27 23:44:59,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:59,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:59,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:59,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:00,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:00,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:01,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:02,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:03,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:03,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:04,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:04,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:04,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:45:04,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:45:04,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-27 23:45:04,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:04,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:45:04,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:45:04,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 23:45:04,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:05,576 WARN L193 SmtUtils]: Spent 844.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 23:45:05,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:05,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:05,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:05,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:05,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:05,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 23:45:05,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:05,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:05,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:05,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:05,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:45:05,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370171129] [2020-10-27 23:45:05,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:05,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:45:05,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508855783] [2020-10-27 23:45:05,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:45:05,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:05,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:45:05,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:45:05,641 INFO L87 Difference]: Start difference. First operand 714 states and 936 transitions. Second operand 6 states. [2020-10-27 23:45:06,607 WARN L193 SmtUtils]: Spent 887.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-27 23:45:10,384 WARN L193 SmtUtils]: Spent 933.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2020-10-27 23:45:11,553 WARN L193 SmtUtils]: Spent 892.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-27 23:45:12,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:12,840 INFO L93 Difference]: Finished difference Result 1960 states and 2729 transitions. [2020-10-27 23:45:12,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 23:45:12,841 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-27 23:45:12,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:12,852 INFO L225 Difference]: With dead ends: 1960 [2020-10-27 23:45:12,852 INFO L226 Difference]: Without dead ends: 1779 [2020-10-27 23:45:12,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:45:12,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2020-10-27 23:45:12,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1446. [2020-10-27 23:45:12,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1446 states. [2020-10-27 23:45:12,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 2004 transitions. [2020-10-27 23:45:12,945 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 2004 transitions. Word has length 65 [2020-10-27 23:45:12,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:12,945 INFO L481 AbstractCegarLoop]: Abstraction has 1446 states and 2004 transitions. [2020-10-27 23:45:12,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:45:12,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 2004 transitions. [2020-10-27 23:45:12,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:45:12,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:12,949 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] [2020-10-27 23:45:12,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:45:12,950 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:12,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:12,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1509097892, now seen corresponding path program 1 times [2020-10-27 23:45:12,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:12,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924631338] [2020-10-27 23:45:12,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:13,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:13,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:13,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:13,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:14,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:15,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:16,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:17,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:18,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:18,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:45:18,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:45:18,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 23:45:18,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:18,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:45:18,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:45:18,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 23:45:18,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:18,895 WARN L193 SmtUtils]: Spent 768.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 23:45:18,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:18,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:18,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:18,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:18,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:18,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 23:45:18,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:18,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:18,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:18,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:18,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:18,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:45:18,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924631338] [2020-10-27 23:45:18,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:18,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:45:18,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876114503] [2020-10-27 23:45:18,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:45:18,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:18,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:45:18,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:45:18,960 INFO L87 Difference]: Start difference. First operand 1446 states and 2004 transitions. Second operand 7 states. [2020-10-27 23:45:19,973 WARN L193 SmtUtils]: Spent 932.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2020-10-27 23:45:23,998 WARN L193 SmtUtils]: Spent 921.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-27 23:45:24,985 WARN L193 SmtUtils]: Spent 924.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2020-10-27 23:45:26,103 WARN L193 SmtUtils]: Spent 786.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2020-10-27 23:45:26,994 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-27 23:45:28,550 WARN L193 SmtUtils]: Spent 825.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2020-10-27 23:45:29,503 WARN L193 SmtUtils]: Spent 913.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2020-10-27 23:45:30,568 WARN L193 SmtUtils]: Spent 829.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2020-10-27 23:45:30,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:30,599 INFO L93 Difference]: Finished difference Result 2651 states and 3766 transitions. [2020-10-27 23:45:30,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:45:30,606 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-10-27 23:45:30,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:30,620 INFO L225 Difference]: With dead ends: 2651 [2020-10-27 23:45:30,620 INFO L226 Difference]: Without dead ends: 2263 [2020-10-27 23:45:30,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:45:30,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2020-10-27 23:45:30,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 1346. [2020-10-27 23:45:30,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1346 states. [2020-10-27 23:45:30,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 1862 transitions. [2020-10-27 23:45:30,707 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 1862 transitions. Word has length 65 [2020-10-27 23:45:30,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:30,708 INFO L481 AbstractCegarLoop]: Abstraction has 1346 states and 1862 transitions. [2020-10-27 23:45:30,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:45:30,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 1862 transitions. [2020-10-27 23:45:30,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:45:30,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:30,712 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] [2020-10-27 23:45:30,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:45:30,713 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:30,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:30,714 INFO L82 PathProgramCache]: Analyzing trace with hash 2123568343, now seen corresponding path program 1 times [2020-10-27 23:45:30,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:30,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793137171] [2020-10-27 23:45:30,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:30,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:30,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:30,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:31,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:31,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:32,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:32,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:33,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:33,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:34,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:35,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:35,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:35,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:45:35,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 23:45:35,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 23:45:35,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:35,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:45:35,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:45:35,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 23:45:35,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:36,730 WARN L193 SmtUtils]: Spent 825.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 23:45:36,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:36,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:36,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:36,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:36,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:36,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 23:45:36,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:36,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:36,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:36,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:36,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:36,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:45:36,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793137171] [2020-10-27 23:45:36,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:36,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:45:36,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785040702] [2020-10-27 23:45:36,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:45:36,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:36,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:45:36,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:45:36,794 INFO L87 Difference]: Start difference. First operand 1346 states and 1862 transitions. Second operand 7 states. [2020-10-27 23:45:37,785 WARN L193 SmtUtils]: Spent 898.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2020-10-27 23:45:41,193 WARN L193 SmtUtils]: Spent 916.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-27 23:45:42,336 WARN L193 SmtUtils]: Spent 909.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2020-10-27 23:45:43,395 WARN L193 SmtUtils]: Spent 887.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-27 23:45:44,314 WARN L193 SmtUtils]: Spent 879.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2020-10-27 23:45:46,025 WARN L193 SmtUtils]: Spent 840.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2020-10-27 23:45:46,875 WARN L193 SmtUtils]: Spent 823.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2020-10-27 23:45:48,030 WARN L193 SmtUtils]: Spent 911.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2020-10-27 23:45:48,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:48,093 INFO L93 Difference]: Finished difference Result 5751 states and 8439 transitions. [2020-10-27 23:45:48,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:45:48,094 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-10-27 23:45:48,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:48,122 INFO L225 Difference]: With dead ends: 5751 [2020-10-27 23:45:48,122 INFO L226 Difference]: Without dead ends: 5147 [2020-10-27 23:45:48,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:45:48,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5147 states. [2020-10-27 23:45:48,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5147 to 2212. [2020-10-27 23:45:48,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2212 states. [2020-10-27 23:45:48,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 3146 transitions. [2020-10-27 23:45:48,294 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 3146 transitions. Word has length 65 [2020-10-27 23:45:48,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:48,294 INFO L481 AbstractCegarLoop]: Abstraction has 2212 states and 3146 transitions. [2020-10-27 23:45:48,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:45:48,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 3146 transitions. [2020-10-27 23:45:48,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:45:48,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:48,297 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] [2020-10-27 23:45:48,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:45:48,297 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:48,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:48,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1721728547, now seen corresponding path program 1 times [2020-10-27 23:45:48,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:48,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918177657] [2020-10-27 23:45:48,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:48,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:48,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:48,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:48,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:49,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:49,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:49,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:49,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:50,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:53,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:53,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:45:53,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:45:53,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:45:53,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:53,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:45:53,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:45:53,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 23:45:53,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:54,368 WARN L193 SmtUtils]: Spent 924.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 23:45:54,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:54,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:54,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:54,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:54,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:54,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:54,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:45:54,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:54,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:54,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:54,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:54,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:45:54,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918177657] [2020-10-27 23:45:54,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:54,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:45:54,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356644519] [2020-10-27 23:45:54,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:45:54,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:54,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:45:54,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:45:54,410 INFO L87 Difference]: Start difference. First operand 2212 states and 3146 transitions. Second operand 7 states. [2020-10-27 23:45:55,343 WARN L193 SmtUtils]: Spent 851.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2020-10-27 23:45:58,501 WARN L193 SmtUtils]: Spent 894.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2020-10-27 23:45:59,671 WARN L193 SmtUtils]: Spent 909.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-27 23:46:00,737 WARN L193 SmtUtils]: Spent 875.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2020-10-27 23:46:01,674 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-27 23:46:03,472 WARN L193 SmtUtils]: Spent 916.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2020-10-27 23:46:04,403 WARN L193 SmtUtils]: Spent 895.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2020-10-27 23:46:05,559 WARN L193 SmtUtils]: Spent 927.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2020-10-27 23:46:05,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:05,585 INFO L93 Difference]: Finished difference Result 6520 states and 9576 transitions. [2020-10-27 23:46:05,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:46:05,588 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-10-27 23:46:05,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:05,612 INFO L225 Difference]: With dead ends: 6520 [2020-10-27 23:46:05,612 INFO L226 Difference]: Without dead ends: 5505 [2020-10-27 23:46:05,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:46:05,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5505 states. [2020-10-27 23:46:05,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5505 to 3197. [2020-10-27 23:46:05,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3197 states. [2020-10-27 23:46:05,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 4597 transitions. [2020-10-27 23:46:05,868 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 4597 transitions. Word has length 65 [2020-10-27 23:46:05,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:05,869 INFO L481 AbstractCegarLoop]: Abstraction has 3197 states and 4597 transitions. [2020-10-27 23:46:05,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:46:05,869 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 4597 transitions. [2020-10-27 23:46:05,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:46:05,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:05,871 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] [2020-10-27 23:46:05,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:46:05,872 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:05,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:05,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1292976802, now seen corresponding path program 1 times [2020-10-27 23:46:05,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:05,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489196389] [2020-10-27 23:46:05,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:05,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:06,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:06,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:06,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:06,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:06,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:06,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:06,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:06,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:10,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:10,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:46:10,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:46:10,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:46:10,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:10,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:46:10,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:46:10,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 23:46:10,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:11,784 WARN L193 SmtUtils]: Spent 795.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 23:46:11,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:11,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:11,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:11,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:11,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:11,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 23:46:11,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:11,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:11,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:11,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:11,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:11,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:46:11,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489196389] [2020-10-27 23:46:11,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:11,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:46:11,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212066106] [2020-10-27 23:46:11,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:46:11,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:11,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:46:11,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:46:11,878 INFO L87 Difference]: Start difference. First operand 3197 states and 4597 transitions. Second operand 6 states. [2020-10-27 23:46:12,832 WARN L193 SmtUtils]: Spent 886.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-27 23:46:16,290 WARN L193 SmtUtils]: Spent 893.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2020-10-27 23:46:17,396 WARN L193 SmtUtils]: Spent 892.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-27 23:46:19,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:19,358 INFO L93 Difference]: Finished difference Result 12566 states and 18854 transitions. [2020-10-27 23:46:19,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 23:46:19,359 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-27 23:46:19,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:19,405 INFO L225 Difference]: With dead ends: 12566 [2020-10-27 23:46:19,405 INFO L226 Difference]: Without dead ends: 10721 [2020-10-27 23:46:19,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:46:19,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10721 states. [2020-10-27 23:46:19,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10721 to 6322. [2020-10-27 23:46:19,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6322 states. [2020-10-27 23:46:19,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6322 states to 6322 states and 9337 transitions. [2020-10-27 23:46:19,967 INFO L78 Accepts]: Start accepts. Automaton has 6322 states and 9337 transitions. Word has length 65 [2020-10-27 23:46:19,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:19,968 INFO L481 AbstractCegarLoop]: Abstraction has 6322 states and 9337 transitions. [2020-10-27 23:46:19,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:46:19,968 INFO L276 IsEmpty]: Start isEmpty. Operand 6322 states and 9337 transitions. [2020-10-27 23:46:19,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 23:46:19,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:19,971 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] [2020-10-27 23:46:19,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:46:19,972 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:19,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:19,972 INFO L82 PathProgramCache]: Analyzing trace with hash 868169035, now seen corresponding path program 1 times [2020-10-27 23:46:19,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:19,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437979600] [2020-10-27 23:46:19,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:20,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:20,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:20,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:20,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:20,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:20,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:20,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:21,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:24,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:24,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:24,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:25,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:25,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 23:46:25,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:46:25,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-27 23:46:25,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:25,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:46:25,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:46:25,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 23:46:25,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:26,032 WARN L193 SmtUtils]: Spent 903.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 23:46:26,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:26,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:26,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:26,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:26,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:26,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 23:46:26,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:26,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:26,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:26,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:26,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:46:26,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437979600] [2020-10-27 23:46:26,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:26,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:46:26,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680801124] [2020-10-27 23:46:26,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:46:26,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:26,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:46:26,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:46:26,080 INFO L87 Difference]: Start difference. First operand 6322 states and 9337 transitions. Second operand 6 states. [2020-10-27 23:46:27,010 WARN L193 SmtUtils]: Spent 867.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-27 23:46:30,193 WARN L193 SmtUtils]: Spent 843.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2020-10-27 23:46:31,206 WARN L193 SmtUtils]: Spent 832.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-27 23:46:33,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:33,037 INFO L93 Difference]: Finished difference Result 15545 states and 23311 transitions. [2020-10-27 23:46:33,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 23:46:33,038 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-27 23:46:33,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:33,077 INFO L225 Difference]: With dead ends: 15545 [2020-10-27 23:46:33,077 INFO L226 Difference]: Without dead ends: 13926 [2020-10-27 23:46:33,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:46:33,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13926 states. [2020-10-27 23:46:33,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13926 to 8794. [2020-10-27 23:46:33,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8794 states. [2020-10-27 23:46:33,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8794 states to 8794 states and 13059 transitions. [2020-10-27 23:46:33,702 INFO L78 Accepts]: Start accepts. Automaton has 8794 states and 13059 transitions. Word has length 67 [2020-10-27 23:46:33,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:33,702 INFO L481 AbstractCegarLoop]: Abstraction has 8794 states and 13059 transitions. [2020-10-27 23:46:33,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:46:33,702 INFO L276 IsEmpty]: Start isEmpty. Operand 8794 states and 13059 transitions. [2020-10-27 23:46:33,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 23:46:33,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:33,705 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] [2020-10-27 23:46:33,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:46:33,706 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:33,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:33,706 INFO L82 PathProgramCache]: Analyzing trace with hash -426155862, now seen corresponding path program 1 times [2020-10-27 23:46:33,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:33,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591443516] [2020-10-27 23:46:33,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:33,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:33,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:33,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:33,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:34,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:34,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:34,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:37,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:37,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:37,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:37,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:38,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:38,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:38,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:38,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:38,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 23:46:38,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:46:38,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 23:46:38,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:38,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:46:38,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:46:38,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 23:46:38,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:39,636 WARN L193 SmtUtils]: Spent 818.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 23:46:39,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:39,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:39,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:39,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:39,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:39,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:39,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 23:46:39,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:39,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:39,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:39,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:39,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:39,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:46:39,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591443516] [2020-10-27 23:46:39,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:39,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:46:39,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436707310] [2020-10-27 23:46:39,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:46:39,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:39,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:46:39,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:46:39,681 INFO L87 Difference]: Start difference. First operand 8794 states and 13059 transitions. Second operand 6 states. [2020-10-27 23:46:40,608 WARN L193 SmtUtils]: Spent 866.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-27 23:46:43,662 WARN L193 SmtUtils]: Spent 860.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2020-10-27 23:46:44,672 WARN L193 SmtUtils]: Spent 838.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-27 23:46:46,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:46,517 INFO L93 Difference]: Finished difference Result 10495 states and 15594 transitions. [2020-10-27 23:46:46,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 23:46:46,518 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-27 23:46:46,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:46,543 INFO L225 Difference]: With dead ends: 10495 [2020-10-27 23:46:46,543 INFO L226 Difference]: Without dead ends: 9642 [2020-10-27 23:46:46,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:46:46,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9642 states. [2020-10-27 23:46:47,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9642 to 8754. [2020-10-27 23:46:47,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8754 states. [2020-10-27 23:46:47,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8754 states to 8754 states and 13002 transitions. [2020-10-27 23:46:47,166 INFO L78 Accepts]: Start accepts. Automaton has 8754 states and 13002 transitions. Word has length 67 [2020-10-27 23:46:47,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:47,166 INFO L481 AbstractCegarLoop]: Abstraction has 8754 states and 13002 transitions. [2020-10-27 23:46:47,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:46:47,166 INFO L276 IsEmpty]: Start isEmpty. Operand 8754 states and 13002 transitions. [2020-10-27 23:46:47,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 23:46:47,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:47,170 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] [2020-10-27 23:46:47,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:46:47,170 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:47,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:47,171 INFO L82 PathProgramCache]: Analyzing trace with hash -998339452, now seen corresponding path program 1 times [2020-10-27 23:46:47,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:47,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763156804] [2020-10-27 23:46:47,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:47,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:47,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:47,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:47,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:47,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:47,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:50,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:50,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:52,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:52,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 23:46:52,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:46:52,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 23:46:52,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:52,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:46:52,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:46:52,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 23:46:52,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:53,341 WARN L193 SmtUtils]: Spent 902.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 23:46:53,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:53,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:53,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:53,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:53,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:53,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 23:46:53,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:53,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:53,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:53,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:53,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:46:53,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763156804] [2020-10-27 23:46:53,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:53,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:46:53,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037531317] [2020-10-27 23:46:53,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:46:53,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:53,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:46:53,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:46:53,398 INFO L87 Difference]: Start difference. First operand 8754 states and 13002 transitions. Second operand 9 states. [2020-10-27 23:46:54,397 WARN L193 SmtUtils]: Spent 915.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-27 23:46:57,955 WARN L193 SmtUtils]: Spent 950.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-27 23:46:59,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:59,641 INFO L93 Difference]: Finished difference Result 15632 states and 23478 transitions. [2020-10-27 23:46:59,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:46:59,642 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 67 [2020-10-27 23:46:59,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:59,670 INFO L225 Difference]: With dead ends: 15632 [2020-10-27 23:46:59,670 INFO L226 Difference]: Without dead ends: 13764 [2020-10-27 23:46:59,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-27 23:46:59,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13764 states. [2020-10-27 23:47:00,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13764 to 8697. [2020-10-27 23:47:00,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8697 states. [2020-10-27 23:47:00,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8697 states to 8697 states and 12905 transitions. [2020-10-27 23:47:00,280 INFO L78 Accepts]: Start accepts. Automaton has 8697 states and 12905 transitions. Word has length 67 [2020-10-27 23:47:00,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:47:00,281 INFO L481 AbstractCegarLoop]: Abstraction has 8697 states and 12905 transitions. [2020-10-27 23:47:00,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:47:00,281 INFO L276 IsEmpty]: Start isEmpty. Operand 8697 states and 12905 transitions. [2020-10-27 23:47:00,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 23:47:00,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:47:00,283 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] [2020-10-27 23:47:00,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:47:00,284 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:47:00,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:47:00,284 INFO L82 PathProgramCache]: Analyzing trace with hash -319914876, now seen corresponding path program 1 times [2020-10-27 23:47:00,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:47:00,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900332566] [2020-10-27 23:47:00,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:47:00,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:00,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:00,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:00,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:00,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:01,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:01,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:01,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:02,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:02,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:02,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:03,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:04,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:04,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:04,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:05,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:05,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:05,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 23:47:05,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:47:05,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 23:47:05,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:05,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:47:05,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:47:05,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 23:47:05,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:06,551 WARN L193 SmtUtils]: Spent 881.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 23:47:06,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:47:06,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:06,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:06,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:06,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:47:06,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:47:06,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 23:47:06,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:06,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:47:06,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:47:06,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:47:06,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:47:06,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900332566] [2020-10-27 23:47:06,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:47:06,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:47:06,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419515427] [2020-10-27 23:47:06,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:47:06,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:47:06,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:47:06,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:47:06,605 INFO L87 Difference]: Start difference. First operand 8697 states and 12905 transitions. Second operand 10 states. [2020-10-27 23:47:08,915 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 364 DAG size of output: 362 [2020-10-27 23:47:12,882 WARN L193 SmtUtils]: Spent 821.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2020-10-27 23:47:13,892 WARN L193 SmtUtils]: Spent 838.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-27 23:47:16,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:47:16,299 INFO L93 Difference]: Finished difference Result 16895 states and 25206 transitions. [2020-10-27 23:47:16,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 23:47:16,299 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-10-27 23:47:16,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:47:16,329 INFO L225 Difference]: With dead ends: 16895 [2020-10-27 23:47:16,329 INFO L226 Difference]: Without dead ends: 11948 [2020-10-27 23:47:16,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2020-10-27 23:47:16,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11948 states. [2020-10-27 23:47:16,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11948 to 6303. [2020-10-27 23:47:16,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6303 states. [2020-10-27 23:47:16,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6303 states to 6303 states and 9246 transitions. [2020-10-27 23:47:16,959 INFO L78 Accepts]: Start accepts. Automaton has 6303 states and 9246 transitions. Word has length 67 [2020-10-27 23:47:16,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:47:16,959 INFO L481 AbstractCegarLoop]: Abstraction has 6303 states and 9246 transitions. [2020-10-27 23:47:16,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:47:16,959 INFO L276 IsEmpty]: Start isEmpty. Operand 6303 states and 9246 transitions. [2020-10-27 23:47:16,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 23:47:16,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:47:16,961 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] [2020-10-27 23:47:16,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:47:16,962 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:47:16,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:47:16,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1795259119, now seen corresponding path program 1 times [2020-10-27 23:47:16,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:47:16,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675847886] [2020-10-27 23:47:16,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:47:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:17,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:17,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:17,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:17,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:17,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:17,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:18,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:18,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:19,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:19,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:20,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:20,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:20,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:20,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:20,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:22,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:22,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 23:47:22,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:47:22,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 23:47:22,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:22,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:47:22,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:47:22,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 23:47:22,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:22,860 WARN L193 SmtUtils]: Spent 789.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 23:47:22,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:47:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:22,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:22,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:22,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:47:22,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:47:22,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:47:22,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:22,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:47:22,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:47:22,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:47:22,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:47:22,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675847886] [2020-10-27 23:47:22,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:47:22,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:47:22,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322046839] [2020-10-27 23:47:22,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:47:22,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:47:22,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:47:22,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:47:22,904 INFO L87 Difference]: Start difference. First operand 6303 states and 9246 transitions. Second operand 6 states. [2020-10-27 23:47:23,814 WARN L193 SmtUtils]: Spent 852.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-27 23:47:26,635 WARN L193 SmtUtils]: Spent 824.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2020-10-27 23:47:27,651 WARN L193 SmtUtils]: Spent 824.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-27 23:47:29,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:47:29,775 INFO L93 Difference]: Finished difference Result 10765 states and 16002 transitions. [2020-10-27 23:47:29,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 23:47:29,775 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-27 23:47:29,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:47:29,788 INFO L225 Difference]: With dead ends: 10765 [2020-10-27 23:47:29,789 INFO L226 Difference]: Without dead ends: 9556 [2020-10-27 23:47:29,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:47:29,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9556 states. [2020-10-27 23:47:30,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9556 to 6295. [2020-10-27 23:47:30,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6295 states. [2020-10-27 23:47:30,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6295 states to 6295 states and 9234 transitions. [2020-10-27 23:47:30,308 INFO L78 Accepts]: Start accepts. Automaton has 6295 states and 9234 transitions. Word has length 67 [2020-10-27 23:47:30,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:47:30,309 INFO L481 AbstractCegarLoop]: Abstraction has 6295 states and 9234 transitions. [2020-10-27 23:47:30,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:47:30,309 INFO L276 IsEmpty]: Start isEmpty. Operand 6295 states and 9234 transitions. [2020-10-27 23:47:30,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 23:47:30,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:47:30,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:47:30,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:47:30,312 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:47:30,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:47:30,313 INFO L82 PathProgramCache]: Analyzing trace with hash 593538227, now seen corresponding path program 1 times [2020-10-27 23:47:30,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:47:30,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407426753] [2020-10-27 23:47:30,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:47:30,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:30,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:30,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:30,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:30,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:30,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:31,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:32,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:32,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:32,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:32,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:34,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:34,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:35,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:35,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 23:47:35,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:47:35,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:47:35,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:35,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:47:35,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 23:47:35,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 23:47:35,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:36,262 WARN L193 SmtUtils]: Spent 855.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 23:47:36,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:47:36,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:36,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:36,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:36,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:47:36,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:47:36,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:47:36,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:36,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:47:36,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:47:36,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:47:36,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:36,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:47:36,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407426753] [2020-10-27 23:47:36,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:47:36,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:47:36,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953117111] [2020-10-27 23:47:36,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:47:36,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:47:36,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:47:36,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:47:36,296 INFO L87 Difference]: Start difference. First operand 6295 states and 9234 transitions. Second operand 6 states. [2020-10-27 23:47:37,178 WARN L193 SmtUtils]: Spent 820.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-27 23:47:40,123 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2020-10-27 23:47:41,223 WARN L193 SmtUtils]: Spent 889.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-27 23:47:44,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:47:44,019 INFO L93 Difference]: Finished difference Result 21359 states and 32063 transitions. [2020-10-27 23:47:44,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:47:44,020 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-27 23:47:44,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:47:44,046 INFO L225 Difference]: With dead ends: 21359 [2020-10-27 23:47:44,047 INFO L226 Difference]: Without dead ends: 19351 [2020-10-27 23:47:44,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:47:44,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19351 states. [2020-10-27 23:47:44,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19351 to 9341. [2020-10-27 23:47:44,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9341 states. [2020-10-27 23:47:44,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9341 states to 9341 states and 13832 transitions. [2020-10-27 23:47:44,910 INFO L78 Accepts]: Start accepts. Automaton has 9341 states and 13832 transitions. Word has length 67 [2020-10-27 23:47:44,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:47:44,911 INFO L481 AbstractCegarLoop]: Abstraction has 9341 states and 13832 transitions. [2020-10-27 23:47:44,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:47:44,911 INFO L276 IsEmpty]: Start isEmpty. Operand 9341 states and 13832 transitions. [2020-10-27 23:47:44,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 23:47:44,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:47:44,913 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] [2020-10-27 23:47:44,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:47:44,913 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:47:44,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:47:44,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1523114391, now seen corresponding path program 1 times [2020-10-27 23:47:44,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:47:44,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625201448] [2020-10-27 23:47:44,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:47:44,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:44,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:44,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:45,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:45,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:45,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:45,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:46,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:46,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:46,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:47,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:47,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:47,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:49,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:49,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 23:47:49,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:47:49,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 23:47:49,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:49,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:47:49,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:47:49,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 23:47:49,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:51,050 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 23:47:51,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:47:51,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:51,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:51,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:51,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:47:51,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:47:51,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 23:47:51,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:51,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:47:51,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:47:51,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:47:51,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:47:51,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625201448] [2020-10-27 23:47:51,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:47:51,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:47:51,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285142547] [2020-10-27 23:47:51,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:47:51,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:47:51,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:47:51,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:47:51,160 INFO L87 Difference]: Start difference. First operand 9341 states and 13832 transitions. Second operand 11 states. [2020-10-27 23:47:52,239 WARN L193 SmtUtils]: Spent 965.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2020-10-27 23:47:55,997 WARN L193 SmtUtils]: Spent 841.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-27 23:47:56,875 WARN L193 SmtUtils]: Spent 811.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-27 23:47:57,915 WARN L193 SmtUtils]: Spent 855.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2020-10-27 23:48:02,042 WARN L193 SmtUtils]: Spent 956.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-27 23:48:04,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:48:04,939 INFO L93 Difference]: Finished difference Result 31313 states and 46309 transitions. [2020-10-27 23:48:04,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 23:48:04,939 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-10-27 23:48:04,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:48:04,979 INFO L225 Difference]: With dead ends: 31313 [2020-10-27 23:48:04,979 INFO L226 Difference]: Without dead ends: 31306 [2020-10-27 23:48:04,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=318, Invalid=1404, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 23:48:05,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31306 states. [2020-10-27 23:48:05,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31306 to 9341. [2020-10-27 23:48:05,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9341 states. [2020-10-27 23:48:05,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9341 states to 9341 states and 13829 transitions. [2020-10-27 23:48:05,985 INFO L78 Accepts]: Start accepts. Automaton has 9341 states and 13829 transitions. Word has length 67 [2020-10-27 23:48:05,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:48:05,985 INFO L481 AbstractCegarLoop]: Abstraction has 9341 states and 13829 transitions. [2020-10-27 23:48:05,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:48:05,985 INFO L276 IsEmpty]: Start isEmpty. Operand 9341 states and 13829 transitions. [2020-10-27 23:48:05,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 23:48:05,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:48:05,988 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] [2020-10-27 23:48:05,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 23:48:05,989 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:48:05,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:48:05,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1270044957, now seen corresponding path program 1 times [2020-10-27 23:48:05,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:48:05,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888401969] [2020-10-27 23:48:05,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:48:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:06,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:06,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:06,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:06,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:06,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:06,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:06,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:07,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:07,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:08,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:09,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:09,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:11,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:11,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 23:48:11,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:48:11,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:48:11,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:11,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:48:11,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:48:11,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 23:48:11,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:48:12,012 WARN L193 SmtUtils]: Spent 797.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 23:48:12,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:48:12,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:12,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:12,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:12,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:48:12,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:48:12,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:48:12,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:12,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:48:12,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:48:12,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:48:12,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:48:12,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:48:12,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888401969] [2020-10-27 23:48:12,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:48:12,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:48:12,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115816765] [2020-10-27 23:48:12,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:48:12,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:48:12,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:48:12,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:48:12,051 INFO L87 Difference]: Start difference. First operand 9341 states and 13829 transitions. Second operand 11 states. [2020-10-27 23:48:13,176 WARN L193 SmtUtils]: Spent 935.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2020-10-27 23:48:17,011 WARN L193 SmtUtils]: Spent 922.00 ms on a formula simplification that was a NOOP. DAG size: 349