/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:19:37,696 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:19:37,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:19:37,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:19:37,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:19:37,736 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:19:37,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:19:37,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:19:37,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:19:37,747 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:19:37,748 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:19:37,750 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:19:37,750 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:19:37,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:19:37,755 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:19:37,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:19:37,760 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:19:37,765 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:19:37,769 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:19:37,773 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:19:37,779 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:19:37,782 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:19:37,784 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:19:37,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:19:37,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:19:37,811 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:19:37,812 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:19:37,815 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:19:37,815 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:19:37,817 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:19:37,817 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:19:37,819 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:19:37,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:19:37,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:19:37,823 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:19:37,824 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:19:37,824 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:19:37,825 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:19:37,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:19:37,826 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:19:37,827 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:19:37,828 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 05:19:37,884 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:19:37,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:19:37,889 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:19:37,890 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:19:37,890 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:19:37,890 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:19:37,890 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:19:37,891 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:19:37,891 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:19:37,891 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:19:37,892 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:19:37,892 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:19:37,893 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:19:37,893 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:19:37,893 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:19:37,893 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:19:37,893 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:19:37,894 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:19:37,894 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:19:37,894 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:19:37,894 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:19:37,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:19:37,895 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:19:37,895 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:19:37,895 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:19:37,895 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:19:37,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:19:37,896 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:19:37,896 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:19:37,896 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:19:38,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:19:38,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:19:38,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:19:38,353 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:19:38,354 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:19:38,357 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 05:19:38,451 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/da283f3e0/9d7fabb2753d40f2a355dcbd8711abbe/FLAG69eea1769 [2020-10-27 05:19:39,153 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:19:39,153 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 05:19:39,180 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/da283f3e0/9d7fabb2753d40f2a355dcbd8711abbe/FLAG69eea1769 [2020-10-27 05:19:39,416 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/da283f3e0/9d7fabb2753d40f2a355dcbd8711abbe [2020-10-27 05:19:39,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:19:39,430 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:19:39,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:19:39,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:19:39,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:19:39,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:19:39" (1/1) ... [2020-10-27 05:19:39,445 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dc1608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:39, skipping insertion in model container [2020-10-27 05:19:39,445 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:19:39" (1/1) ... [2020-10-27 05:19:39,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:19:39,542 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:19:39,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:19:39,981 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:19:40,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:19:40,143 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:19:40,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:40 WrapperNode [2020-10-27 05:19:40,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:19:40,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:19:40,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:19:40,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:19:40,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:40" (1/1) ... [2020-10-27 05:19:40,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:40" (1/1) ... [2020-10-27 05:19:40,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:40" (1/1) ... [2020-10-27 05:19:40,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:40" (1/1) ... [2020-10-27 05:19:40,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:40" (1/1) ... [2020-10-27 05:19:40,208 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:40" (1/1) ... [2020-10-27 05:19:40,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:40" (1/1) ... [2020-10-27 05:19:40,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:19:40,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:19:40,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:19:40,222 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:19:40,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:19:40,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:19:40,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:19:40,315 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:19:40,315 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:19:40,315 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:19:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:19:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:19:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:19:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:19:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:19:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:19:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:19:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:19:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:19:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:19:40,332 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:19:40,333 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:19:40,334 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:19:40,334 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:19:40,334 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:19:40,334 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 05:19:40,334 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:19:40,334 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:19:40,334 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:19:40,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:19:40,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:19:40,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:19:40,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:19:40,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:19:40,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:19:41,337 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:19:41,337 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:19:41,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:19:41 BoogieIcfgContainer [2020-10-27 05:19:41,341 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:19:41,344 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:19:41,345 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:19:41,349 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:19:41,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:19:39" (1/3) ... [2020-10-27 05:19:41,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74c192f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:19:41, skipping insertion in model container [2020-10-27 05:19:41,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:40" (2/3) ... [2020-10-27 05:19:41,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74c192f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:19:41, skipping insertion in model container [2020-10-27 05:19:41,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:19:41" (3/3) ... [2020-10-27 05:19:41,353 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 05:19:41,366 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:19:41,372 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:19:41,386 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:19:41,428 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:19:41,429 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:19:41,429 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:19:41,429 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:19:41,429 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:19:41,429 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:19:41,429 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:19:41,429 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:19:41,452 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2020-10-27 05:19:41,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 05:19:41,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:19:41,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:19:41,464 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:19:41,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:19:41,471 INFO L82 PathProgramCache]: Analyzing trace with hash 407883934, now seen corresponding path program 1 times [2020-10-27 05:19:41,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:19:41,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792674521] [2020-10-27 05:19:41,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:19:41,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:42,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:42,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:42,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:42,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:42,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:42,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:42,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:43,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:43,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:46,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:46,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:46,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:46,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:46,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 05:19:46,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:19:46,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-27 05:19:46,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:46,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:19:46,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:19:46,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 05:19:46,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:19:47,363 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 05:19:47,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:19:47,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:47,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:47,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:47,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:19:47,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:19:47,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 05:19:47,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:47,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:19:47,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:19:47,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:19:47,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:47,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:19:47,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792674521] [2020-10-27 05:19:47,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:19:47,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:19:47,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501049653] [2020-10-27 05:19:47,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:19:47,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:19:47,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:19:47,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:19:47,525 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 6 states. [2020-10-27 05:19:47,892 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:19:48,776 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:19:49,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:19:49,101 INFO L93 Difference]: Finished difference Result 326 states and 533 transitions. [2020-10-27 05:19:49,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:19:49,102 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-10-27 05:19:49,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:19:49,116 INFO L225 Difference]: With dead ends: 326 [2020-10-27 05:19:49,116 INFO L226 Difference]: Without dead ends: 213 [2020-10-27 05:19:49,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:19:49,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-27 05:19:49,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 210. [2020-10-27 05:19:49,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-27 05:19:49,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 300 transitions. [2020-10-27 05:19:49,189 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 300 transitions. Word has length 80 [2020-10-27 05:19:49,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:19:49,190 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 300 transitions. [2020-10-27 05:19:49,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:19:49,190 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 300 transitions. [2020-10-27 05:19:49,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:19:49,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:19:49,194 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:19:49,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:19:49,194 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:19:49,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:19:49,195 INFO L82 PathProgramCache]: Analyzing trace with hash 562399174, now seen corresponding path program 1 times [2020-10-27 05:19:49,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:19:49,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472422953] [2020-10-27 05:19:49,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:19:49,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:49,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:49,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:49,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:49,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:49,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:49,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:49,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:50,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:50,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:50,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:50,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:50,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:51,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:54,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:54,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:19:54,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:19:54,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:19:54,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:54,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:19:54,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:19:54,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:19:54,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:54,556 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 05:19:54,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:19:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:54,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:54,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:54,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:19:54,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:19:54,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 05:19:54,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:54,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:19:54,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:19:54,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:19:54,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:54,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:19:54,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472422953] [2020-10-27 05:19:54,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:19:54,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:19:54,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475172084] [2020-10-27 05:19:54,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:19:54,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:19:54,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:19:54,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:19:54,632 INFO L87 Difference]: Start difference. First operand 210 states and 300 transitions. Second operand 6 states. [2020-10-27 05:19:54,951 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:19:55,646 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:19:56,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:19:56,059 INFO L93 Difference]: Finished difference Result 501 states and 753 transitions. [2020-10-27 05:19:56,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:19:56,064 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-27 05:19:56,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:19:56,072 INFO L225 Difference]: With dead ends: 501 [2020-10-27 05:19:56,073 INFO L226 Difference]: Without dead ends: 340 [2020-10-27 05:19:56,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:19:56,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-27 05:19:56,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 337. [2020-10-27 05:19:56,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-10-27 05:19:56,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 500 transitions. [2020-10-27 05:19:56,141 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 500 transitions. Word has length 81 [2020-10-27 05:19:56,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:19:56,142 INFO L481 AbstractCegarLoop]: Abstraction has 337 states and 500 transitions. [2020-10-27 05:19:56,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:19:56,144 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 500 transitions. [2020-10-27 05:19:56,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:19:56,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:19:56,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:19:56,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:19:56,149 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:19:56,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:19:56,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1756201090, now seen corresponding path program 1 times [2020-10-27 05:19:56,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:19:56,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293862012] [2020-10-27 05:19:56,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:19:56,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:56,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:56,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:56,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:56,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:56,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:57,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:57,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:57,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:58,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:59,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:59,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:59,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:01,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:01,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:20:01,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:20:01,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 05:20:01,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:01,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:20:01,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:20:01,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:20:01,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:01,508 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 05:20:01,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:01,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:01,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:01,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:01,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:01,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 05:20:01,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:01,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:20:01,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:01,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:20:01,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:01,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:20:01,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293862012] [2020-10-27 05:20:01,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:01,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:20:01,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121493186] [2020-10-27 05:20:01,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:20:01,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:01,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:20:01,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:20:01,568 INFO L87 Difference]: Start difference. First operand 337 states and 500 transitions. Second operand 6 states. [2020-10-27 05:20:01,835 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:20:02,498 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:20:02,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:20:02,856 INFO L93 Difference]: Finished difference Result 866 states and 1330 transitions. [2020-10-27 05:20:02,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:20:02,858 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-27 05:20:02,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:20:02,863 INFO L225 Difference]: With dead ends: 866 [2020-10-27 05:20:02,864 INFO L226 Difference]: Without dead ends: 582 [2020-10-27 05:20:02,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:20:02,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2020-10-27 05:20:02,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 579. [2020-10-27 05:20:02,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 579 states. [2020-10-27 05:20:02,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 879 transitions. [2020-10-27 05:20:02,944 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 879 transitions. Word has length 82 [2020-10-27 05:20:02,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:20:02,944 INFO L481 AbstractCegarLoop]: Abstraction has 579 states and 879 transitions. [2020-10-27 05:20:02,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:20:02,945 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 879 transitions. [2020-10-27 05:20:02,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 05:20:02,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:20:02,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:20:02,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:20:02,947 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:20:02,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:20:02,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1860506487, now seen corresponding path program 1 times [2020-10-27 05:20:02,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:20:02,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834263788] [2020-10-27 05:20:02,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:20:02,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:03,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:03,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:03,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:03,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:03,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:03,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:04,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:04,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:07,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:07,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 05:20:07,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:20:07,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:20:07,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:07,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:20:07,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:20:07,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 05:20:07,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:08,310 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 05:20:08,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:08,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:08,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:08,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:08,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:08,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:08,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 05:20:08,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:08,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:20:08,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:08,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:20:08,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:08,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:20:08,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834263788] [2020-10-27 05:20:08,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:08,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:20:08,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345082389] [2020-10-27 05:20:08,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:20:08,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:08,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:20:08,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:20:08,376 INFO L87 Difference]: Start difference. First operand 579 states and 879 transitions. Second operand 6 states. [2020-10-27 05:20:08,692 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:20:09,444 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 05:20:09,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:20:09,836 INFO L93 Difference]: Finished difference Result 1628 states and 2522 transitions. [2020-10-27 05:20:09,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:20:09,837 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-27 05:20:09,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:20:09,845 INFO L225 Difference]: With dead ends: 1628 [2020-10-27 05:20:09,845 INFO L226 Difference]: Without dead ends: 1090 [2020-10-27 05:20:09,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:20:09,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2020-10-27 05:20:09,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 1087. [2020-10-27 05:20:09,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1087 states. [2020-10-27 05:20:09,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1674 transitions. [2020-10-27 05:20:09,926 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1674 transitions. Word has length 83 [2020-10-27 05:20:09,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:20:09,927 INFO L481 AbstractCegarLoop]: Abstraction has 1087 states and 1674 transitions. [2020-10-27 05:20:09,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:20:09,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1674 transitions. [2020-10-27 05:20:09,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 05:20:09,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:20:09,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:20:09,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:20:09,940 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:20:09,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:20:09,941 INFO L82 PathProgramCache]: Analyzing trace with hash -546879729, now seen corresponding path program 1 times [2020-10-27 05:20:09,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:20:09,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874817690] [2020-10-27 05:20:09,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:20:09,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:10,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:10,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:10,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:10,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:10,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:10,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:11,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:11,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:11,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:12,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:12,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:14,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:14,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 05:20:14,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:20:14,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:20:14,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:14,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:20:14,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:20:14,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 05:20:14,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:15,401 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 05:20:15,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:15,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:15,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:15,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:15,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:15,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 05:20:15,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:15,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:20:15,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:15,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:20:15,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 05:20:15,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:20:15,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874817690] [2020-10-27 05:20:15,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:15,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:20:15,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032828674] [2020-10-27 05:20:15,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:20:15,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:15,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:20:15,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:20:15,498 INFO L87 Difference]: Start difference. First operand 1087 states and 1674 transitions. Second operand 6 states. [2020-10-27 05:20:15,790 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:20:16,438 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:20:16,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:20:16,900 INFO L93 Difference]: Finished difference Result 3122 states and 4856 transitions. [2020-10-27 05:20:16,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:20:16,901 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2020-10-27 05:20:16,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:20:16,914 INFO L225 Difference]: With dead ends: 3122 [2020-10-27 05:20:16,914 INFO L226 Difference]: Without dead ends: 2080 [2020-10-27 05:20:16,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:20:16,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2020-10-27 05:20:17,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 2077. [2020-10-27 05:20:17,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2077 states. [2020-10-27 05:20:17,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 3209 transitions. [2020-10-27 05:20:17,089 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 3209 transitions. Word has length 84 [2020-10-27 05:20:17,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:20:17,090 INFO L481 AbstractCegarLoop]: Abstraction has 2077 states and 3209 transitions. [2020-10-27 05:20:17,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:20:17,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 3209 transitions. [2020-10-27 05:20:17,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 05:20:17,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:20:17,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:20:17,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:20:17,093 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:20:17,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:20:17,094 INFO L82 PathProgramCache]: Analyzing trace with hash 175807272, now seen corresponding path program 1 times [2020-10-27 05:20:17,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:20:17,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697277406] [2020-10-27 05:20:17,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:20:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:17,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:17,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:17,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:17,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:17,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:19,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:19,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:19,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:20,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:20,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:20,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:20,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:20,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:21,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:21,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:21,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:22,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:22,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 05:20:22,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 05:20:22,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 05:20:22,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:22,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:20:22,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:20:22,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 05:20:22,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:22,513 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 05:20:22,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:22,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:22,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:22,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:22,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:22,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:22,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:20:22,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:22,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:20:22,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:22,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:20:22,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:22,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:20:22,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697277406] [2020-10-27 05:20:22,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:22,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:20:22,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039948101] [2020-10-27 05:20:22,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:20:22,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:22,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:20:22,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:20:22,589 INFO L87 Difference]: Start difference. First operand 2077 states and 3209 transitions. Second operand 11 states. [2020-10-27 05:20:22,923 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:20:23,935 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:20:24,201 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:20:25,262 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:20:25,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:20:25,344 INFO L93 Difference]: Finished difference Result 5991 states and 9287 transitions. [2020-10-27 05:20:25,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 05:20:25,345 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 85 [2020-10-27 05:20:25,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:20:25,366 INFO L225 Difference]: With dead ends: 5991 [2020-10-27 05:20:25,366 INFO L226 Difference]: Without dead ends: 4078 [2020-10-27 05:20:25,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2020-10-27 05:20:25,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4078 states. [2020-10-27 05:20:25,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4078 to 2077. [2020-10-27 05:20:25,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2077 states. [2020-10-27 05:20:25,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 3207 transitions. [2020-10-27 05:20:25,589 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 3207 transitions. Word has length 85 [2020-10-27 05:20:25,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:20:25,590 INFO L481 AbstractCegarLoop]: Abstraction has 2077 states and 3207 transitions. [2020-10-27 05:20:25,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:20:25,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 3207 transitions. [2020-10-27 05:20:25,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 05:20:25,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:20:25,592 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:20:25,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:20:25,592 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:20:25,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:20:25,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1863777399, now seen corresponding path program 1 times [2020-10-27 05:20:25,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:20:25,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606043555] [2020-10-27 05:20:25,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:20:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:25,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:25,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:25,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:25,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:25,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:26,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:26,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:26,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:26,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:26,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:27,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:27,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:30,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:30,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 05:20:30,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:20:30,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 05:20:30,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:30,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:20:30,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:20:30,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 05:20:30,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:31,057 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 05:20:31,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:31,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:31,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:31,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:31,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:31,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 05:20:31,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:31,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:20:31,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:31,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:20:31,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:31,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:20:31,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606043555] [2020-10-27 05:20:31,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:31,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:20:31,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571268717] [2020-10-27 05:20:31,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:20:31,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:31,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:20:31,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:20:31,145 INFO L87 Difference]: Start difference. First operand 2077 states and 3207 transitions. Second operand 11 states. [2020-10-27 05:20:31,459 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:20:32,567 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:20:32,872 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:20:34,365 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 170 [2020-10-27 05:20:34,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:20:34,657 INFO L93 Difference]: Finished difference Result 6726 states and 10477 transitions. [2020-10-27 05:20:34,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 05:20:34,657 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 86 [2020-10-27 05:20:34,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:20:34,684 INFO L225 Difference]: With dead ends: 6726 [2020-10-27 05:20:34,684 INFO L226 Difference]: Without dead ends: 4843 [2020-10-27 05:20:34,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-10-27 05:20:34,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4843 states. [2020-10-27 05:20:34,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4843 to 2077. [2020-10-27 05:20:34,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2077 states. [2020-10-27 05:20:34,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 3199 transitions. [2020-10-27 05:20:34,966 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 3199 transitions. Word has length 86 [2020-10-27 05:20:34,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:20:34,966 INFO L481 AbstractCegarLoop]: Abstraction has 2077 states and 3199 transitions. [2020-10-27 05:20:34,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:20:34,966 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 3199 transitions. [2020-10-27 05:20:34,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 05:20:34,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:20:34,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:20:34,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:20:34,969 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:20:34,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:20:34,969 INFO L82 PathProgramCache]: Analyzing trace with hash 761822728, now seen corresponding path program 1 times [2020-10-27 05:20:34,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:20:34,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920390276] [2020-10-27 05:20:34,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:20:34,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:35,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:35,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:35,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:35,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:35,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:36,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:36,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:37,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:38,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:39,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:40,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:40,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 05:20:40,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:20:40,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 05:20:40,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:40,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:20:40,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:20:40,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 05:20:40,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:40,427 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 05:20:40,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:40,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:40,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:40,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:40,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:40,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:40,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:20:40,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:40,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:20:40,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:40,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:20:40,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:40,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:20:40,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920390276] [2020-10-27 05:20:40,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:40,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:20:40,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122857768] [2020-10-27 05:20:40,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:20:40,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:40,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:20:40,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:20:40,510 INFO L87 Difference]: Start difference. First operand 2077 states and 3199 transitions. Second operand 11 states. [2020-10-27 05:20:40,899 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:20:42,072 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:20:42,376 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:20:43,730 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:20:43,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:20:43,961 INFO L93 Difference]: Finished difference Result 6746 states and 10497 transitions. [2020-10-27 05:20:43,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 05:20:43,962 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 87 [2020-10-27 05:20:43,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:20:43,985 INFO L225 Difference]: With dead ends: 6746 [2020-10-27 05:20:43,986 INFO L226 Difference]: Without dead ends: 4843 [2020-10-27 05:20:43,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2020-10-27 05:20:43,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4843 states. [2020-10-27 05:20:44,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4843 to 2077. [2020-10-27 05:20:44,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2077 states. [2020-10-27 05:20:44,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 3195 transitions. [2020-10-27 05:20:44,245 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 3195 transitions. Word has length 87 [2020-10-27 05:20:44,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:20:44,246 INFO L481 AbstractCegarLoop]: Abstraction has 2077 states and 3195 transitions. [2020-10-27 05:20:44,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:20:44,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 3195 transitions. [2020-10-27 05:20:44,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-27 05:20:44,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:20:44,248 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:20:44,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:20:44,248 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:20:44,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:20:44,249 INFO L82 PathProgramCache]: Analyzing trace with hash 655883679, now seen corresponding path program 1 times [2020-10-27 05:20:44,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:20:44,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725919881] [2020-10-27 05:20:44,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:20:44,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:44,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:44,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:44,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:44,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:44,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:45,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:45,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:46,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:46,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:49,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:49,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 05:20:49,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:20:49,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 05:20:49,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:49,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:20:49,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:20:49,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 05:20:49,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:49,694 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 05:20:49,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:49,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:49,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:49,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:49,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:49,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:49,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 05:20:49,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:49,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:20:49,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:49,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:20:49,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:20:49,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725919881] [2020-10-27 05:20:49,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:49,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:20:49,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627065799] [2020-10-27 05:20:49,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:20:49,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:49,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:20:49,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:20:49,757 INFO L87 Difference]: Start difference. First operand 2077 states and 3195 transitions. Second operand 11 states. [2020-10-27 05:20:50,131 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:20:51,204 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:20:51,571 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:20:53,017 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:20:53,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:20:53,378 INFO L93 Difference]: Finished difference Result 6686 states and 10401 transitions. [2020-10-27 05:20:53,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 05:20:53,379 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 88 [2020-10-27 05:20:53,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:20:53,401 INFO L225 Difference]: With dead ends: 6686 [2020-10-27 05:20:53,401 INFO L226 Difference]: Without dead ends: 4843 [2020-10-27 05:20:53,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2020-10-27 05:20:53,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4843 states. [2020-10-27 05:20:53,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4843 to 2077. [2020-10-27 05:20:53,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2077 states. [2020-10-27 05:20:53,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 3179 transitions. [2020-10-27 05:20:53,749 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 3179 transitions. Word has length 88 [2020-10-27 05:20:53,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:20:53,750 INFO L481 AbstractCegarLoop]: Abstraction has 2077 states and 3179 transitions. [2020-10-27 05:20:53,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:20:53,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 3179 transitions. [2020-10-27 05:20:53,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 05:20:53,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:20:53,752 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:20:53,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:20:53,752 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:20:53,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:20:53,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1944736004, now seen corresponding path program 1 times [2020-10-27 05:20:53,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:20:53,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131736477] [2020-10-27 05:20:53,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:20:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:53,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:53,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:53,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:53,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:54,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:56,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:56,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:58,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:58,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 05:20:58,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:20:58,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:20:58,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:58,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:20:58,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:20:58,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 05:20:58,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:59,263 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 05:20:59,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:59,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:59,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:59,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:59,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:59,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:59,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:20:59,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:59,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:20:59,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:59,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:20:59,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:20:59,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131736477] [2020-10-27 05:20:59,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:59,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:20:59,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971874471] [2020-10-27 05:20:59,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:20:59,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:59,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:20:59,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:20:59,342 INFO L87 Difference]: Start difference. First operand 2077 states and 3179 transitions. Second operand 12 states. [2020-10-27 05:20:59,695 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:21:00,983 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:21:01,239 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 05:21:02,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:21:02,535 INFO L93 Difference]: Finished difference Result 6807 states and 10529 transitions. [2020-10-27 05:21:02,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 05:21:02,536 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 89 [2020-10-27 05:21:02,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:21:02,561 INFO L225 Difference]: With dead ends: 6807 [2020-10-27 05:21:02,562 INFO L226 Difference]: Without dead ends: 4972 [2020-10-27 05:21:02,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2020-10-27 05:21:02,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4972 states. [2020-10-27 05:21:02,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4972 to 2144. [2020-10-27 05:21:02,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2144 states. [2020-10-27 05:21:02,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2144 states to 2144 states and 3260 transitions. [2020-10-27 05:21:02,869 INFO L78 Accepts]: Start accepts. Automaton has 2144 states and 3260 transitions. Word has length 89 [2020-10-27 05:21:02,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:21:02,870 INFO L481 AbstractCegarLoop]: Abstraction has 2144 states and 3260 transitions. [2020-10-27 05:21:02,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:21:02,870 INFO L276 IsEmpty]: Start isEmpty. Operand 2144 states and 3260 transitions. [2020-10-27 05:21:02,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 05:21:02,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:21:02,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:21:02,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:21:02,872 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:21:02,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:21:02,873 INFO L82 PathProgramCache]: Analyzing trace with hash -354415278, now seen corresponding path program 1 times [2020-10-27 05:21:02,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:21:02,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797490583] [2020-10-27 05:21:02,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:21:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:02,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:02,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:02,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:03,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:03,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:04,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:04,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:04,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:04,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:05,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:05,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:05,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:07,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:07,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:07,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 05:21:07,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:21:07,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:21:07,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:07,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:21:07,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:21:07,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 05:21:07,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:08,415 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 05:21:08,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:21:08,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:08,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:08,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:08,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:21:08,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:21:08,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 05:21:08,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:08,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:21:08,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:21:08,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:21:08,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:21:08,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797490583] [2020-10-27 05:21:08,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:21:08,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:21:08,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625845161] [2020-10-27 05:21:08,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:21:08,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:21:08,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:21:08,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:21:08,474 INFO L87 Difference]: Start difference. First operand 2144 states and 3260 transitions. Second operand 12 states. [2020-10-27 05:21:09,189 WARN L193 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 179 [2020-10-27 05:21:11,025 WARN L193 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 173 [2020-10-27 05:21:11,305 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:21:12,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:21:12,789 INFO L93 Difference]: Finished difference Result 7768 states and 12010 transitions. [2020-10-27 05:21:12,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 05:21:12,790 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 90 [2020-10-27 05:21:12,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:21:12,804 INFO L225 Difference]: With dead ends: 7768 [2020-10-27 05:21:12,804 INFO L226 Difference]: Without dead ends: 5933 [2020-10-27 05:21:12,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=194, Invalid=562, Unknown=0, NotChecked=0, Total=756 [2020-10-27 05:21:12,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5933 states. [2020-10-27 05:21:13,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5933 to 2152. [2020-10-27 05:21:13,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2152 states. [2020-10-27 05:21:13,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 3268 transitions. [2020-10-27 05:21:13,128 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 3268 transitions. Word has length 90 [2020-10-27 05:21:13,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:21:13,129 INFO L481 AbstractCegarLoop]: Abstraction has 2152 states and 3268 transitions. [2020-10-27 05:21:13,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:21:13,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 3268 transitions. [2020-10-27 05:21:13,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 05:21:13,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:21:13,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:21:13,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:21:13,131 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:21:13,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:21:13,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1163761904, now seen corresponding path program 1 times [2020-10-27 05:21:13,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:21:13,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255225733] [2020-10-27 05:21:13,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:21:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:13,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:13,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:13,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:13,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:13,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:13,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:16,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:16,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 05:21:16,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:21:16,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3787 [2020-10-27 05:21:16,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:16,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 05:21:16,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:21:16,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 05:21:16,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:17,650 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 05:21:17,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:21:17,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:17,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:17,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:17,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:21:17,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:21:17,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:21:17,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:17,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:21:17,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:21:17,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:21:17,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:17,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:21:17,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255225733] [2020-10-27 05:21:17,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:21:17,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-27 05:21:17,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914609661] [2020-10-27 05:21:17,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 05:21:17,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:21:17,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 05:21:17,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:21:17,716 INFO L87 Difference]: Start difference. First operand 2152 states and 3268 transitions. Second operand 15 states. [2020-10-27 05:21:18,510 WARN L193 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 181 [2020-10-27 05:21:19,159 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-10-27 05:21:19,342 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-27 05:21:19,479 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-10-27 05:21:19,647 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-10-27 05:21:19,777 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-27 05:21:21,338 WARN L193 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 174 [2020-10-27 05:21:21,661 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:21:22,396 WARN L193 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 173 [2020-10-27 05:21:25,171 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:21:26,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:21:26,441 INFO L93 Difference]: Finished difference Result 11759 states and 18331 transitions. [2020-10-27 05:21:26,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 05:21:26,442 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 90 [2020-10-27 05:21:26,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:21:26,465 INFO L225 Difference]: With dead ends: 11759 [2020-10-27 05:21:26,465 INFO L226 Difference]: Without dead ends: 9849 [2020-10-27 05:21:26,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=252, Invalid=1008, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 05:21:26,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9849 states. [2020-10-27 05:21:26,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9849 to 2077. [2020-10-27 05:21:26,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2077 states. [2020-10-27 05:21:26,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 3178 transitions. [2020-10-27 05:21:26,909 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 3178 transitions. Word has length 90 [2020-10-27 05:21:26,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:21:26,909 INFO L481 AbstractCegarLoop]: Abstraction has 2077 states and 3178 transitions. [2020-10-27 05:21:26,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 05:21:26,909 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 3178 transitions. [2020-10-27 05:21:26,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 05:21:26,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:21:26,910 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:21:26,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:21:26,911 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:21:26,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:21:26,911 INFO L82 PathProgramCache]: Analyzing trace with hash 684725863, now seen corresponding path program 1 times [2020-10-27 05:21:26,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:21:26,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400757301] [2020-10-27 05:21:26,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:21:26,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:26,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:26,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:27,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:27,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:27,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:31,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:31,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 05:21:31,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:21:31,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 05:21:31,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:31,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 05:21:31,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:21:31,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 05:21:31,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:32,731 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-10-27 05:21:33,054 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2020-10-27 05:21:33,232 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2020-10-27 05:21:33,595 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 49 [2020-10-27 05:21:33,791 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-27 05:21:34,095 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2020-10-27 05:21:34,434 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-10-27 05:21:35,680 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 05:21:35,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:21:35,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:35,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:35,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:35,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:21:35,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:21:35,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:21:35,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:35,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:21:35,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:21:35,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:21:35,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:35,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:21:35,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400757301] [2020-10-27 05:21:35,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:21:35,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-10-27 05:21:35,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298418626] [2020-10-27 05:21:35,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 05:21:35,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:21:35,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 05:21:35,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2020-10-27 05:21:35,783 INFO L87 Difference]: Start difference. First operand 2077 states and 3178 transitions. Second operand 28 states. [2020-10-27 05:21:36,132 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:21:36,999 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-27 05:21:38,214 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-27 05:21:38,604 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-27 05:21:39,126 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 119 [2020-10-27 05:21:39,954 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 148 [2020-10-27 05:21:40,930 WARN L193 SmtUtils]: Spent 857.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 173 [2020-10-27 05:21:42,111 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 205 DAG size of output: 195 [2020-10-27 05:21:42,620 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-27 05:21:42,982 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-27 05:21:43,337 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-10-27 05:21:43,767 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-10-27 05:21:44,546 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-10-27 05:21:45,141 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-10-27 05:21:45,769 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-10-27 05:21:46,360 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-10-27 05:21:50,131 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 05:21:50,575 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:21:51,470 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 05:21:51,906 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:21:52,794 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:21:53,635 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:22:05,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:22:05,272 INFO L93 Difference]: Finished difference Result 15663 states and 24417 transitions. [2020-10-27 05:22:05,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 05:22:05,273 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 90 [2020-10-27 05:22:05,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:22:05,306 INFO L225 Difference]: With dead ends: 15663 [2020-10-27 05:22:05,306 INFO L226 Difference]: Without dead ends: 13820 [2020-10-27 05:22:05,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=577, Invalid=4115, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 05:22:05,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13820 states. [2020-10-27 05:22:05,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13820 to 2152. [2020-10-27 05:22:05,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2152 states. [2020-10-27 05:22:05,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 3267 transitions. [2020-10-27 05:22:05,882 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 3267 transitions. Word has length 90 [2020-10-27 05:22:05,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:22:05,882 INFO L481 AbstractCegarLoop]: Abstraction has 2152 states and 3267 transitions. [2020-10-27 05:22:05,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 05:22:05,882 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 3267 transitions. [2020-10-27 05:22:05,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 05:22:05,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:22:05,884 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:22:05,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:22:05,884 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:22:05,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:22:05,885 INFO L82 PathProgramCache]: Analyzing trace with hash -529586174, now seen corresponding path program 1 times [2020-10-27 05:22:05,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:22:05,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532538370] [2020-10-27 05:22:05,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:22:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:05,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:05,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:06,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:06,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:06,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 05:22:06,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:22:06,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 679 [2020-10-27 05:22:06,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:06,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:22:06,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:22:06,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 05:22:06,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:06,982 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 05:22:06,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:22:06,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:06,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:06,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:06,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:22:06,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:22:06,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:22:06,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:06,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:22:06,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:22:06,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:22:06,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:07,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:22:07,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532538370] [2020-10-27 05:22:07,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:22:07,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:22:07,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096205431] [2020-10-27 05:22:07,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:22:07,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:22:07,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:22:07,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:22:07,018 INFO L87 Difference]: Start difference. First operand 2152 states and 3267 transitions. Second operand 8 states. [2020-10-27 05:22:07,408 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:22:08,638 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 05:22:08,990 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:22:09,351 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:22:09,684 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:22:10,307 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:22:10,697 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:22:11,091 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:22:11,443 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:22:16,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:22:16,167 INFO L93 Difference]: Finished difference Result 20692 states and 32275 transitions. [2020-10-27 05:22:16,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 05:22:16,167 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 91 [2020-10-27 05:22:16,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:22:16,204 INFO L225 Difference]: With dead ends: 20692 [2020-10-27 05:22:16,204 INFO L226 Difference]: Without dead ends: 18865 [2020-10-27 05:22:16,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2020-10-27 05:22:16,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18865 states. [2020-10-27 05:22:17,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18865 to 4116. [2020-10-27 05:22:17,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4116 states. [2020-10-27 05:22:17,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4116 states to 4116 states and 6251 transitions. [2020-10-27 05:22:17,274 INFO L78 Accepts]: Start accepts. Automaton has 4116 states and 6251 transitions. Word has length 91 [2020-10-27 05:22:17,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:22:17,274 INFO L481 AbstractCegarLoop]: Abstraction has 4116 states and 6251 transitions. [2020-10-27 05:22:17,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:22:17,274 INFO L276 IsEmpty]: Start isEmpty. Operand 4116 states and 6251 transitions. [2020-10-27 05:22:17,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 05:22:17,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:22:17,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:22:17,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:22:17,277 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:22:17,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:22:17,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1141021629, now seen corresponding path program 1 times [2020-10-27 05:22:17,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:22:17,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377292137] [2020-10-27 05:22:17,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:22:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:17,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:17,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:17,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:18,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:18,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:19,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:22,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:22,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 05:22:22,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:22:22,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 05:22:22,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:22,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 05:22:22,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:22:22,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 05:22:22,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:23,035 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-10-27 05:22:23,310 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-27 05:22:23,467 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-10-27 05:22:23,692 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2020-10-27 05:22:23,871 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-10-27 05:22:24,101 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-10-27 05:22:24,699 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2020-10-27 05:22:25,838 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 05:22:25,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:22:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:25,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:25,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:25,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:22:25,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:22:25,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:22:25,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:25,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:22:25,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:22:25,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:22:25,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:22:25,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377292137] [2020-10-27 05:22:25,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:22:25,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-10-27 05:22:25,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479415129] [2020-10-27 05:22:25,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 05:22:25,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:22:25,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 05:22:25,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2020-10-27 05:22:25,923 INFO L87 Difference]: Start difference. First operand 4116 states and 6251 transitions. Second operand 28 states. [2020-10-27 05:22:26,490 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 94 [2020-10-27 05:22:28,020 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 236 DAG size of output: 235 [2020-10-27 05:22:28,882 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-27 05:22:29,167 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-27 05:22:29,493 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-10-27 05:22:29,856 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2020-10-27 05:22:30,290 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2020-10-27 05:22:30,946 WARN L193 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 76 [2020-10-27 05:22:31,765 WARN L193 SmtUtils]: Spent 741.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 85 [2020-10-27 05:22:32,690 WARN L193 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 87 [2020-10-27 05:22:37,450 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:22:37,916 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:22:38,427 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:22:39,067 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:22:39,886 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:22:40,622 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:22:52,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:22:52,721 INFO L93 Difference]: Finished difference Result 21692 states and 33434 transitions. [2020-10-27 05:22:52,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 05:22:52,722 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 91 [2020-10-27 05:22:52,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:22:52,752 INFO L225 Difference]: With dead ends: 21692 [2020-10-27 05:22:52,752 INFO L226 Difference]: Without dead ends: 18037 [2020-10-27 05:22:52,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=435, Invalid=2871, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 05:22:52,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18037 states. [2020-10-27 05:22:53,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18037 to 4119. [2020-10-27 05:22:53,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4119 states. [2020-10-27 05:22:53,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4119 states to 4119 states and 6253 transitions. [2020-10-27 05:22:53,907 INFO L78 Accepts]: Start accepts. Automaton has 4119 states and 6253 transitions. Word has length 91 [2020-10-27 05:22:53,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:22:53,908 INFO L481 AbstractCegarLoop]: Abstraction has 4119 states and 6253 transitions. [2020-10-27 05:22:53,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 05:22:53,908 INFO L276 IsEmpty]: Start isEmpty. Operand 4119 states and 6253 transitions. [2020-10-27 05:22:53,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 05:22:53,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:22:53,910 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:22:53,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:22:53,910 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:22:53,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:22:53,911 INFO L82 PathProgramCache]: Analyzing trace with hash -666491960, now seen corresponding path program 1 times [2020-10-27 05:22:53,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:22:53,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338746606] [2020-10-27 05:22:53,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:22:53,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:53,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:53,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:54,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:54,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:58,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:58,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 05:22:58,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:22:58,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 05:22:58,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:58,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:22:58,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:22:58,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 05:22:58,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:59,292 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 18 [2020-10-27 05:22:59,638 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 05:22:59,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:22:59,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:59,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:59,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:59,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:22:59,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:22:59,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:22:59,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:59,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:22:59,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:22:59,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:22:59,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:22:59,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338746606] [2020-10-27 05:22:59,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:22:59,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:22:59,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548820183] [2020-10-27 05:22:59,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:22:59,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:22:59,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:22:59,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:22:59,710 INFO L87 Difference]: Start difference. First operand 4119 states and 6253 transitions. Second operand 10 states. [2020-10-27 05:22:59,896 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2020-10-27 05:23:00,659 WARN L193 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 185 [2020-10-27 05:23:01,154 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2020-10-27 05:23:01,342 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2020-10-27 05:23:01,622 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2020-10-27 05:23:02,029 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2020-10-27 05:23:03,472 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 184 [2020-10-27 05:23:05,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:23:05,789 INFO L93 Difference]: Finished difference Result 9708 states and 14880 transitions. [2020-10-27 05:23:05,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 05:23:05,790 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-10-27 05:23:05,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:23:05,799 INFO L225 Difference]: With dead ends: 9708 [2020-10-27 05:23:05,799 INFO L226 Difference]: Without dead ends: 5936 [2020-10-27 05:23:05,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2020-10-27 05:23:05,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5936 states. [2020-10-27 05:23:06,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5936 to 4068. [2020-10-27 05:23:06,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4068 states. [2020-10-27 05:23:06,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4068 states to 4068 states and 6187 transitions. [2020-10-27 05:23:06,923 INFO L78 Accepts]: Start accepts. Automaton has 4068 states and 6187 transitions. Word has length 92 [2020-10-27 05:23:06,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:23:06,923 INFO L481 AbstractCegarLoop]: Abstraction has 4068 states and 6187 transitions. [2020-10-27 05:23:06,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:23:06,923 INFO L276 IsEmpty]: Start isEmpty. Operand 4068 states and 6187 transitions. [2020-10-27 05:23:06,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 05:23:06,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:23:06,926 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:23:06,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:23:06,926 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:23:06,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:23:06,926 INFO L82 PathProgramCache]: Analyzing trace with hash 565556492, now seen corresponding path program 1 times [2020-10-27 05:23:06,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:23:06,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655668510] [2020-10-27 05:23:06,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:23:06,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:23:06,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:07,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:07,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:07,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:11,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:23:11,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 05:23:11,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:23:11,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4310 [2020-10-27 05:23:11,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:23:11,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:23:11,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:23:11,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 05:23:11,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:23:11,474 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2020-10-27 05:23:11,605 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-10-27 05:23:11,835 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 18 [2020-10-27 05:23:12,162 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 05:23:12,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:23:12,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:23:12,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:12,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:23:12,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:23:12,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:23:12,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:23:12,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:23:12,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:23:12,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:23:12,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:23:12,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:23:12,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:23:12,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655668510] [2020-10-27 05:23:12,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:23:12,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:23:12,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208718042] [2020-10-27 05:23:12,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:23:12,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:23:12,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:23:12,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:23:12,266 INFO L87 Difference]: Start difference. First operand 4068 states and 6187 transitions. Second operand 10 states. [2020-10-27 05:23:12,693 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:23:14,390 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:23:14,774 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:23:16,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:23:16,859 INFO L93 Difference]: Finished difference Result 9575 states and 14716 transitions. [2020-10-27 05:23:16,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:23:16,860 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-10-27 05:23:16,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:23:16,867 INFO L225 Difference]: With dead ends: 9575 [2020-10-27 05:23:16,867 INFO L226 Difference]: Without dead ends: 5909 [2020-10-27 05:23:16,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:23:16,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5909 states. [2020-10-27 05:23:18,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5909 to 4063. [2020-10-27 05:23:18,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4063 states. [2020-10-27 05:23:18,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4063 states to 4063 states and 6154 transitions. [2020-10-27 05:23:18,251 INFO L78 Accepts]: Start accepts. Automaton has 4063 states and 6154 transitions. Word has length 92 [2020-10-27 05:23:18,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:23:18,251 INFO L481 AbstractCegarLoop]: Abstraction has 4063 states and 6154 transitions. [2020-10-27 05:23:18,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:23:18,252 INFO L276 IsEmpty]: Start isEmpty. Operand 4063 states and 6154 transitions. [2020-10-27 05:23:18,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 05:23:18,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:23:18,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:23:18,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:23:18,254 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:23:18,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:23:18,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1369502859, now seen corresponding path program 1 times [2020-10-27 05:23:18,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:23:18,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588352488] [2020-10-27 05:23:18,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:23:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:23:18,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:18,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:18,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:18,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking...