/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-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:15:21,792 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:15:21,794 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:15:21,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:15:21,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:15:21,832 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:15:21,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:15:21,836 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:15:21,838 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:15:21,839 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:15:21,841 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:15:21,842 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:15:21,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:15:21,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:15:21,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:15:21,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:15:21,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:15:21,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:15:21,851 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:15:21,854 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:15:21,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:15:21,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:15:21,859 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:15:21,860 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:15:21,873 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:15:21,873 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:15:21,874 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:15:21,875 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:15:21,876 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:15:21,877 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:15:21,877 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:15:21,878 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:15:21,879 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:15:21,880 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:15:21,881 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:15:21,882 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:15:21,883 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:15:21,883 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:15:21,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:15:21,884 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:15:21,885 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:15:21,886 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 00:15:21,915 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:15:21,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:15:21,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:15:21,917 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:15:21,917 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:15:21,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:15:21,918 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:15:21,918 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:15:21,918 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:15:21,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:15:21,919 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:15:21,919 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:15:21,923 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:15:21,923 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:15:21,923 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:15:21,924 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:15:21,924 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:15:21,924 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:15:21,924 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:15:21,924 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:15:21,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:15:21,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:15:21,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:15:21,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:15:21,925 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:15:21,926 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:15:21,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:15:21,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:15:21,927 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:15:21,927 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:15:22,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:15:22,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:15:22,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:15:22,406 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:15:22,407 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:15:22,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-28 00:15:22,497 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/00635a13d/35ae240bbc0a448d9302df0bff3472b2/FLAG3d83dd62a [2020-10-28 00:15:23,129 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:15:23,130 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-28 00:15:23,144 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/00635a13d/35ae240bbc0a448d9302df0bff3472b2/FLAG3d83dd62a [2020-10-28 00:15:23,482 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/00635a13d/35ae240bbc0a448d9302df0bff3472b2 [2020-10-28 00:15:23,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:15:23,497 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:15:23,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:15:23,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:15:23,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:15:23,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:15:23" (1/1) ... [2020-10-28 00:15:23,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21ec7e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:15:23, skipping insertion in model container [2020-10-28 00:15:23,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:15:23" (1/1) ... [2020-10-28 00:15:23,524 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:15:23,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:15:23,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:15:23,977 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:15:24,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:15:24,115 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:15:24,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:15:24 WrapperNode [2020-10-28 00:15:24,116 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:15:24,117 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:15:24,117 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:15:24,117 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:15:24,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:15:24" (1/1) ... [2020-10-28 00:15:24,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:15:24" (1/1) ... [2020-10-28 00:15:24,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:15:24" (1/1) ... [2020-10-28 00:15:24,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:15:24" (1/1) ... [2020-10-28 00:15:24,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:15:24" (1/1) ... [2020-10-28 00:15:24,175 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:15:24" (1/1) ... [2020-10-28 00:15:24,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:15:24" (1/1) ... [2020-10-28 00:15:24,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:15:24,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:15:24,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:15:24,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:15:24,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:15:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:15:24,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:15:24,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:15:24,274 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:15:24,275 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:15:24,275 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:15:24,275 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:15:24,275 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:15:24,275 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:15:24,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:15:24,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:15:24,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:15:24,276 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:15:24,276 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:15:24,276 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:15:24,276 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:15:24,277 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:15:24,277 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:15:24,277 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:15:24,277 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:15:24,277 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 00:15:24,277 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:15:24,278 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:15:24,278 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:15:24,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:15:24,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:15:24,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:15:24,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:15:24,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:15:24,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:15:25,201 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:15:25,203 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:15:25,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:15:25 BoogieIcfgContainer [2020-10-28 00:15:25,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:15:25,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:15:25,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:15:25,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:15:25,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:15:23" (1/3) ... [2020-10-28 00:15:25,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5245f6ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:15:25, skipping insertion in model container [2020-10-28 00:15:25,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:15:24" (2/3) ... [2020-10-28 00:15:25,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5245f6ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:15:25, skipping insertion in model container [2020-10-28 00:15:25,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:15:25" (3/3) ... [2020-10-28 00:15:25,217 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-28 00:15:25,229 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:15:25,238 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:15:25,254 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:15:25,294 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:15:25,294 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:15:25,295 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:15:25,295 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:15:25,295 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:15:25,295 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:15:25,295 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:15:25,295 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:15:25,321 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states. [2020-10-28 00:15:25,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 00:15:25,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:15:25,331 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] [2020-10-28 00:15:25,332 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:15:25,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:15:25,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1110750841, now seen corresponding path program 1 times [2020-10-28 00:15:25,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:15:25,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865121219] [2020-10-28 00:15:25,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:15:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:25,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:25,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:26,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:26,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:26,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:28,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:30,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:30,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 00:15:30,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:15:30,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 00:15:30,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:30,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:15:30,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 00:15:30,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:15:30,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:15:31,112 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:15:31,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:15:31,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:31,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:31,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:31,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:15:31,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:15:31,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 00:15:31,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:31,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:15:31,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:15:31,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:15:31,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:15:31,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865121219] [2020-10-28 00:15:31,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:15:31,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:15:31,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347358355] [2020-10-28 00:15:31,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:15:31,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:15:31,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:15:31,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:15:31,219 INFO L87 Difference]: Start difference. First operand 145 states. Second operand 4 states. [2020-10-28 00:15:31,555 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 00:15:32,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:15:32,347 INFO L93 Difference]: Finished difference Result 335 states and 537 transitions. [2020-10-28 00:15:32,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:15:32,349 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-28 00:15:32,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:15:32,363 INFO L225 Difference]: With dead ends: 335 [2020-10-28 00:15:32,363 INFO L226 Difference]: Without dead ends: 221 [2020-10-28 00:15:32,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:15:32,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-28 00:15:32,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 218. [2020-10-28 00:15:32,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-10-28 00:15:32,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 324 transitions. [2020-10-28 00:15:32,442 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 324 transitions. Word has length 65 [2020-10-28 00:15:32,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:15:32,443 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 324 transitions. [2020-10-28 00:15:32,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:15:32,443 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 324 transitions. [2020-10-28 00:15:32,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 00:15:32,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:15:32,448 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] [2020-10-28 00:15:32,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:15:32,449 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:15:32,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:15:32,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1194206418, now seen corresponding path program 1 times [2020-10-28 00:15:32,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:15:32,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856253353] [2020-10-28 00:15:32,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:15:32,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:32,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:32,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:32,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:32,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:33,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:36,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:36,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 00:15:36,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:15:36,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3817 [2020-10-28 00:15:36,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:36,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:15:36,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:15:36,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:15:36,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-28 00:15:36,869 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:15:36,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:15:36,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:36,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:36,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:36,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:15:36,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:15:36,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 00:15:36,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:36,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:15:36,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:15:36,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:15:36,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:15:36,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:15:36,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856253353] [2020-10-28 00:15:36,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:15:36,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:15:36,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452165008] [2020-10-28 00:15:36,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:15:36,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:15:36,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:15:36,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:15:36,955 INFO L87 Difference]: Start difference. First operand 218 states and 324 transitions. Second operand 4 states. [2020-10-28 00:15:37,277 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 00:15:38,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:15:38,051 INFO L93 Difference]: Finished difference Result 544 states and 842 transitions. [2020-10-28 00:15:38,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:15:38,052 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-28 00:15:38,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:15:38,059 INFO L225 Difference]: With dead ends: 544 [2020-10-28 00:15:38,059 INFO L226 Difference]: Without dead ends: 365 [2020-10-28 00:15:38,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:15:38,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-28 00:15:38,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 362. [2020-10-28 00:15:38,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-10-28 00:15:38,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 553 transitions. [2020-10-28 00:15:38,116 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 553 transitions. Word has length 66 [2020-10-28 00:15:38,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:15:38,116 INFO L481 AbstractCegarLoop]: Abstraction has 362 states and 553 transitions. [2020-10-28 00:15:38,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:15:38,117 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 553 transitions. [2020-10-28 00:15:38,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 00:15:38,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:15:38,120 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] [2020-10-28 00:15:38,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:15:38,120 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:15:38,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:15:38,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1030288880, now seen corresponding path program 1 times [2020-10-28 00:15:38,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:15:38,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539159087] [2020-10-28 00:15:38,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:15:38,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:38,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:38,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:38,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:38,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:40,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:40,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 00:15:40,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 00:15:40,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1874 [2020-10-28 00:15:40,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:40,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:15:40,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 00:15:40,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:15:40,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 00:15:40,378 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:15:40,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:15:40,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:40,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:40,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:40,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:15:40,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:15:40,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:15:40,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:40,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:15:40,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:15:40,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:15:40,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:15:40,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539159087] [2020-10-28 00:15:40,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:15:40,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:15:40,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655976819] [2020-10-28 00:15:40,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:15:40,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:15:40,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:15:40,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:15:40,424 INFO L87 Difference]: Start difference. First operand 362 states and 553 transitions. Second operand 4 states. [2020-10-28 00:15:40,731 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 00:15:41,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:15:41,562 INFO L93 Difference]: Finished difference Result 944 states and 1477 transitions. [2020-10-28 00:15:41,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:15:41,563 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-28 00:15:41,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:15:41,569 INFO L225 Difference]: With dead ends: 944 [2020-10-28 00:15:41,570 INFO L226 Difference]: Without dead ends: 621 [2020-10-28 00:15:41,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:15:41,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2020-10-28 00:15:41,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 618. [2020-10-28 00:15:41,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 618 states. [2020-10-28 00:15:41,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 957 transitions. [2020-10-28 00:15:41,631 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 957 transitions. Word has length 67 [2020-10-28 00:15:41,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:15:41,632 INFO L481 AbstractCegarLoop]: Abstraction has 618 states and 957 transitions. [2020-10-28 00:15:41,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:15:41,632 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 957 transitions. [2020-10-28 00:15:41,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 00:15:41,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:15:41,640 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:15:41,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:15:41,640 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:15:41,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:15:41,641 INFO L82 PathProgramCache]: Analyzing trace with hash 2089080781, now seen corresponding path program 1 times [2020-10-28 00:15:41,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:15:41,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125141223] [2020-10-28 00:15:41,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:15:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:41,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:41,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:41,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:42,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:42,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 00:15:42,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 00:15:42,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 944 [2020-10-28 00:15:42,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:42,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:15:42,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 00:15:42,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:15:42,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 00:15:42,941 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:15:42,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:15:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:42,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:42,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:42,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:15:42,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:15:42,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:15:42,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:42,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:15:42,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:15:42,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:15:42,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:15:42,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125141223] [2020-10-28 00:15:42,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:15:42,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:15:42,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789337334] [2020-10-28 00:15:42,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:15:42,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:15:42,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:15:42,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:15:42,994 INFO L87 Difference]: Start difference. First operand 618 states and 957 transitions. Second operand 4 states. [2020-10-28 00:15:43,299 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 00:15:44,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:15:44,229 INFO L93 Difference]: Finished difference Result 1648 states and 2585 transitions. [2020-10-28 00:15:44,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:15:44,230 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-28 00:15:44,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:15:44,236 INFO L225 Difference]: With dead ends: 1648 [2020-10-28 00:15:44,237 INFO L226 Difference]: Without dead ends: 1069 [2020-10-28 00:15:44,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:15:44,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2020-10-28 00:15:44,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 1066. [2020-10-28 00:15:44,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2020-10-28 00:15:44,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1657 transitions. [2020-10-28 00:15:44,294 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1657 transitions. Word has length 68 [2020-10-28 00:15:44,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:15:44,295 INFO L481 AbstractCegarLoop]: Abstraction has 1066 states and 1657 transitions. [2020-10-28 00:15:44,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:15:44,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1657 transitions. [2020-10-28 00:15:44,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:15:44,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:15:44,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:15:44,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:15:44,297 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:15:44,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:15:44,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1449400453, now seen corresponding path program 1 times [2020-10-28 00:15:44,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:15:44,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749959586] [2020-10-28 00:15:44,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:15:44,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:44,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:44,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:44,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:44,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:15:44,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:15:44,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 513 [2020-10-28 00:15:44,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:44,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:15:44,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 00:15:44,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:15:44,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:45,146 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:15:45,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:15:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:45,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:45,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:45,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:15:45,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:15:45,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:15:45,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:45,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:15:45,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:15:45,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:15:45,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:15:45,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749959586] [2020-10-28 00:15:45,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:15:45,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:15:45,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248368147] [2020-10-28 00:15:45,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:15:45,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:15:45,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:15:45,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:15:45,192 INFO L87 Difference]: Start difference. First operand 1066 states and 1657 transitions. Second operand 4 states. [2020-10-28 00:15:45,493 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 00:15:46,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:15:46,424 INFO L93 Difference]: Finished difference Result 2864 states and 4477 transitions. [2020-10-28 00:15:46,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:15:46,425 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-28 00:15:46,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:15:46,436 INFO L225 Difference]: With dead ends: 2864 [2020-10-28 00:15:46,436 INFO L226 Difference]: Without dead ends: 1837 [2020-10-28 00:15:46,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:15:46,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1837 states. [2020-10-28 00:15:46,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1837 to 1834. [2020-10-28 00:15:46,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1834 states. [2020-10-28 00:15:46,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1834 states to 1834 states and 2841 transitions. [2020-10-28 00:15:46,541 INFO L78 Accepts]: Start accepts. Automaton has 1834 states and 2841 transitions. Word has length 69 [2020-10-28 00:15:46,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:15:46,541 INFO L481 AbstractCegarLoop]: Abstraction has 1834 states and 2841 transitions. [2020-10-28 00:15:46,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:15:46,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1834 states and 2841 transitions. [2020-10-28 00:15:46,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 00:15:46,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:15:46,542 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:15:46,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:15:46,543 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:15:46,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:15:46,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1885363672, now seen corresponding path program 1 times [2020-10-28 00:15:46,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:15:46,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863599541] [2020-10-28 00:15:46,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:15:46,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:46,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:46,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:48,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:48,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 00:15:48,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:15:48,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1672 [2020-10-28 00:15:48,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:48,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 00:15:48,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 00:15:48,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 00:15:48,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:48,574 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:15:48,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:15:48,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:48,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:48,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:48,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:15:48,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:15:48,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:15:48,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:48,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:15:48,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:15:48,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:15:48,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:48,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:15:48,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863599541] [2020-10-28 00:15:48,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:15:48,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 00:15:48,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267174571] [2020-10-28 00:15:48,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 00:15:48,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:15:48,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 00:15:48,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:15:48,621 INFO L87 Difference]: Start difference. First operand 1834 states and 2841 transitions. Second operand 8 states. [2020-10-28 00:15:49,000 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-28 00:15:50,198 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 00:15:50,494 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 00:15:50,821 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-28 00:15:51,137 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-28 00:15:51,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:15:51,604 INFO L93 Difference]: Finished difference Result 12604 states and 19653 transitions. [2020-10-28 00:15:51,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:15:51,605 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-28 00:15:51,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:15:51,660 INFO L225 Difference]: With dead ends: 12604 [2020-10-28 00:15:51,660 INFO L226 Difference]: Without dead ends: 10809 [2020-10-28 00:15:51,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-28 00:15:51,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10809 states. [2020-10-28 00:15:51,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10809 to 3626. [2020-10-28 00:15:52,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3626 states. [2020-10-28 00:15:52,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 5577 transitions. [2020-10-28 00:15:52,016 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 5577 transitions. Word has length 70 [2020-10-28 00:15:52,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:15:52,016 INFO L481 AbstractCegarLoop]: Abstraction has 3626 states and 5577 transitions. [2020-10-28 00:15:52,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 00:15:52,017 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 5577 transitions. [2020-10-28 00:15:52,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:15:52,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:15:52,018 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:15:52,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:15:52,018 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:15:52,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:15:52,019 INFO L82 PathProgramCache]: Analyzing trace with hash 2036889234, now seen corresponding path program 1 times [2020-10-28 00:15:52,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:15:52,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373950769] [2020-10-28 00:15:52,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:15:52,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:52,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:52,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:52,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:52,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:15:52,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:15:52,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 920 [2020-10-28 00:15:52,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:52,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:15:52,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-28 00:15:52,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:15:52,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:53,328 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:15:53,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:15:53,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:53,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:53,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:53,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:15:53,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:15:53,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 00:15:53,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:53,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:15:53,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:15:53,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:15:53,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:15:53,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373950769] [2020-10-28 00:15:53,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:15:53,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:15:53,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551337672] [2020-10-28 00:15:53,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:15:53,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:15:53,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:15:53,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:15:53,389 INFO L87 Difference]: Start difference. First operand 3626 states and 5577 transitions. Second operand 5 states. [2020-10-28 00:15:54,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:15:54,990 INFO L93 Difference]: Finished difference Result 7341 states and 11243 transitions. [2020-10-28 00:15:54,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:15:54,991 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-28 00:15:54,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:15:55,029 INFO L225 Difference]: With dead ends: 7341 [2020-10-28 00:15:55,029 INFO L226 Difference]: Without dead ends: 7338 [2020-10-28 00:15:55,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:15:55,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7338 states. [2020-10-28 00:15:55,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7338 to 3754. [2020-10-28 00:15:55,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3754 states. [2020-10-28 00:15:55,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3754 states to 3754 states and 5705 transitions. [2020-10-28 00:15:55,444 INFO L78 Accepts]: Start accepts. Automaton has 3754 states and 5705 transitions. Word has length 71 [2020-10-28 00:15:55,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:15:55,444 INFO L481 AbstractCegarLoop]: Abstraction has 3754 states and 5705 transitions. [2020-10-28 00:15:55,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:15:55,444 INFO L276 IsEmpty]: Start isEmpty. Operand 3754 states and 5705 transitions. [2020-10-28 00:15:55,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 00:15:55,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:15:55,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:15:55,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:15:55,452 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:15:55,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:15:55,452 INFO L82 PathProgramCache]: Analyzing trace with hash -983025591, now seen corresponding path program 1 times [2020-10-28 00:15:55,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:15:55,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339231251] [2020-10-28 00:15:55,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:15:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:55,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:55,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:56,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:56,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 00:15:56,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:15:56,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 681 [2020-10-28 00:15:56,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:56,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 00:15:56,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 00:15:56,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 00:15:56,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:56,560 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:15:56,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:15:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:56,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:56,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:56,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:15:56,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:15:56,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:15:56,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:56,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:15:56,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:15:56,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:15:56,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:15:56,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339231251] [2020-10-28 00:15:56,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:15:56,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 00:15:56,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620478106] [2020-10-28 00:15:56,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 00:15:56,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:15:56,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 00:15:56,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:15:56,632 INFO L87 Difference]: Start difference. First operand 3754 states and 5705 transitions. Second operand 8 states. [2020-10-28 00:15:57,664 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-28 00:15:57,960 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-28 00:15:58,269 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-28 00:15:58,587 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 00:15:58,903 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 00:16:00,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:16:00,924 INFO L93 Difference]: Finished difference Result 19609 states and 29555 transitions. [2020-10-28 00:16:00,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:16:00,925 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 72 [2020-10-28 00:16:00,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:16:00,991 INFO L225 Difference]: With dead ends: 19609 [2020-10-28 00:16:00,991 INFO L226 Difference]: Without dead ends: 15894 [2020-10-28 00:16:01,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:16:01,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15894 states. [2020-10-28 00:16:02,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15894 to 15882. [2020-10-28 00:16:02,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15882 states. [2020-10-28 00:16:02,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15882 states to 15882 states and 23817 transitions. [2020-10-28 00:16:02,450 INFO L78 Accepts]: Start accepts. Automaton has 15882 states and 23817 transitions. Word has length 72 [2020-10-28 00:16:02,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:16:02,451 INFO L481 AbstractCegarLoop]: Abstraction has 15882 states and 23817 transitions. [2020-10-28 00:16:02,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 00:16:02,452 INFO L276 IsEmpty]: Start isEmpty. Operand 15882 states and 23817 transitions. [2020-10-28 00:16:02,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 00:16:02,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:16:02,453 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:16:02,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:16:02,453 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:16:02,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:16:02,454 INFO L82 PathProgramCache]: Analyzing trace with hash -200449353, now seen corresponding path program 1 times [2020-10-28 00:16:02,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:16:02,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808947478] [2020-10-28 00:16:02,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:16:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:02,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:02,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:02,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 00:16:02,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:16:02,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-28 00:16:02,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:02,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:16:02,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:16:02,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 00:16:02,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:02,882 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:16:02,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:16:02,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:02,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:02,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:02,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:16:02,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:16:02,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:16:02,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:02,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:16:02,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:16:02,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:16:02,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:02,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:16:02,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808947478] [2020-10-28 00:16:02,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:16:02,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:16:02,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178075981] [2020-10-28 00:16:02,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:16:02,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:16:02,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:16:02,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:16:02,922 INFO L87 Difference]: Start difference. First operand 15882 states and 23817 transitions. Second operand 4 states. [2020-10-28 00:16:03,263 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-28 00:16:05,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:16:05,355 INFO L93 Difference]: Finished difference Result 39042 states and 58575 transitions. [2020-10-28 00:16:05,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:16:05,357 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-10-28 00:16:05,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:16:05,427 INFO L225 Difference]: With dead ends: 39042 [2020-10-28 00:16:05,427 INFO L226 Difference]: Without dead ends: 23199 [2020-10-28 00:16:05,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:16:05,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23199 states. [2020-10-28 00:16:07,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23199 to 23196. [2020-10-28 00:16:07,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23196 states. [2020-10-28 00:16:07,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23196 states to 23196 states and 34651 transitions. [2020-10-28 00:16:07,343 INFO L78 Accepts]: Start accepts. Automaton has 23196 states and 34651 transitions. Word has length 74 [2020-10-28 00:16:07,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:16:07,343 INFO L481 AbstractCegarLoop]: Abstraction has 23196 states and 34651 transitions. [2020-10-28 00:16:07,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:16:07,343 INFO L276 IsEmpty]: Start isEmpty. Operand 23196 states and 34651 transitions. [2020-10-28 00:16:07,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 00:16:07,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:16:07,357 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:16:07,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:16:07,358 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:16:07,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:16:07,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1804316187, now seen corresponding path program 1 times [2020-10-28 00:16:07,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:16:07,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263080891] [2020-10-28 00:16:07,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:16:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:07,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:07,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:08,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:09,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:09,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 00:16:09,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 00:16:09,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1685 [2020-10-28 00:16:09,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:09,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:16:09,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:16:09,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-28 00:16:09,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:09,473 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:16:09,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:16:09,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:09,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:09,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:09,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:16:09,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:16:09,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 00:16:09,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:09,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:16:09,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:16:09,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:16:09,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:09,546 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 00:16:09,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263080891] [2020-10-28 00:16:09,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:16:09,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 00:16:09,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80249076] [2020-10-28 00:16:09,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:16:09,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:16:09,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:16:09,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:16:09,549 INFO L87 Difference]: Start difference. First operand 23196 states and 34651 transitions. Second operand 5 states. [2020-10-28 00:16:09,990 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-28 00:16:11,522 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-28 00:16:13,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:16:13,562 INFO L93 Difference]: Finished difference Result 54181 states and 81121 transitions. [2020-10-28 00:16:13,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:16:13,562 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2020-10-28 00:16:13,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:16:13,641 INFO L225 Difference]: With dead ends: 54181 [2020-10-28 00:16:13,641 INFO L226 Difference]: Without dead ends: 38338 [2020-10-28 00:16:13,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:16:13,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38338 states. [2020-10-28 00:16:16,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38338 to 38332. [2020-10-28 00:16:16,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38332 states. [2020-10-28 00:16:16,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38332 states to 38332 states and 57019 transitions. [2020-10-28 00:16:16,611 INFO L78 Accepts]: Start accepts. Automaton has 38332 states and 57019 transitions. Word has length 99 [2020-10-28 00:16:16,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:16:16,611 INFO L481 AbstractCegarLoop]: Abstraction has 38332 states and 57019 transitions. [2020-10-28 00:16:16,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:16:16,611 INFO L276 IsEmpty]: Start isEmpty. Operand 38332 states and 57019 transitions. [2020-10-28 00:16:16,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-28 00:16:16,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:16:16,626 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:16:16,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:16:16,627 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:16:16,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:16:16,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1885723984, now seen corresponding path program 1 times [2020-10-28 00:16:16,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:16:16,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798175003] [2020-10-28 00:16:16,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:16:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:16,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:16,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:16,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:16,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:17,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:17,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:17,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:21,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:21,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 00:16:21,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:16:21,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:16:21,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:21,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:16:21,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:16:21,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 00:16:21,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:21,965 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:16:21,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:16:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:21,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:21,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:21,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:16:21,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:16:21,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:16:21,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:21,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:16:21,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:16:21,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:16:21,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:22,018 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:16:22,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798175003] [2020-10-28 00:16:22,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:16:22,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:16:22,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560911201] [2020-10-28 00:16:22,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:16:22,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:16:22,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:16:22,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:16:22,021 INFO L87 Difference]: Start difference. First operand 38332 states and 57019 transitions. Second operand 6 states. [2020-10-28 00:16:23,717 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-28 00:16:24,238 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 00:16:27,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:16:27,853 INFO L93 Difference]: Finished difference Result 98516 states and 145045 transitions. [2020-10-28 00:16:27,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:16:27,854 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 100 [2020-10-28 00:16:27,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:16:27,955 INFO L225 Difference]: With dead ends: 98516 [2020-10-28 00:16:27,956 INFO L226 Difference]: Without dead ends: 60225 [2020-10-28 00:16:28,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:16:28,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60225 states. [2020-10-28 00:16:31,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60225 to 39580. [2020-10-28 00:16:31,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39580 states. [2020-10-28 00:16:31,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39580 states to 39580 states and 57671 transitions. [2020-10-28 00:16:31,540 INFO L78 Accepts]: Start accepts. Automaton has 39580 states and 57671 transitions. Word has length 100 [2020-10-28 00:16:31,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:16:31,540 INFO L481 AbstractCegarLoop]: Abstraction has 39580 states and 57671 transitions. [2020-10-28 00:16:31,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:16:31,540 INFO L276 IsEmpty]: Start isEmpty. Operand 39580 states and 57671 transitions. [2020-10-28 00:16:31,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-28 00:16:31,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:16:31,553 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:16:31,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:16:31,553 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:16:31,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:16:31,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1661418736, now seen corresponding path program 1 times [2020-10-28 00:16:31,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:16:31,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172480171] [2020-10-28 00:16:31,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:16:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:31,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:31,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:31,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:31,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:32,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:33,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:36,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:36,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:36,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 00:16:36,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:16:36,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 00:16:36,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:36,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:16:36,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-28 00:16:36,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:16:36,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:36,871 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:16:36,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:16:36,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:36,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:36,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:36,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:16:36,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:16:36,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:16:36,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:36,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:16:36,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:16:36,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:16:36,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:36,918 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:16:36,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172480171] [2020-10-28 00:16:36,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:16:36,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:16:36,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682026452] [2020-10-28 00:16:36,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:16:36,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:16:36,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:16:36,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:16:36,921 INFO L87 Difference]: Start difference. First operand 39580 states and 57671 transitions. Second operand 4 states. [2020-10-28 00:16:37,307 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 00:16:42,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:16:42,097 INFO L93 Difference]: Finished difference Result 85301 states and 124517 transitions. [2020-10-28 00:16:42,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:16:42,098 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2020-10-28 00:16:42,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:16:42,185 INFO L225 Difference]: With dead ends: 85301 [2020-10-28 00:16:42,185 INFO L226 Difference]: Without dead ends: 59682 [2020-10-28 00:16:42,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:16:42,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59682 states. [2020-10-28 00:16:46,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59682 to 56327. [2020-10-28 00:16:46,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56327 states. [2020-10-28 00:16:46,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56327 states to 56327 states and 81481 transitions. [2020-10-28 00:16:46,878 INFO L78 Accepts]: Start accepts. Automaton has 56327 states and 81481 transitions. Word has length 100 [2020-10-28 00:16:46,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:16:46,878 INFO L481 AbstractCegarLoop]: Abstraction has 56327 states and 81481 transitions. [2020-10-28 00:16:46,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:16:46,878 INFO L276 IsEmpty]: Start isEmpty. Operand 56327 states and 81481 transitions. [2020-10-28 00:16:46,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-28 00:16:46,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:16:46,893 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:16:46,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:16:46,893 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:16:46,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:16:46,893 INFO L82 PathProgramCache]: Analyzing trace with hash -248754799, now seen corresponding path program 1 times [2020-10-28 00:16:46,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:16:46,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931510904] [2020-10-28 00:16:46,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:16:46,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:46,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:46,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:47,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:47,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:47,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:48,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:50,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:51,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:51,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 00:16:51,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:16:51,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 00:16:51,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:51,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:16:51,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-28 00:16:51,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 00:16:51,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:52,303 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:16:52,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:16:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:52,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:52,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:52,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:16:52,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:16:52,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:16:52,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:52,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:16:52,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:16:52,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:16:52,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:52,347 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:16:52,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931510904] [2020-10-28 00:16:52,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:16:52,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:16:52,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98614225] [2020-10-28 00:16:52,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:16:52,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:16:52,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:16:52,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:16:52,349 INFO L87 Difference]: Start difference. First operand 56327 states and 81481 transitions. Second operand 4 states. [2020-10-28 00:16:52,639 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 00:16:58,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:16:58,601 INFO L93 Difference]: Finished difference Result 110236 states and 159399 transitions. [2020-10-28 00:16:58,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:16:58,602 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2020-10-28 00:16:58,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:16:58,734 INFO L225 Difference]: With dead ends: 110236 [2020-10-28 00:16:58,735 INFO L226 Difference]: Without dead ends: 77209 [2020-10-28 00:16:58,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:16:59,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77209 states. [2020-10-28 00:17:04,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77209 to 74102. [2020-10-28 00:17:04,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74102 states. [2020-10-28 00:17:04,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74102 states to 74102 states and 106059 transitions. [2020-10-28 00:17:04,772 INFO L78 Accepts]: Start accepts. Automaton has 74102 states and 106059 transitions. Word has length 100 [2020-10-28 00:17:04,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:17:04,772 INFO L481 AbstractCegarLoop]: Abstraction has 74102 states and 106059 transitions. [2020-10-28 00:17:04,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:17:04,772 INFO L276 IsEmpty]: Start isEmpty. Operand 74102 states and 106059 transitions. [2020-10-28 00:17:04,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-28 00:17:04,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:17:04,791 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:17:04,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:17:04,791 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:17:04,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:17:04,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1839203624, now seen corresponding path program 1 times [2020-10-28 00:17:04,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:17:04,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998817871] [2020-10-28 00:17:04,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:17:04,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:17:04,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:04,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:04,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:04,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:07,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:07,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:08,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:09,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:17:09,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 00:17:09,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:17:09,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:17:09,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:17:09,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:17:09,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-28 00:17:09,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 00:17:09,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:17:10,115 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:17:10,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:17:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:17:10,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:10,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:17:10,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:17:10,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:17:10,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:17:10,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:17:10,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:17:10,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:17:10,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:17:10,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:17:10,159 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:17:10,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998817871] [2020-10-28 00:17:10,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:17:10,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:17:10,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600253498] [2020-10-28 00:17:10,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:17:10,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:17:10,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:17:10,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:17:10,161 INFO L87 Difference]: Start difference. First operand 74102 states and 106059 transitions. Second operand 4 states. [2020-10-28 00:17:10,446 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 00:17:16,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:17:16,995 INFO L93 Difference]: Finished difference Result 115280 states and 164833 transitions. [2020-10-28 00:17:16,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:17:16,996 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2020-10-28 00:17:16,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:17:17,114 INFO L225 Difference]: With dead ends: 115280 [2020-10-28 00:17:17,114 INFO L226 Difference]: Without dead ends: 76765 [2020-10-28 00:17:17,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:17:17,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76765 states. [2020-10-28 00:17:22,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76765 to 74617. [2020-10-28 00:17:22,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74617 states. [2020-10-28 00:17:23,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74617 states to 74617 states and 105435 transitions. [2020-10-28 00:17:23,135 INFO L78 Accepts]: Start accepts. Automaton has 74617 states and 105435 transitions. Word has length 100 [2020-10-28 00:17:23,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:17:23,135 INFO L481 AbstractCegarLoop]: Abstraction has 74617 states and 105435 transitions. [2020-10-28 00:17:23,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:17:23,135 INFO L276 IsEmpty]: Start isEmpty. Operand 74617 states and 105435 transitions. [2020-10-28 00:17:23,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-28 00:17:23,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:17:23,148 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:17:23,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:17:23,148 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:17:23,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:17:23,149 INFO L82 PathProgramCache]: Analyzing trace with hash 288501669, now seen corresponding path program 1 times [2020-10-28 00:17:23,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:17:23,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466688183] [2020-10-28 00:17:23,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:17:23,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:17:23,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:23,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:23,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:25,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:17:25,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 00:17:25,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 00:17:25,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2127 [2020-10-28 00:17:25,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:17:25,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:17:25,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-28 00:17:25,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 00:17:25,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:17:25,589 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:17:25,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:17:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:17:25,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:25,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:17:25,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:17:25,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:17:25,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:17:25,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:17:25,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:17:25,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:17:25,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:17:25,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:17:25,618 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:17:25,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466688183] [2020-10-28 00:17:25,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:17:25,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:17:25,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899024946] [2020-10-28 00:17:25,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:17:25,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:17:25,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:17:25,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:17:25,621 INFO L87 Difference]: Start difference. First operand 74617 states and 105435 transitions. Second operand 4 states. [2020-10-28 00:17:25,923 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 00:17:36,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:17:36,244 INFO L93 Difference]: Finished difference Result 197665 states and 278832 transitions. [2020-10-28 00:17:36,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:17:36,245 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2020-10-28 00:17:36,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:17:36,421 INFO L225 Difference]: With dead ends: 197665 [2020-10-28 00:17:36,422 INFO L226 Difference]: Without dead ends: 129046 [2020-10-28 00:17:36,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:17:36,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129046 states. [2020-10-28 00:17:46,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129046 to 127868. [2020-10-28 00:17:46,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127868 states. [2020-10-28 00:17:46,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127868 states to 127868 states and 178568 transitions. [2020-10-28 00:17:46,968 INFO L78 Accepts]: Start accepts. Automaton has 127868 states and 178568 transitions. Word has length 100 [2020-10-28 00:17:46,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:17:46,968 INFO L481 AbstractCegarLoop]: Abstraction has 127868 states and 178568 transitions. [2020-10-28 00:17:46,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:17:46,968 INFO L276 IsEmpty]: Start isEmpty. Operand 127868 states and 178568 transitions. [2020-10-28 00:17:46,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-28 00:17:46,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:17:46,987 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:17:46,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 00:17:46,987 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:17:46,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:17:46,988 INFO L82 PathProgramCache]: Analyzing trace with hash 836320302, now seen corresponding path program 1 times [2020-10-28 00:17:46,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:17:46,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361710048] [2020-10-28 00:17:46,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:17:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:17:47,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:47,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:47,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:47,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:47,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:51,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:17:51,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 00:17:51,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:17:51,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4151 [2020-10-28 00:17:51,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:17:51,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:17:51,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:17:51,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 00:17:51,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:17:51,476 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:17:51,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:17:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:17:51,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:51,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:17:51,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:17:51,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:17:51,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:17:51,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:17:51,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:17:51,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:17:51,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:17:51,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:17:51,510 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:17:51,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361710048] [2020-10-28 00:17:51,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:17:51,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:17:51,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321430584] [2020-10-28 00:17:51,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:17:51,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:17:51,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:17:51,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:17:51,512 INFO L87 Difference]: Start difference. First operand 127868 states and 178568 transitions. Second operand 6 states. [2020-10-28 00:17:54,802 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-28 00:17:55,974 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 00:18:25,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:18:25,275 INFO L93 Difference]: Finished difference Result 509905 states and 709170 transitions. [2020-10-28 00:18:25,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:18:25,277 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 100 [2020-10-28 00:18:25,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:18:25,939 INFO L225 Difference]: With dead ends: 509905 [2020-10-28 00:18:25,939 INFO L226 Difference]: Without dead ends: 381942 [2020-10-28 00:18:26,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:18:26,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381942 states. [2020-10-28 00:18:43,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381942 to 178939. [2020-10-28 00:18:43,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178939 states. [2020-10-28 00:18:44,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178939 states to 178939 states and 244717 transitions. [2020-10-28 00:18:44,046 INFO L78 Accepts]: Start accepts. Automaton has 178939 states and 244717 transitions. Word has length 100 [2020-10-28 00:18:44,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:18:44,051 INFO L481 AbstractCegarLoop]: Abstraction has 178939 states and 244717 transitions. [2020-10-28 00:18:44,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:18:44,051 INFO L276 IsEmpty]: Start isEmpty. Operand 178939 states and 244717 transitions. [2020-10-28 00:18:44,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-28 00:18:44,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:18:44,080 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:18:44,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 00:18:44,080 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:18:44,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:18:44,081 INFO L82 PathProgramCache]: Analyzing trace with hash 948698539, now seen corresponding path program 1 times [2020-10-28 00:18:44,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:18:44,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506092629] [2020-10-28 00:18:44,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:18:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:44,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:44,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:44,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:44,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:44,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:47,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:47,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 00:18:47,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:18:47,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3651 [2020-10-28 00:18:47,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:47,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:18:47,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:18:47,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 00:18:47,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:48,085 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:18:48,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:18:48,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:48,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:48,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:48,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:18:48,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:18:48,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:18:48,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:48,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:18:48,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:18:48,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:18:48,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:48,119 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:18:48,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506092629] [2020-10-28 00:18:48,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:18:48,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:18:48,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445461102] [2020-10-28 00:18:48,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:18:48,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:18:48,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:18:48,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:18:48,121 INFO L87 Difference]: Start difference. First operand 178939 states and 244717 transitions. Second operand 6 states. [2020-10-28 00:18:51,780 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-28 00:18:53,688 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 176