/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-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:36:13,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:36:13,863 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:36:13,897 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:36:13,897 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:36:13,899 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:36:13,901 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:36:13,903 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:36:13,906 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:36:13,907 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:36:13,908 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:36:13,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:36:13,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:36:13,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:36:13,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:36:13,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:36:13,916 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:36:13,917 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:36:13,929 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:36:13,932 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:36:13,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:36:13,939 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:36:13,941 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:36:13,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:36:13,945 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:36:13,945 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:36:13,945 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:36:13,947 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:36:13,947 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:36:13,948 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:36:13,949 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:36:13,950 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:36:13,950 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:36:13,951 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:36:13,953 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:36:13,953 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:36:13,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:36:13,954 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:36:13,955 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:36:13,956 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:36:13,957 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:36:13,958 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 05:36:13,983 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:36:13,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:36:13,985 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:36:13,986 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:36:13,986 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:36:13,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:36:13,986 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:36:13,987 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:36:13,987 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:36:13,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:36:13,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:36:13,988 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:36:13,988 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:36:13,988 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:36:13,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:36:13,989 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:36:13,989 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:36:13,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:36:13,990 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:36:13,990 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:36:13,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:36:13,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:36:13,991 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:36:13,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:36:13,991 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:36:13,991 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:36:13,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:36:13,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:36:13,992 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:36:13,993 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:36:14,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:36:14,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:36:14,435 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:36:14,437 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:36:14,437 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:36:14,438 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-27 05:36:14,516 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/323d65e68/b41dd2cff0b84936b95cf575e61dfb13/FLAG88c41dda2 [2020-10-27 05:36:15,144 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:36:15,145 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-27 05:36:15,162 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/323d65e68/b41dd2cff0b84936b95cf575e61dfb13/FLAG88c41dda2 [2020-10-27 05:36:15,450 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/323d65e68/b41dd2cff0b84936b95cf575e61dfb13 [2020-10-27 05:36:15,453 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:36:15,467 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:36:15,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:36:15,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:36:15,474 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:36:15,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:36:15" (1/1) ... [2020-10-27 05:36:15,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@142dfa98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:15, skipping insertion in model container [2020-10-27 05:36:15,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:36:15" (1/1) ... [2020-10-27 05:36:15,488 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:36:15,534 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:36:15,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:36:15,871 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:36:15,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:36:15,988 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:36:15,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:15 WrapperNode [2020-10-27 05:36:15,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:36:15,990 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:36:15,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:36:15,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:36:16,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:15" (1/1) ... [2020-10-27 05:36:16,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:15" (1/1) ... [2020-10-27 05:36:16,019 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:15" (1/1) ... [2020-10-27 05:36:16,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:15" (1/1) ... [2020-10-27 05:36:16,038 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:15" (1/1) ... [2020-10-27 05:36:16,049 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:15" (1/1) ... [2020-10-27 05:36:16,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:15" (1/1) ... [2020-10-27 05:36:16,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:36:16,063 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:36:16,063 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:36:16,064 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:36:16,065 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:15" (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 05:36:16,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:36:16,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:36:16,148 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:36:16,148 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:36:16,148 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:36:16,149 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:36:16,149 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:36:16,150 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:36:16,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:36:16,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:36:16,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:36:16,151 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:36:16,152 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:36:16,152 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:36:16,152 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:36:16,153 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:36:16,153 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:36:16,153 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:36:16,153 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:36:16,153 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:36:16,154 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:36:16,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:36:16,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:36:16,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:36:16,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:36:16,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:36:16,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:36:17,092 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:36:17,093 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:36:17,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:36:17 BoogieIcfgContainer [2020-10-27 05:36:17,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:36:17,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:36:17,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:36:17,104 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:36:17,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:36:15" (1/3) ... [2020-10-27 05:36:17,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8fb0835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:36:17, skipping insertion in model container [2020-10-27 05:36:17,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:15" (2/3) ... [2020-10-27 05:36:17,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8fb0835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:36:17, skipping insertion in model container [2020-10-27 05:36:17,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:36:17" (3/3) ... [2020-10-27 05:36:17,109 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-27 05:36:17,126 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:36:17,133 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:36:17,165 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:36:17,233 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:36:17,236 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:36:17,236 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:36:17,236 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:36:17,237 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:36:17,237 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:36:17,237 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:36:17,237 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:36:17,261 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states. [2020-10-27 05:36:17,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 05:36:17,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:36:17,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:36:17,272 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:36:17,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:36:17,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1354154435, now seen corresponding path program 1 times [2020-10-27 05:36:17,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:36:17,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961795433] [2020-10-27 05:36:17,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:36:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:17,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:17,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:18,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:19,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:19,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 05:36:19,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:36:19,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2380 [2020-10-27 05:36:19,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:19,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:36:19,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:36:19,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 05:36:19,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 05:36:20,364 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:36:20,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:36:20,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:20,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:20,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:20,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:36:20,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:36:20,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-27 05:36:20,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:20,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:36:20,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:36:20,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:36:20,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:20,493 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 05:36:20,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961795433] [2020-10-27 05:36:20,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:36:20,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:36:20,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544875573] [2020-10-27 05:36:20,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:36:20,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:36:20,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:36:20,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:36:20,535 INFO L87 Difference]: Start difference. First operand 157 states. Second operand 6 states. [2020-10-27 05:36:21,641 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:36:21,873 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:36:22,109 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 05:36:22,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:36:22,779 INFO L93 Difference]: Finished difference Result 460 states and 750 transitions. [2020-10-27 05:36:22,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:36:22,786 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-27 05:36:22,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:36:22,803 INFO L225 Difference]: With dead ends: 460 [2020-10-27 05:36:22,803 INFO L226 Difference]: Without dead ends: 333 [2020-10-27 05:36:22,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:36:22,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-10-27 05:36:22,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 327. [2020-10-27 05:36:22,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-10-27 05:36:22,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 480 transitions. [2020-10-27 05:36:22,897 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 480 transitions. Word has length 54 [2020-10-27 05:36:22,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:36:22,898 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 480 transitions. [2020-10-27 05:36:22,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:36:22,898 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 480 transitions. [2020-10-27 05:36:22,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:36:22,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:36:22,901 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] [2020-10-27 05:36:22,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:36:22,902 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:36:22,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:36:22,903 INFO L82 PathProgramCache]: Analyzing trace with hash 461131440, now seen corresponding path program 1 times [2020-10-27 05:36:22,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:36:22,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642420485] [2020-10-27 05:36:22,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:36:22,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:22,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:22,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:23,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:23,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:23,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:36:23,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:36:23,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1055 [2020-10-27 05:36:23,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:23,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:36:23,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:36:23,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 05:36:23,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:24,270 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:36:24,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:36:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:24,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:24,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:24,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:36:24,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:36:24,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 05:36:24,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:24,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:36:24,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:36:24,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:36:24,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:24,338 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 05:36:24,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642420485] [2020-10-27 05:36:24,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:36:24,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:36:24,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150164103] [2020-10-27 05:36:24,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:36:24,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:36:24,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:36:24,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:36:24,342 INFO L87 Difference]: Start difference. First operand 327 states and 480 transitions. Second operand 6 states. [2020-10-27 05:36:24,533 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:36:25,029 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:36:25,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:36:25,385 INFO L93 Difference]: Finished difference Result 820 states and 1228 transitions. [2020-10-27 05:36:25,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:36:25,386 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-27 05:36:25,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:36:25,391 INFO L225 Difference]: With dead ends: 820 [2020-10-27 05:36:25,391 INFO L226 Difference]: Without dead ends: 537 [2020-10-27 05:36:25,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:36:25,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2020-10-27 05:36:25,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 534. [2020-10-27 05:36:25,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2020-10-27 05:36:25,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 792 transitions. [2020-10-27 05:36:25,464 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 792 transitions. Word has length 55 [2020-10-27 05:36:25,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:36:25,464 INFO L481 AbstractCegarLoop]: Abstraction has 534 states and 792 transitions. [2020-10-27 05:36:25,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:36:25,464 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 792 transitions. [2020-10-27 05:36:25,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:36:25,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:36:25,467 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] [2020-10-27 05:36:25,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:36:25,468 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:36:25,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:36:25,469 INFO L82 PathProgramCache]: Analyzing trace with hash 2128322625, now seen corresponding path program 1 times [2020-10-27 05:36:25,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:36:25,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627112868] [2020-10-27 05:36:25,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:36:25,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:25,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:25,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:25,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:26,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:26,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:36:26,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:36:26,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 940 [2020-10-27 05:36:26,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:26,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:36:26,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:36:26,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 05:36:26,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:26,685 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:36:26,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:36:26,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:26,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:26,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:26,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:36:26,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:36:26,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 05:36:26,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:26,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:36:26,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:36:26,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:36:26,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:26,741 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 05:36:26,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627112868] [2020-10-27 05:36:26,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:36:26,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:36:26,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125967355] [2020-10-27 05:36:26,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:36:26,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:36:26,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:36:26,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:36:26,744 INFO L87 Difference]: Start difference. First operand 534 states and 792 transitions. Second operand 6 states. [2020-10-27 05:36:26,922 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:36:27,354 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:36:27,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:36:27,768 INFO L93 Difference]: Finished difference Result 1391 states and 2097 transitions. [2020-10-27 05:36:27,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:36:27,769 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-27 05:36:27,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:36:27,775 INFO L225 Difference]: With dead ends: 1391 [2020-10-27 05:36:27,775 INFO L226 Difference]: Without dead ends: 921 [2020-10-27 05:36:27,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:36:27,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2020-10-27 05:36:27,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 918. [2020-10-27 05:36:27,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 918 states. [2020-10-27 05:36:27,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1371 transitions. [2020-10-27 05:36:27,853 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1371 transitions. Word has length 55 [2020-10-27 05:36:27,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:36:27,854 INFO L481 AbstractCegarLoop]: Abstraction has 918 states and 1371 transitions. [2020-10-27 05:36:27,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:36:27,854 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1371 transitions. [2020-10-27 05:36:27,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:36:27,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:36:27,856 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] [2020-10-27 05:36:27,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:36:27,857 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:36:27,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:36:27,857 INFO L82 PathProgramCache]: Analyzing trace with hash -2115060664, now seen corresponding path program 1 times [2020-10-27 05:36:27,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:36:27,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630917455] [2020-10-27 05:36:27,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:36:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:27,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:27,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:28,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:28,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:30,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:30,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:36:30,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:36:30,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3102 [2020-10-27 05:36:30,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:30,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:36:30,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:36:30,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:36:30,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:31,320 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:36:31,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:36:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:31,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:31,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:31,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:36:31,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:36:31,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 05:36:31,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:31,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:36:31,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:36:31,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:36:31,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:31,395 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 05:36:31,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630917455] [2020-10-27 05:36:31,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:36:31,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:36:31,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575498695] [2020-10-27 05:36:31,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:36:31,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:36:31,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:36:31,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:36:31,398 INFO L87 Difference]: Start difference. First operand 918 states and 1371 transitions. Second operand 11 states. [2020-10-27 05:36:31,663 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 05:36:32,633 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:36:32,875 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:36:34,634 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:36:35,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:36:35,152 INFO L93 Difference]: Finished difference Result 4780 states and 7274 transitions. [2020-10-27 05:36:35,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 05:36:35,153 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-27 05:36:35,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:36:35,189 INFO L225 Difference]: With dead ends: 4780 [2020-10-27 05:36:35,189 INFO L226 Difference]: Without dead ends: 4323 [2020-10-27 05:36:35,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=296, Invalid=1110, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 05:36:35,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4323 states. [2020-10-27 05:36:35,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4323 to 955. [2020-10-27 05:36:35,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 955 states. [2020-10-27 05:36:35,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1420 transitions. [2020-10-27 05:36:35,383 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1420 transitions. Word has length 56 [2020-10-27 05:36:35,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:36:35,385 INFO L481 AbstractCegarLoop]: Abstraction has 955 states and 1420 transitions. [2020-10-27 05:36:35,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:36:35,386 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1420 transitions. [2020-10-27 05:36:35,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:36:35,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:36:35,393 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] [2020-10-27 05:36:35,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:36:35,393 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:36:35,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:36:35,394 INFO L82 PathProgramCache]: Analyzing trace with hash 197229544, now seen corresponding path program 1 times [2020-10-27 05:36:35,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:36:35,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389838014] [2020-10-27 05:36:35,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:36:35,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:35,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:35,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:35,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:35,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:38,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:38,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:36:38,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:36:38,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3013 [2020-10-27 05:36:38,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:38,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:36:38,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:36:38,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 05:36:38,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:38,793 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:36:38,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:36:38,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:38,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:38,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:38,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:36:38,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:36:38,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:36:38,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:38,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:36:38,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:36:38,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:36:38,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:38,860 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 05:36:38,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389838014] [2020-10-27 05:36:38,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:36:38,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:36:38,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183523074] [2020-10-27 05:36:38,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:36:38,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:36:38,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:36:38,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:36:38,863 INFO L87 Difference]: Start difference. First operand 955 states and 1420 transitions. Second operand 11 states. [2020-10-27 05:36:39,103 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-27 05:36:40,196 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:36:40,377 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:36:41,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:36:41,899 INFO L93 Difference]: Finished difference Result 3064 states and 4606 transitions. [2020-10-27 05:36:41,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 05:36:41,900 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-27 05:36:41,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:36:41,917 INFO L225 Difference]: With dead ends: 3064 [2020-10-27 05:36:41,918 INFO L226 Difference]: Without dead ends: 2757 [2020-10-27 05:36:41,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2020-10-27 05:36:41,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2020-10-27 05:36:42,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 955. [2020-10-27 05:36:42,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 955 states. [2020-10-27 05:36:42,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1418 transitions. [2020-10-27 05:36:42,057 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1418 transitions. Word has length 56 [2020-10-27 05:36:42,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:36:42,057 INFO L481 AbstractCegarLoop]: Abstraction has 955 states and 1418 transitions. [2020-10-27 05:36:42,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:36:42,057 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1418 transitions. [2020-10-27 05:36:42,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:36:42,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:36:42,059 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] [2020-10-27 05:36:42,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:36:42,059 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:36:42,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:36:42,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1333286751, now seen corresponding path program 1 times [2020-10-27 05:36:42,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:36:42,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025241810] [2020-10-27 05:36:42,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:36:42,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:42,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:42,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:42,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:43,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:43,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:36:43,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:36:43,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 930 [2020-10-27 05:36:43,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:43,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:36:43,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:36:43,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 05:36:43,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:43,232 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:36:43,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:36:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:43,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:43,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:43,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:36:43,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:36:43,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 05:36:43,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:43,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:36:43,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:36:43,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:36:43,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:43,308 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 05:36:43,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025241810] [2020-10-27 05:36:43,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:36:43,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:36:43,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292804076] [2020-10-27 05:36:43,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:36:43,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:36:43,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:36:43,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:36:43,312 INFO L87 Difference]: Start difference. First operand 955 states and 1418 transitions. Second operand 6 states. [2020-10-27 05:36:43,498 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:36:43,942 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:36:44,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:36:44,446 INFO L93 Difference]: Finished difference Result 2688 states and 4023 transitions. [2020-10-27 05:36:44,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:36:44,447 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-27 05:36:44,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:36:44,457 INFO L225 Difference]: With dead ends: 2688 [2020-10-27 05:36:44,457 INFO L226 Difference]: Without dead ends: 1772 [2020-10-27 05:36:44,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:36:44,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2020-10-27 05:36:44,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1769. [2020-10-27 05:36:44,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1769 states. [2020-10-27 05:36:44,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2621 transitions. [2020-10-27 05:36:44,711 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2621 transitions. Word has length 56 [2020-10-27 05:36:44,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:36:44,711 INFO L481 AbstractCegarLoop]: Abstraction has 1769 states and 2621 transitions. [2020-10-27 05:36:44,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:36:44,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2621 transitions. [2020-10-27 05:36:44,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:36:44,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:36:44,714 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] [2020-10-27 05:36:44,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:36:44,714 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:36:44,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:36:44,715 INFO L82 PathProgramCache]: Analyzing trace with hash 295327590, now seen corresponding path program 1 times [2020-10-27 05:36:44,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:36:44,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547425185] [2020-10-27 05:36:44,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:36:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:44,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:44,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:45,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:45,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:36:45,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:36:45,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-10-27 05:36:45,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:45,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:36:45,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 05:36:45,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:36:45,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:45,237 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:36:45,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:36:45,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:45,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:45,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:45,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:36:45,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:36:45,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:36:45,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:45,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:36:45,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:36:45,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:36:45,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:45,271 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 05:36:45,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547425185] [2020-10-27 05:36:45,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:36:45,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:36:45,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590694024] [2020-10-27 05:36:45,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:36:45,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:36:45,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:36:45,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:36:45,274 INFO L87 Difference]: Start difference. First operand 1769 states and 2621 transitions. Second operand 6 states. [2020-10-27 05:36:45,458 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:36:45,960 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:36:46,159 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 05:36:47,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:36:47,042 INFO L93 Difference]: Finished difference Result 5691 states and 8515 transitions. [2020-10-27 05:36:47,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:36:47,043 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-27 05:36:47,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:36:47,067 INFO L225 Difference]: With dead ends: 5691 [2020-10-27 05:36:47,068 INFO L226 Difference]: Without dead ends: 4584 [2020-10-27 05:36:47,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:36:47,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4584 states. [2020-10-27 05:36:47,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4584 to 3268. [2020-10-27 05:36:47,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3268 states. [2020-10-27 05:36:47,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3268 states to 3268 states and 4795 transitions. [2020-10-27 05:36:47,510 INFO L78 Accepts]: Start accepts. Automaton has 3268 states and 4795 transitions. Word has length 57 [2020-10-27 05:36:47,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:36:47,510 INFO L481 AbstractCegarLoop]: Abstraction has 3268 states and 4795 transitions. [2020-10-27 05:36:47,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:36:47,510 INFO L276 IsEmpty]: Start isEmpty. Operand 3268 states and 4795 transitions. [2020-10-27 05:36:47,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:36:47,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:36:47,512 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] [2020-10-27 05:36:47,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:36:47,513 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:36:47,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:36:47,514 INFO L82 PathProgramCache]: Analyzing trace with hash -932256451, now seen corresponding path program 1 times [2020-10-27 05:36:47,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:36:47,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831517012] [2020-10-27 05:36:47,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:36:47,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:47,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:47,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:47,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:49,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:49,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:36:49,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:36:49,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2205 [2020-10-27 05:36:49,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:49,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:36:49,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:36:49,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:36:49,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:50,021 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 26 [2020-10-27 05:36:50,210 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:36:50,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:36:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:50,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:50,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:50,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:36:50,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:36:50,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:36:50,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:50,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:36:50,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:36:50,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:36:50,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:50,279 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 05:36:50,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831517012] [2020-10-27 05:36:50,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:36:50,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:36:50,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486309227] [2020-10-27 05:36:50,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:36:50,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:36:50,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:36:50,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:36:50,291 INFO L87 Difference]: Start difference. First operand 3268 states and 4795 transitions. Second operand 10 states. [2020-10-27 05:36:50,546 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:36:51,638 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:36:53,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:36:53,092 INFO L93 Difference]: Finished difference Result 11396 states and 16864 transitions. [2020-10-27 05:36:53,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 05:36:53,093 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-10-27 05:36:53,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:36:53,138 INFO L225 Difference]: With dead ends: 11396 [2020-10-27 05:36:53,138 INFO L226 Difference]: Without dead ends: 8277 [2020-10-27 05:36:53,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2020-10-27 05:36:53,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8277 states. [2020-10-27 05:36:53,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8277 to 4346. [2020-10-27 05:36:53,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4346 states. [2020-10-27 05:36:53,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4346 states to 4346 states and 6405 transitions. [2020-10-27 05:36:53,855 INFO L78 Accepts]: Start accepts. Automaton has 4346 states and 6405 transitions. Word has length 59 [2020-10-27 05:36:53,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:36:53,856 INFO L481 AbstractCegarLoop]: Abstraction has 4346 states and 6405 transitions. [2020-10-27 05:36:53,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:36:53,857 INFO L276 IsEmpty]: Start isEmpty. Operand 4346 states and 6405 transitions. [2020-10-27 05:36:53,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:36:53,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:36:53,859 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] [2020-10-27 05:36:53,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:36:53,860 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:36:53,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:36:53,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1467749027, now seen corresponding path program 1 times [2020-10-27 05:36:53,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:36:53,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358240776] [2020-10-27 05:36:53,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:36:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:53,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:53,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:53,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:55,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:55,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:36:55,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:36:55,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2052 [2020-10-27 05:36:55,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:55,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:36:55,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:36:55,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 05:36:55,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:56,411 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:36:56,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:36:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:56,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:56,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:56,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:36:56,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:36:56,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:36:56,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:56,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:36:56,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:36:56,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:36:56,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:36:56,470 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 05:36:56,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358240776] [2020-10-27 05:36:56,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:36:56,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:36:56,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509842908] [2020-10-27 05:36:56,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:36:56,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:36:56,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:36:56,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:36:56,474 INFO L87 Difference]: Start difference. First operand 4346 states and 6405 transitions. Second operand 10 states. [2020-10-27 05:36:56,742 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:36:57,770 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-27 05:37:00,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:37:00,233 INFO L93 Difference]: Finished difference Result 17645 states and 26157 transitions. [2020-10-27 05:37:00,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:37:00,234 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-10-27 05:37:00,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:37:00,277 INFO L225 Difference]: With dead ends: 17645 [2020-10-27 05:37:00,278 INFO L226 Difference]: Without dead ends: 13429 [2020-10-27 05:37:00,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:37:00,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13429 states. [2020-10-27 05:37:01,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13429 to 5260. [2020-10-27 05:37:01,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5260 states. [2020-10-27 05:37:01,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5260 states to 5260 states and 7766 transitions. [2020-10-27 05:37:01,127 INFO L78 Accepts]: Start accepts. Automaton has 5260 states and 7766 transitions. Word has length 59 [2020-10-27 05:37:01,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:37:01,128 INFO L481 AbstractCegarLoop]: Abstraction has 5260 states and 7766 transitions. [2020-10-27 05:37:01,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:37:01,128 INFO L276 IsEmpty]: Start isEmpty. Operand 5260 states and 7766 transitions. [2020-10-27 05:37:01,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:37:01,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:37:01,130 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] [2020-10-27 05:37:01,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:37:01,131 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:37:01,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:37:01,131 INFO L82 PathProgramCache]: Analyzing trace with hash -528393903, now seen corresponding path program 1 times [2020-10-27 05:37:01,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:37:01,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146174820] [2020-10-27 05:37:01,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:37:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:01,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:01,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:01,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:01,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:03,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:03,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:37:03,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:37:03,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2646 [2020-10-27 05:37:03,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:03,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:37:03,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:37:03,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:37:03,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:04,019 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:37:04,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:37:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:04,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:04,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:04,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:37:04,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:37:04,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 05:37:04,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:04,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:37:04,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:37:04,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:37:04,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:04,062 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 05:37:04,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146174820] [2020-10-27 05:37:04,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:37:04,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:37:04,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117113722] [2020-10-27 05:37:04,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:37:04,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:37:04,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:37:04,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:37:04,065 INFO L87 Difference]: Start difference. First operand 5260 states and 7766 transitions. Second operand 8 states. [2020-10-27 05:37:04,269 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:37:04,875 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-27 05:37:06,199 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:37:07,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:37:07,092 INFO L93 Difference]: Finished difference Result 13088 states and 19167 transitions. [2020-10-27 05:37:07,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:37:07,092 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-10-27 05:37:07,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:37:07,117 INFO L225 Difference]: With dead ends: 13088 [2020-10-27 05:37:07,117 INFO L226 Difference]: Without dead ends: 10697 [2020-10-27 05:37:07,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:37:07,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10697 states. [2020-10-27 05:37:07,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10697 to 5112. [2020-10-27 05:37:07,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5112 states. [2020-10-27 05:37:07,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5112 states to 5112 states and 7542 transitions. [2020-10-27 05:37:07,923 INFO L78 Accepts]: Start accepts. Automaton has 5112 states and 7542 transitions. Word has length 60 [2020-10-27 05:37:07,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:37:07,924 INFO L481 AbstractCegarLoop]: Abstraction has 5112 states and 7542 transitions. [2020-10-27 05:37:07,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:37:07,924 INFO L276 IsEmpty]: Start isEmpty. Operand 5112 states and 7542 transitions. [2020-10-27 05:37:07,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:37:07,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:37:07,925 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] [2020-10-27 05:37:07,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:37:07,926 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:37:07,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:37:07,926 INFO L82 PathProgramCache]: Analyzing trace with hash -801769521, now seen corresponding path program 1 times [2020-10-27 05:37:07,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:37:07,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473530529] [2020-10-27 05:37:07,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:37:07,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:07,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:07,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:08,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:08,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:08,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:08,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:10,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:10,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:37:10,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:37:10,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2288 [2020-10-27 05:37:10,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:10,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:37:10,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:37:10,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:37:10,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:10,446 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:37:10,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:37:10,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:10,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:10,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:10,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:37:10,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:37:10,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:37:10,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:10,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:37:10,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:37:10,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:37:10,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:10,490 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 05:37:10,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473530529] [2020-10-27 05:37:10,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:37:10,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:37:10,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268273542] [2020-10-27 05:37:10,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:37:10,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:37:10,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:37:10,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:37:10,493 INFO L87 Difference]: Start difference. First operand 5112 states and 7542 transitions. Second operand 8 states. [2020-10-27 05:37:10,687 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 05:37:11,303 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:37:13,018 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:37:15,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:37:15,479 INFO L93 Difference]: Finished difference Result 24952 states and 36414 transitions. [2020-10-27 05:37:15,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:37:15,480 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-10-27 05:37:15,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:37:15,530 INFO L225 Difference]: With dead ends: 24952 [2020-10-27 05:37:15,531 INFO L226 Difference]: Without dead ends: 23688 [2020-10-27 05:37:15,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:37:15,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23688 states. [2020-10-27 05:37:16,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23688 to 5191. [2020-10-27 05:37:16,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5191 states. [2020-10-27 05:37:16,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5191 states to 5191 states and 7647 transitions. [2020-10-27 05:37:16,569 INFO L78 Accepts]: Start accepts. Automaton has 5191 states and 7647 transitions. Word has length 60 [2020-10-27 05:37:16,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:37:16,569 INFO L481 AbstractCegarLoop]: Abstraction has 5191 states and 7647 transitions. [2020-10-27 05:37:16,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:37:16,569 INFO L276 IsEmpty]: Start isEmpty. Operand 5191 states and 7647 transitions. [2020-10-27 05:37:16,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:37:16,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:37:16,572 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] [2020-10-27 05:37:16,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:37:16,572 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:37:16,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:37:16,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1100473675, now seen corresponding path program 1 times [2020-10-27 05:37:16,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:37:16,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516136524] [2020-10-27 05:37:16,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:37:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:16,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:16,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:16,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:16,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:16,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:16,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:19,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:19,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:37:19,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:37:19,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2985 [2020-10-27 05:37:19,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:19,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:37:19,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:37:19,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 05:37:19,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:19,925 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:37:19,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:37:19,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:19,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:19,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:19,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:37:19,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:37:19,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 05:37:19,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:19,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:37:19,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:37:19,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:37:19,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:19,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:37:19,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516136524] [2020-10-27 05:37:19,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:37:19,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:37:19,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297820273] [2020-10-27 05:37:19,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:37:19,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:37:19,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:37:19,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:37:19,992 INFO L87 Difference]: Start difference. First operand 5191 states and 7647 transitions. Second operand 12 states. [2020-10-27 05:37:20,187 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 05:37:21,851 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:37:22,185 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 05:37:25,228 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:37:25,457 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 05:37:29,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:37:29,410 INFO L93 Difference]: Finished difference Result 33592 states and 49010 transitions. [2020-10-27 05:37:29,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 05:37:29,410 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 60 [2020-10-27 05:37:29,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:37:29,474 INFO L225 Difference]: With dead ends: 33592 [2020-10-27 05:37:29,474 INFO L226 Difference]: Without dead ends: 29461 [2020-10-27 05:37:29,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=594, Invalid=2486, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 05:37:29,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29461 states. [2020-10-27 05:37:30,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29461 to 5778. [2020-10-27 05:37:30,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5778 states. [2020-10-27 05:37:30,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5778 states to 5778 states and 8508 transitions. [2020-10-27 05:37:30,839 INFO L78 Accepts]: Start accepts. Automaton has 5778 states and 8508 transitions. Word has length 60 [2020-10-27 05:37:30,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:37:30,839 INFO L481 AbstractCegarLoop]: Abstraction has 5778 states and 8508 transitions. [2020-10-27 05:37:30,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:37:30,839 INFO L276 IsEmpty]: Start isEmpty. Operand 5778 states and 8508 transitions. [2020-10-27 05:37:30,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:37:30,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:37:30,842 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] [2020-10-27 05:37:30,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:37:30,842 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:37:30,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:37:30,843 INFO L82 PathProgramCache]: Analyzing trace with hash -896977057, now seen corresponding path program 1 times [2020-10-27 05:37:30,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:37:30,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537343423] [2020-10-27 05:37:30,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:37:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:30,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:30,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:30,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:31,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:31,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:31,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:32,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:35,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:35,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:37:35,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:37:35,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 05:37:35,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:35,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:37:35,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:37:35,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:37:35,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:36,201 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:37:36,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:37:36,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:36,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:36,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:36,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:37:36,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:37:36,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 05:37:36,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:36,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:37:36,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:37:36,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:37:36,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:36,262 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 05:37:36,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537343423] [2020-10-27 05:37:36,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:37:36,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:37:36,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458163285] [2020-10-27 05:37:36,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:37:36,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:37:36,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:37:36,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:37:36,265 INFO L87 Difference]: Start difference. First operand 5778 states and 8508 transitions. Second operand 11 states. [2020-10-27 05:37:36,485 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-27 05:37:37,892 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:37:38,192 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:37:42,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:37:42,922 INFO L93 Difference]: Finished difference Result 23307 states and 34339 transitions. [2020-10-27 05:37:42,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 05:37:42,922 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-10-27 05:37:42,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:37:42,957 INFO L225 Difference]: With dead ends: 23307 [2020-10-27 05:37:42,958 INFO L226 Difference]: Without dead ends: 18232 [2020-10-27 05:37:42,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2020-10-27 05:37:42,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18232 states. [2020-10-27 05:37:44,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18232 to 5222. [2020-10-27 05:37:44,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5222 states. [2020-10-27 05:37:44,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5222 states to 5222 states and 7676 transitions. [2020-10-27 05:37:44,196 INFO L78 Accepts]: Start accepts. Automaton has 5222 states and 7676 transitions. Word has length 60 [2020-10-27 05:37:44,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:37:44,196 INFO L481 AbstractCegarLoop]: Abstraction has 5222 states and 7676 transitions. [2020-10-27 05:37:44,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:37:44,196 INFO L276 IsEmpty]: Start isEmpty. Operand 5222 states and 7676 transitions. [2020-10-27 05:37:44,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:37:44,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:37:44,198 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] [2020-10-27 05:37:44,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:37:44,198 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:37:44,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:37:44,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1699529503, now seen corresponding path program 1 times [2020-10-27 05:37:44,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:37:44,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217981914] [2020-10-27 05:37:44,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:37:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:44,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:44,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:44,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:45,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:45,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:37:45,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:37:45,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1763 [2020-10-27 05:37:45,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:45,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:37:45,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:37:45,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 05:37:45,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:46,436 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:37:46,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:37:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:46,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:46,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:46,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:37:46,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:37:46,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:37:46,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:46,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:37:46,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:37:46,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:37:46,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:37:46,498 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 05:37:46,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217981914] [2020-10-27 05:37:46,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:37:46,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:37:46,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513183326] [2020-10-27 05:37:46,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:37:46,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:37:46,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:37:46,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:37:46,501 INFO L87 Difference]: Start difference. First operand 5222 states and 7676 transitions. Second operand 10 states. [2020-10-27 05:37:46,773 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:37:48,068 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-27 05:37:50,327 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:37:52,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:37:52,880 INFO L93 Difference]: Finished difference Result 19724 states and 29167 transitions. [2020-10-27 05:37:52,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 05:37:52,880 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-10-27 05:37:52,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:37:52,906 INFO L225 Difference]: With dead ends: 19724 [2020-10-27 05:37:52,906 INFO L226 Difference]: Without dead ends: 17885 [2020-10-27 05:37:52,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2020-10-27 05:37:52,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17885 states. [2020-10-27 05:37:54,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17885 to 5058. [2020-10-27 05:37:54,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5058 states. [2020-10-27 05:37:54,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5058 states to 5058 states and 7423 transitions. [2020-10-27 05:37:54,166 INFO L78 Accepts]: Start accepts. Automaton has 5058 states and 7423 transitions. Word has length 60 [2020-10-27 05:37:54,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:37:54,167 INFO L481 AbstractCegarLoop]: Abstraction has 5058 states and 7423 transitions. [2020-10-27 05:37:54,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:37:54,167 INFO L276 IsEmpty]: Start isEmpty. Operand 5058 states and 7423 transitions. [2020-10-27 05:37:54,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 05:37:54,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:37:54,169 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] [2020-10-27 05:37:54,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:37:54,169 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:37:54,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:37:54,169 INFO L82 PathProgramCache]: Analyzing trace with hash 938365063, now seen corresponding path program 1 times [2020-10-27 05:37:54,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:37:54,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154313741] [2020-10-27 05:37:54,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:37:54,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:54,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:54,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:54,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:54,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:55,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:55,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 05:37:55,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:37:55,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1582 [2020-10-27 05:37:55,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:55,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:37:55,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:37:55,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 05:37:55,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:56,064 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:37:56,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:37:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:56,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:56,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:56,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:37:56,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:37:56,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 05:37:56,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:56,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:37:56,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:37:56,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:37:56,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:56,127 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 05:37:56,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154313741] [2020-10-27 05:37:56,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:37:56,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:37:56,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817525815] [2020-10-27 05:37:56,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:37:56,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:37:56,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:37:56,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:37:56,130 INFO L87 Difference]: Start difference. First operand 5058 states and 7423 transitions. Second operand 8 states. [2020-10-27 05:37:56,310 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:37:58,267 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 05:37:58,881 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:38:02,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:02,692 INFO L93 Difference]: Finished difference Result 23474 states and 34397 transitions. [2020-10-27 05:38:02,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:38:02,692 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2020-10-27 05:38:02,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:02,713 INFO L225 Difference]: With dead ends: 23474 [2020-10-27 05:38:02,713 INFO L226 Difference]: Without dead ends: 18813 [2020-10-27 05:38:02,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:38:02,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18813 states. [2020-10-27 05:38:03,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18813 to 4313. [2020-10-27 05:38:03,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4313 states. [2020-10-27 05:38:03,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4313 states to 4313 states and 6288 transitions. [2020-10-27 05:38:03,827 INFO L78 Accepts]: Start accepts. Automaton has 4313 states and 6288 transitions. Word has length 61 [2020-10-27 05:38:03,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:03,827 INFO L481 AbstractCegarLoop]: Abstraction has 4313 states and 6288 transitions. [2020-10-27 05:38:03,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:38:03,827 INFO L276 IsEmpty]: Start isEmpty. Operand 4313 states and 6288 transitions. [2020-10-27 05:38:03,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 05:38:03,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:03,833 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] [2020-10-27 05:38:03,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:38:03,833 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:03,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:03,834 INFO L82 PathProgramCache]: Analyzing trace with hash 982275718, now seen corresponding path program 1 times [2020-10-27 05:38:03,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:03,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674196339] [2020-10-27 05:38:03,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:03,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:03,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:04,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:04,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:04,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 05:38:04,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:38:04,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 501 [2020-10-27 05:38:04,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:04,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:38:04,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 05:38:04,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 05:38:04,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:04,566 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:38:04,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:04,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:04,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:04,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:04,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:04,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:38:04,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:04,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:38:04,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:04,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:38:04,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:04,591 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 05:38:04,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674196339] [2020-10-27 05:38:04,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:04,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:38:04,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205826684] [2020-10-27 05:38:04,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:38:04,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:04,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:38:04,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:38:04,593 INFO L87 Difference]: Start difference. First operand 4313 states and 6288 transitions. Second operand 4 states. [2020-10-27 05:38:04,787 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:38:07,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:07,388 INFO L93 Difference]: Finished difference Result 11303 states and 16580 transitions. [2020-10-27 05:38:07,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:38:07,389 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-10-27 05:38:07,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:07,396 INFO L225 Difference]: With dead ends: 11303 [2020-10-27 05:38:07,397 INFO L226 Difference]: Without dead ends: 7622 [2020-10-27 05:38:07,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:38:07,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7622 states. [2020-10-27 05:38:09,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7622 to 7103. [2020-10-27 05:38:09,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7103 states. [2020-10-27 05:38:09,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7103 states to 7103 states and 10338 transitions. [2020-10-27 05:38:09,120 INFO L78 Accepts]: Start accepts. Automaton has 7103 states and 10338 transitions. Word has length 76 [2020-10-27 05:38:09,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:09,121 INFO L481 AbstractCegarLoop]: Abstraction has 7103 states and 10338 transitions. [2020-10-27 05:38:09,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:38:09,121 INFO L276 IsEmpty]: Start isEmpty. Operand 7103 states and 10338 transitions. [2020-10-27 05:38:09,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 05:38:09,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:09,126 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] [2020-10-27 05:38:09,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:38:09,126 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:09,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:09,127 INFO L82 PathProgramCache]: Analyzing trace with hash 2074616039, now seen corresponding path program 1 times [2020-10-27 05:38:09,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:09,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750081867] [2020-10-27 05:38:09,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:09,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:09,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:09,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:09,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:09,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:09,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:09,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:09,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:10,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:10,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 05:38:10,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:38:10,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1623 [2020-10-27 05:38:10,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:10,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:38:10,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:38:10,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 05:38:10,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:10,990 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:38:10,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:10,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:10,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:11,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:11,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:11,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:11,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:38:11,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:11,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:38:11,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:11,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:38:11,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:11,028 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 05:38:11,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750081867] [2020-10-27 05:38:11,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:11,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:38:11,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445738248] [2020-10-27 05:38:11,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:38:11,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:11,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:38:11,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:38:11,030 INFO L87 Difference]: Start difference. First operand 7103 states and 10338 transitions. Second operand 6 states. [2020-10-27 05:38:12,588 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 05:38:12,838 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:38:13,071 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:38:15,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:15,193 INFO L93 Difference]: Finished difference Result 11929 states and 17290 transitions. [2020-10-27 05:38:15,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:38:15,194 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-10-27 05:38:15,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:15,204 INFO L225 Difference]: With dead ends: 11929 [2020-10-27 05:38:15,204 INFO L226 Difference]: Without dead ends: 9841 [2020-10-27 05:38:15,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:38:15,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9841 states. [2020-10-27 05:38:17,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9841 to 8283. [2020-10-27 05:38:17,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8283 states. [2020-10-27 05:38:17,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8283 states to 8283 states and 11903 transitions. [2020-10-27 05:38:17,377 INFO L78 Accepts]: Start accepts. Automaton has 8283 states and 11903 transitions. Word has length 77 [2020-10-27 05:38:17,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:17,377 INFO L481 AbstractCegarLoop]: Abstraction has 8283 states and 11903 transitions. [2020-10-27 05:38:17,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:38:17,377 INFO L276 IsEmpty]: Start isEmpty. Operand 8283 states and 11903 transitions. [2020-10-27 05:38:17,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 05:38:17,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:17,382 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] [2020-10-27 05:38:17,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:38:17,383 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:17,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:17,383 INFO L82 PathProgramCache]: Analyzing trace with hash -153313669, now seen corresponding path program 1 times [2020-10-27 05:38:17,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:17,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305843069] [2020-10-27 05:38:17,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:17,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:17,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:17,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:17,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 05:38:17,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:38:17,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 228 [2020-10-27 05:38:17,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:17,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:38:17,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-27 05:38:17,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 05:38:17,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:17,834 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:38:17,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:17,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:17,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:17,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:17,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:17,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:38:17,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:17,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:38:17,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:17,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:38:17,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:17,858 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 05:38:17,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305843069] [2020-10-27 05:38:17,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:17,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:38:17,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277985313] [2020-10-27 05:38:17,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:38:17,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:17,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:38:17,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:38:17,860 INFO L87 Difference]: Start difference. First operand 8283 states and 11903 transitions. Second operand 4 states. [2020-10-27 05:38:18,059 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:38:22,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:22,953 INFO L93 Difference]: Finished difference Result 22553 states and 32515 transitions. [2020-10-27 05:38:22,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:38:22,954 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-27 05:38:22,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:22,970 INFO L225 Difference]: With dead ends: 22553 [2020-10-27 05:38:22,970 INFO L226 Difference]: Without dead ends: 15030 [2020-10-27 05:38:22,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:38:22,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15030 states. [2020-10-27 05:38:26,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15030 to 13943. [2020-10-27 05:38:26,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13943 states. [2020-10-27 05:38:26,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13943 states to 13943 states and 19971 transitions. [2020-10-27 05:38:26,816 INFO L78 Accepts]: Start accepts. Automaton has 13943 states and 19971 transitions. Word has length 77 [2020-10-27 05:38:26,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:26,816 INFO L481 AbstractCegarLoop]: Abstraction has 13943 states and 19971 transitions. [2020-10-27 05:38:26,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:38:26,816 INFO L276 IsEmpty]: Start isEmpty. Operand 13943 states and 19971 transitions. [2020-10-27 05:38:26,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 05:38:26,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:26,820 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:38:26,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 05:38:26,821 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:26,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:26,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1669203254, now seen corresponding path program 1 times [2020-10-27 05:38:26,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:26,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108315344] [2020-10-27 05:38:26,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:26,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:26,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:26,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:27,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:28,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:28,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 05:38:28,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:38:28,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1556 [2020-10-27 05:38:28,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:28,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:38:28,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:38:28,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 05:38:28,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:28,760 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:38:28,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:28,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:28,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:28,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:28,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:28,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:38:28,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:28,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:38:28,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:28,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:38:28,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:28,786 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 05:38:28,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108315344] [2020-10-27 05:38:28,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:28,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:38:28,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529048809] [2020-10-27 05:38:28,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:38:28,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:28,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:38:28,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:38:28,788 INFO L87 Difference]: Start difference. First operand 13943 states and 19971 transitions. Second operand 11 states. [2020-10-27 05:38:29,006 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:38:32,489 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-27 05:38:32,706 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:38:33,111 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 05:38:33,442 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:38:53,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:53,020 INFO L93 Difference]: Finished difference Result 78877 states and 113204 transitions. [2020-10-27 05:38:53,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 05:38:53,021 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2020-10-27 05:38:53,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:53,102 INFO L225 Difference]: With dead ends: 78877 [2020-10-27 05:38:53,103 INFO L226 Difference]: Without dead ends: 67154 [2020-10-27 05:38:53,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2020-10-27 05:38:53,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67154 states. [2020-10-27 05:38:59,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67154 to 18436. [2020-10-27 05:38:59,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18436 states. [2020-10-27 05:38:59,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18436 states to 18436 states and 26400 transitions. [2020-10-27 05:38:59,034 INFO L78 Accepts]: Start accepts. Automaton has 18436 states and 26400 transitions. Word has length 79 [2020-10-27 05:38:59,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:59,035 INFO L481 AbstractCegarLoop]: Abstraction has 18436 states and 26400 transitions. [2020-10-27 05:38:59,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:38:59,035 INFO L276 IsEmpty]: Start isEmpty. Operand 18436 states and 26400 transitions. [2020-10-27 05:38:59,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 05:38:59,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:59,040 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 05:38:59,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 05:38:59,040 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:59,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:59,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1404428897, now seen corresponding path program 1 times [2020-10-27 05:38:59,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:59,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094608732] [2020-10-27 05:38:59,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:59,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:59,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:59,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:59,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:59,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 05:38:59,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:38:59,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 647 [2020-10-27 05:38:59,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:59,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:38:59,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:38:59,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 05:38:59,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:00,142 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:39:00,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:39:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:00,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:00,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:00,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:39:00,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:39:00,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:39:00,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:00,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:39:00,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:39:00,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:39:00,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:00,176 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 05:39:00,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094608732] [2020-10-27 05:39:00,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:39:00,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:39:00,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619958117] [2020-10-27 05:39:00,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:39:00,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:39:00,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:39:00,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:39:00,178 INFO L87 Difference]: Start difference. First operand 18436 states and 26400 transitions. Second operand 11 states. [2020-10-27 05:39:00,412 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-27 05:39:02,761 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 05:39:03,110 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-27 05:39:03,346 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-27 05:39:03,662 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 05:39:07,348 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 05:39:20,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:39:20,208 INFO L93 Difference]: Finished difference Result 66822 states and 95858 transitions. [2020-10-27 05:39:20,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 05:39:20,209 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 80 [2020-10-27 05:39:20,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:39:20,269 INFO L225 Difference]: With dead ends: 66822 [2020-10-27 05:39:20,269 INFO L226 Difference]: Without dead ends: 52219 [2020-10-27 05:39:20,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-10-27 05:39:20,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52219 states. [2020-10-27 05:39:26,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52219 to 19830. [2020-10-27 05:39:26,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19830 states. [2020-10-27 05:39:26,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19830 states to 19830 states and 28330 transitions. [2020-10-27 05:39:26,388 INFO L78 Accepts]: Start accepts. Automaton has 19830 states and 28330 transitions. Word has length 80 [2020-10-27 05:39:26,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:39:26,388 INFO L481 AbstractCegarLoop]: Abstraction has 19830 states and 28330 transitions. [2020-10-27 05:39:26,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:39:26,388 INFO L276 IsEmpty]: Start isEmpty. Operand 19830 states and 28330 transitions. [2020-10-27 05:39:26,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 05:39:26,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:39:26,391 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 05:39:26,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 05:39:26,392 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:39:26,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:39:26,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1810185401, now seen corresponding path program 1 times [2020-10-27 05:39:26,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:39:26,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057328656] [2020-10-27 05:39:26,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:39:26,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:26,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:26,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:26,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 05:39:26,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:39:26,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-27 05:39:26,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:26,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:39:26,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-27 05:39:26,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 05:39:26,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:26,735 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:39:26,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:39:26,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:26,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:26,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:26,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:39:26,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:39:26,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:39:26,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:26,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:39:26,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:39:26,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:39:26,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:26,757 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 05:39:26,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057328656] [2020-10-27 05:39:26,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:39:26,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:39:26,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104597378] [2020-10-27 05:39:26,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:39:26,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:39:26,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:39:26,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:39:26,758 INFO L87 Difference]: Start difference. First operand 19830 states and 28330 transitions. Second operand 6 states. [2020-10-27 05:39:41,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:39:41,501 INFO L93 Difference]: Finished difference Result 42438 states and 59465 transitions. [2020-10-27 05:39:41,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:39:41,502 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-10-27 05:39:41,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:39:41,552 INFO L225 Difference]: With dead ends: 42438 [2020-10-27 05:39:41,553 INFO L226 Difference]: Without dead ends: 42435 [2020-10-27 05:39:41,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:39:41,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42435 states. [2020-10-27 05:39:48,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42435 to 21594. [2020-10-27 05:39:48,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21594 states. [2020-10-27 05:39:48,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21594 states to 21594 states and 30094 transitions. [2020-10-27 05:39:48,607 INFO L78 Accepts]: Start accepts. Automaton has 21594 states and 30094 transitions. Word has length 80 [2020-10-27 05:39:48,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:39:48,607 INFO L481 AbstractCegarLoop]: Abstraction has 21594 states and 30094 transitions. [2020-10-27 05:39:48,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:39:48,607 INFO L276 IsEmpty]: Start isEmpty. Operand 21594 states and 30094 transitions. [2020-10-27 05:39:48,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:39:48,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:39:48,610 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 05:39:48,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 05:39:48,611 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:39:48,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:39:48,611 INFO L82 PathProgramCache]: Analyzing trace with hash 137710583, now seen corresponding path program 1 times [2020-10-27 05:39:48,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:39:48,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806889240] [2020-10-27 05:39:48,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:39:48,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:48,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:48,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:48,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:48,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:39:48,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:39:48,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-27 05:39:48,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:48,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:39:48,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:39:48,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 05:39:48,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:49,003 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:39:49,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:39:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:49,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:49,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:49,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:39:49,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:39:49,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:39:49,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:49,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:39:49,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:39:49,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:39:49,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:49,041 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 05:39:49,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806889240] [2020-10-27 05:39:49,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:39:49,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:39:49,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780723222] [2020-10-27 05:39:49,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:39:49,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:39:49,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:39:49,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:39:49,043 INFO L87 Difference]: Start difference. First operand 21594 states and 30094 transitions. Second operand 5 states. [2020-10-27 05:39:49,249 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:39:54,096 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 144