/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:07:12,733 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:07:12,738 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:07:12,801 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:07:12,801 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:07:12,808 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:07:12,810 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:07:12,815 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:07:12,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:07:12,827 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:07:12,828 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:07:12,830 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:07:12,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:07:12,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:07:12,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:07:12,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:07:12,839 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:07:12,844 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:07:12,853 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:07:12,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:07:12,863 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:07:12,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:07:12,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:07:12,870 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:07:12,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:07:12,882 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:07:12,883 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:07:12,886 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:07:12,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:07:12,888 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:07:12,888 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:07:12,889 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:07:12,891 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:07:12,892 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:07:12,893 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:07:12,893 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:07:12,894 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:07:12,894 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:07:12,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:07:12,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:07:12,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:07:12,905 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 00:07:12,959 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:07:12,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:07:12,963 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:07:12,963 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:07:12,964 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:07:12,964 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:07:12,964 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:07:12,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:07:12,965 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:07:12,965 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:07:12,966 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:07:12,966 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:07:12,966 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:07:12,967 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:07:12,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:07:12,967 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:07:12,967 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:07:12,967 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:07:12,968 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:07:12,968 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:07:12,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:07:12,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:07:12,968 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:07:12,969 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:07:12,969 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:07:12,969 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:07:12,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:07:12,969 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:07:12,970 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:07:12,970 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:07:13,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:07:13,409 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:07:13,415 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:07:13,416 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:07:13,417 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:07:13,418 INFO L432 ainManager$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.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 00:07:13,487 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/035080113/512e8faef8924690a3a1dda839e83a15/FLAG73ca0aefb [2020-10-28 00:07:14,104 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:07:14,105 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 00:07:14,125 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/035080113/512e8faef8924690a3a1dda839e83a15/FLAG73ca0aefb [2020-10-28 00:07:14,424 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/035080113/512e8faef8924690a3a1dda839e83a15 [2020-10-28 00:07:14,429 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:07:14,445 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:07:14,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:07:14,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:07:14,453 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:07:14,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:07:14" (1/1) ... [2020-10-28 00:07:14,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11bf5649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:14, skipping insertion in model container [2020-10-28 00:07:14,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:07:14" (1/1) ... [2020-10-28 00:07:14,473 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:07:14,536 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:07:14,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:07:14,776 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:07:14,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:07:14,854 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:07:14,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:14 WrapperNode [2020-10-28 00:07:14,854 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:07:14,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:07:14,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:07:14,856 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:07:14,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:14" (1/1) ... [2020-10-28 00:07:14,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:14" (1/1) ... [2020-10-28 00:07:14,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:14" (1/1) ... [2020-10-28 00:07:14,883 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:14" (1/1) ... [2020-10-28 00:07:14,895 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:14" (1/1) ... [2020-10-28 00:07:14,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:14" (1/1) ... [2020-10-28 00:07:14,905 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:14" (1/1) ... [2020-10-28 00:07:14,910 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:07:14,911 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:07:14,911 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:07:14,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:07:14,912 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:07:14,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:07:14,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:07:14,981 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:07:14,981 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:07:14,981 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:07:14,982 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:07:14,982 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:07:14,982 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:07:14,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:07:14,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:07:14,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:07:14,983 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:07:14,983 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:07:14,983 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:07:14,983 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:07:14,983 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:07:14,983 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:07:14,984 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:07:14,984 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:07:14,984 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:07:14,984 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:07:14,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:07:14,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:07:14,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:07:14,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:07:14,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:07:14,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:07:15,820 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:07:15,820 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:07:15,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:07:15 BoogieIcfgContainer [2020-10-28 00:07:15,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:07:15,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:07:15,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:07:15,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:07:15,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:07:14" (1/3) ... [2020-10-28 00:07:15,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@daee958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:07:15, skipping insertion in model container [2020-10-28 00:07:15,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:14" (2/3) ... [2020-10-28 00:07:15,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@daee958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:07:15, skipping insertion in model container [2020-10-28 00:07:15,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:07:15" (3/3) ... [2020-10-28 00:07:15,831 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 00:07:15,843 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:07:15,848 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:07:15,861 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:07:15,888 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:07:15,889 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:07:15,889 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:07:15,889 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:07:15,889 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:07:15,889 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:07:15,890 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:07:15,890 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:07:15,908 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states. [2020-10-28 00:07:15,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 00:07:15,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:15,917 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] [2020-10-28 00:07:15,918 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:15,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:15,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1066806879, now seen corresponding path program 1 times [2020-10-28 00:07:15,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:15,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137684949] [2020-10-28 00:07:15,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:16,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:16,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:16,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:16,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:18,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:18,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 00:07:18,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 00:07:18,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2563 [2020-10-28 00:07:18,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:18,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:07:18,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 00:07:18,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 00:07:18,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 00:07:19,015 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:07:19,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:19,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:19,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:19,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:19,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:19,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:07:19,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:19,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:19,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:19,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:19,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:19,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137684949] [2020-10-28 00:07:19,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:19,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:07:19,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588978234] [2020-10-28 00:07:19,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:07:19,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:19,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:07:19,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:07:19,090 INFO L87 Difference]: Start difference. First operand 94 states. Second operand 4 states. [2020-10-28 00:07:19,337 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 00:07:19,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:19,907 INFO L93 Difference]: Finished difference Result 212 states and 333 transitions. [2020-10-28 00:07:19,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:07:19,910 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-28 00:07:19,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:19,927 INFO L225 Difference]: With dead ends: 212 [2020-10-28 00:07:19,927 INFO L226 Difference]: Without dead ends: 134 [2020-10-28 00:07:19,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:07:19,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-28 00:07:19,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2020-10-28 00:07:20,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-28 00:07:20,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 193 transitions. [2020-10-28 00:07:20,005 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 193 transitions. Word has length 42 [2020-10-28 00:07:20,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:20,005 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 193 transitions. [2020-10-28 00:07:20,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:07:20,006 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 193 transitions. [2020-10-28 00:07:20,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 00:07:20,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:20,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:07:20,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:07:20,009 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:20,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:20,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1738608199, now seen corresponding path program 1 times [2020-10-28 00:07:20,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:20,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156845297] [2020-10-28 00:07:20,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:20,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:20,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:20,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:20,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:20,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:20,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 00:07:20,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 00:07:20,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 834 [2020-10-28 00:07:20,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:20,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:07:20,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 00:07:20,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 00:07:20,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:21,065 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:07:21,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:21,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:21,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:21,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:21,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:21,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:07:21,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:21,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:21,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:21,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:21,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:21,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:21,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156845297] [2020-10-28 00:07:21,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:21,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:07:21,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888796178] [2020-10-28 00:07:21,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:07:21,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:21,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:07:21,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:07:21,099 INFO L87 Difference]: Start difference. First operand 131 states and 193 transitions. Second operand 4 states. [2020-10-28 00:07:21,283 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 00:07:21,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:21,647 INFO L93 Difference]: Finished difference Result 313 states and 479 transitions. [2020-10-28 00:07:21,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:07:21,648 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-28 00:07:21,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:21,650 INFO L225 Difference]: With dead ends: 313 [2020-10-28 00:07:21,651 INFO L226 Difference]: Without dead ends: 206 [2020-10-28 00:07:21,652 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 [2020-10-28 00:07:21,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-28 00:07:21,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 203. [2020-10-28 00:07:21,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-28 00:07:21,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 306 transitions. [2020-10-28 00:07:21,688 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 306 transitions. Word has length 43 [2020-10-28 00:07:21,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:21,688 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 306 transitions. [2020-10-28 00:07:21,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:07:21,689 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 306 transitions. [2020-10-28 00:07:21,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 00:07:21,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:21,692 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] [2020-10-28 00:07:21,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:07:21,693 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:21,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:21,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1753338934, now seen corresponding path program 1 times [2020-10-28 00:07:21,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:21,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378952300] [2020-10-28 00:07:21,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:21,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:21,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:21,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:22,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:22,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 00:07:22,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:07:22,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 474 [2020-10-28 00:07:22,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:22,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:07:22,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 00:07:22,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 00:07:22,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:22,382 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:07:22,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:22,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:22,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:22,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:22,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:22,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:22,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:07:22,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:22,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:22,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:22,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:22,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:22,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:22,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378952300] [2020-10-28 00:07:22,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:22,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:07:22,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469138957] [2020-10-28 00:07:22,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:07:22,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:22,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:07:22,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:07:22,424 INFO L87 Difference]: Start difference. First operand 203 states and 306 transitions. Second operand 4 states. [2020-10-28 00:07:22,581 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 00:07:23,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:23,068 INFO L93 Difference]: Finished difference Result 497 states and 766 transitions. [2020-10-28 00:07:23,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:07:23,068 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-28 00:07:23,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:23,073 INFO L225 Difference]: With dead ends: 497 [2020-10-28 00:07:23,073 INFO L226 Difference]: Without dead ends: 318 [2020-10-28 00:07:23,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:07:23,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-28 00:07:23,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 315. [2020-10-28 00:07:23,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-10-28 00:07:23,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 478 transitions. [2020-10-28 00:07:23,141 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 478 transitions. Word has length 44 [2020-10-28 00:07:23,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:23,142 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 478 transitions. [2020-10-28 00:07:23,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:07:23,142 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 478 transitions. [2020-10-28 00:07:23,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 00:07:23,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:23,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:07:23,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:07:23,145 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:23,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:23,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1266061178, now seen corresponding path program 1 times [2020-10-28 00:07:23,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:23,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351414979] [2020-10-28 00:07:23,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:23,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:23,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:23,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:23,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 00:07:23,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:07:23,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 714 [2020-10-28 00:07:23,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:23,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:07:23,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 00:07:23,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 00:07:23,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:07:24,112 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:07:24,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:24,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:24,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:24,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:24,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:24,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:24,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:07:24,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:24,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:24,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:24,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:24,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:24,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:24,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351414979] [2020-10-28 00:07:24,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:24,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:07:24,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749824272] [2020-10-28 00:07:24,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:07:24,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:24,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:07:24,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:07:24,144 INFO L87 Difference]: Start difference. First operand 315 states and 478 transitions. Second operand 6 states. [2020-10-28 00:07:24,310 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:07:24,830 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:07:25,019 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 00:07:25,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:25,094 INFO L93 Difference]: Finished difference Result 1479 states and 2294 transitions. [2020-10-28 00:07:25,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 00:07:25,095 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-28 00:07:25,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:25,102 INFO L225 Difference]: With dead ends: 1479 [2020-10-28 00:07:25,103 INFO L226 Difference]: Without dead ends: 1188 [2020-10-28 00:07:25,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:07:25,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2020-10-28 00:07:25,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 603. [2020-10-28 00:07:25,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-10-28 00:07:25,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 914 transitions. [2020-10-28 00:07:25,164 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 914 transitions. Word has length 45 [2020-10-28 00:07:25,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:25,164 INFO L481 AbstractCegarLoop]: Abstraction has 603 states and 914 transitions. [2020-10-28 00:07:25,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:07:25,164 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 914 transitions. [2020-10-28 00:07:25,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 00:07:25,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:25,166 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] [2020-10-28 00:07:25,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:07:25,166 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:25,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:25,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1167890461, now seen corresponding path program 1 times [2020-10-28 00:07:25,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:25,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552871518] [2020-10-28 00:07:25,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:25,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:25,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:25,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:25,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:25,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 00:07:25,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:07:25,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 346 [2020-10-28 00:07:25,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:25,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:07:25,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 00:07:25,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:07:25,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:25,760 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:07:25,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:25,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:25,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:25,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:25,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:25,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:25,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:07:25,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:25,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:25,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:25,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:25,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:25,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:25,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552871518] [2020-10-28 00:07:25,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:25,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:07:25,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491895870] [2020-10-28 00:07:25,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:07:25,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:25,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:07:25,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:07:25,792 INFO L87 Difference]: Start difference. First operand 603 states and 914 transitions. Second operand 5 states. [2020-10-28 00:07:26,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:26,408 INFO L93 Difference]: Finished difference Result 1214 states and 1836 transitions. [2020-10-28 00:07:26,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:07:26,409 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-10-28 00:07:26,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:26,416 INFO L225 Difference]: With dead ends: 1214 [2020-10-28 00:07:26,416 INFO L226 Difference]: Without dead ends: 1211 [2020-10-28 00:07:26,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:07:26,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2020-10-28 00:07:26,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 635. [2020-10-28 00:07:26,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2020-10-28 00:07:26,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 946 transitions. [2020-10-28 00:07:26,494 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 946 transitions. Word has length 46 [2020-10-28 00:07:26,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:26,495 INFO L481 AbstractCegarLoop]: Abstraction has 635 states and 946 transitions. [2020-10-28 00:07:26,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:07:26,495 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 946 transitions. [2020-10-28 00:07:26,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 00:07:26,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:26,496 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] [2020-10-28 00:07:26,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:07:26,497 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:26,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:26,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1546838185, now seen corresponding path program 1 times [2020-10-28 00:07:26,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:26,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257046250] [2020-10-28 00:07:26,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:26,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:26,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:26,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:26,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 00:07:26,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:07:26,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 384 [2020-10-28 00:07:26,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:26,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:07:26,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 00:07:26,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:07:26,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:27,117 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:07:27,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:27,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:27,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:27,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:27,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:27,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:07:27,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:27,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:27,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:27,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:27,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:27,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:27,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257046250] [2020-10-28 00:07:27,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:27,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:07:27,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837397615] [2020-10-28 00:07:27,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:07:27,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:27,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:07:27,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:07:27,155 INFO L87 Difference]: Start difference. First operand 635 states and 946 transitions. Second operand 6 states. [2020-10-28 00:07:27,703 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 00:07:27,912 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 00:07:28,116 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:07:28,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:28,666 INFO L93 Difference]: Finished difference Result 2204 states and 3280 transitions. [2020-10-28 00:07:28,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 00:07:28,667 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-28 00:07:28,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:28,676 INFO L225 Difference]: With dead ends: 2204 [2020-10-28 00:07:28,676 INFO L226 Difference]: Without dead ends: 1593 [2020-10-28 00:07:28,679 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 [2020-10-28 00:07:28,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2020-10-28 00:07:28,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1587. [2020-10-28 00:07:28,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1587 states. [2020-10-28 00:07:28,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 2338 transitions. [2020-10-28 00:07:28,852 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 2338 transitions. Word has length 47 [2020-10-28 00:07:28,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:28,852 INFO L481 AbstractCegarLoop]: Abstraction has 1587 states and 2338 transitions. [2020-10-28 00:07:28,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:07:28,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 2338 transitions. [2020-10-28 00:07:28,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 00:07:28,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:28,854 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:07:28,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:07:28,854 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:28,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:28,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1008225408, now seen corresponding path program 1 times [2020-10-28 00:07:28,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:28,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054068884] [2020-10-28 00:07:28,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:28,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:28,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:29,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:29,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 00:07:29,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:07:29,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 355 [2020-10-28 00:07:29,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:29,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:07:29,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:07:29,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 00:07:29,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:29,422 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:07:29,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:29,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:29,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:29,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:29,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:29,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:07:29,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:29,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:29,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:29,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:29,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:29,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:29,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054068884] [2020-10-28 00:07:29,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:29,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:07:29,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499463527] [2020-10-28 00:07:29,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:07:29,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:29,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:07:29,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:07:29,453 INFO L87 Difference]: Start difference. First operand 1587 states and 2338 transitions. Second operand 4 states. [2020-10-28 00:07:29,646 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:07:30,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:30,220 INFO L93 Difference]: Finished difference Result 3823 states and 5644 transitions. [2020-10-28 00:07:30,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:07:30,220 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-10-28 00:07:30,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:30,232 INFO L225 Difference]: With dead ends: 3823 [2020-10-28 00:07:30,232 INFO L226 Difference]: Without dead ends: 2260 [2020-10-28 00:07:30,236 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 [2020-10-28 00:07:30,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2020-10-28 00:07:30,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 2257. [2020-10-28 00:07:30,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2257 states. [2020-10-28 00:07:30,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3308 transitions. [2020-10-28 00:07:30,482 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3308 transitions. Word has length 49 [2020-10-28 00:07:30,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:30,483 INFO L481 AbstractCegarLoop]: Abstraction has 2257 states and 3308 transitions. [2020-10-28 00:07:30,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:07:30,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3308 transitions. [2020-10-28 00:07:30,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 00:07:30,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:30,486 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:07:30,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:07:30,487 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:30,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:30,487 INFO L82 PathProgramCache]: Analyzing trace with hash 384979062, now seen corresponding path program 1 times [2020-10-28 00:07:30,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:30,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666645048] [2020-10-28 00:07:30,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:30,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:30,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:30,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:31,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:31,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 00:07:31,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:07:31,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 600 [2020-10-28 00:07:31,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:31,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:07:31,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:07:31,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 00:07:31,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:31,342 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:07:31,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:31,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:31,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:31,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:31,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:31,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:07:31,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:31,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:31,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:31,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:31,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 00:07:31,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666645048] [2020-10-28 00:07:31,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:07:31,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 00:07:31,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438790821] [2020-10-28 00:07:31,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:07:31,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:31,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:07:31,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:07:31,389 INFO L87 Difference]: Start difference. First operand 2257 states and 3308 transitions. Second operand 5 states. [2020-10-28 00:07:31,585 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:07:32,151 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:07:32,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:32,425 INFO L93 Difference]: Finished difference Result 5274 states and 7762 transitions. [2020-10-28 00:07:32,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:07:32,426 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-28 00:07:32,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:32,445 INFO L225 Difference]: With dead ends: 5274 [2020-10-28 00:07:32,446 INFO L226 Difference]: Without dead ends: 3711 [2020-10-28 00:07:32,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:07:32,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3711 states. [2020-10-28 00:07:32,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3711 to 3705. [2020-10-28 00:07:32,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3705 states. [2020-10-28 00:07:32,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3705 states to 3705 states and 5396 transitions. [2020-10-28 00:07:32,777 INFO L78 Accepts]: Start accepts. Automaton has 3705 states and 5396 transitions. Word has length 66 [2020-10-28 00:07:32,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:32,777 INFO L481 AbstractCegarLoop]: Abstraction has 3705 states and 5396 transitions. [2020-10-28 00:07:32,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:07:32,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3705 states and 5396 transitions. [2020-10-28 00:07:32,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 00:07:32,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:32,780 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:07:32,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:07:32,781 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:32,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:32,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1298422571, now seen corresponding path program 1 times [2020-10-28 00:07:32,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:32,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475786772] [2020-10-28 00:07:32,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:32,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:32,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:32,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:32,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:32,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:33,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:33,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:34,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:37,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:37,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:37,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 00:07:37,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:07:37,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:07:37,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:37,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:07:37,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 00:07:37,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 00:07:37,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:07:37,997 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:07:37,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:38,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:38,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:38,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:38,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:38,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:07:38,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:38,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:38,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:38,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:38,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:38,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:38,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475786772] [2020-10-28 00:07:38,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:38,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:07:38,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782074207] [2020-10-28 00:07:38,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:07:38,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:38,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:07:38,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:07:38,034 INFO L87 Difference]: Start difference. First operand 3705 states and 5396 transitions. Second operand 4 states. [2020-10-28 00:07:38,227 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 00:07:39,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:39,089 INFO L93 Difference]: Finished difference Result 8162 states and 11881 transitions. [2020-10-28 00:07:39,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:07:39,089 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-28 00:07:39,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:39,117 INFO L225 Difference]: With dead ends: 8162 [2020-10-28 00:07:39,117 INFO L226 Difference]: Without dead ends: 5487 [2020-10-28 00:07:39,125 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 [2020-10-28 00:07:39,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5487 states. [2020-10-28 00:07:39,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5487 to 5116. [2020-10-28 00:07:39,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5116 states. [2020-10-28 00:07:39,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5116 states to 5116 states and 7357 transitions. [2020-10-28 00:07:39,586 INFO L78 Accepts]: Start accepts. Automaton has 5116 states and 7357 transitions. Word has length 67 [2020-10-28 00:07:39,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:39,587 INFO L481 AbstractCegarLoop]: Abstraction has 5116 states and 7357 transitions. [2020-10-28 00:07:39,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:07:39,587 INFO L276 IsEmpty]: Start isEmpty. Operand 5116 states and 7357 transitions. [2020-10-28 00:07:39,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 00:07:39,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:39,590 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:07:39,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:07:39,590 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:39,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:39,591 INFO L82 PathProgramCache]: Analyzing trace with hash 789535852, now seen corresponding path program 1 times [2020-10-28 00:07:39,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:39,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183244188] [2020-10-28 00:07:39,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:39,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:39,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:39,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:39,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:39,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:40,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:41,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:44,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:44,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 00:07:44,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:07:44,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 00:07:44,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:44,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:07:44,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:07:44,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 00:07:44,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:44,920 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:07:44,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:44,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:44,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:44,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:44,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:44,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:44,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:07:44,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:44,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:44,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:44,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:44,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:07:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:44,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183244188] [2020-10-28 00:07:44,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:44,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:07:44,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609836999] [2020-10-28 00:07:44,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:07:44,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:44,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:07:44,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:07:44,968 INFO L87 Difference]: Start difference. First operand 5116 states and 7357 transitions. Second operand 4 states. [2020-10-28 00:07:45,228 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 00:07:46,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:46,011 INFO L93 Difference]: Finished difference Result 8622 states and 12313 transitions. [2020-10-28 00:07:46,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:07:46,012 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-28 00:07:46,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:46,040 INFO L225 Difference]: With dead ends: 8622 [2020-10-28 00:07:46,041 INFO L226 Difference]: Without dead ends: 5437 [2020-10-28 00:07:46,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:07:46,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5437 states. [2020-10-28 00:07:46,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5437 to 5261. [2020-10-28 00:07:46,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5261 states. [2020-10-28 00:07:46,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 7396 transitions. [2020-10-28 00:07:46,493 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 7396 transitions. Word has length 67 [2020-10-28 00:07:46,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:46,494 INFO L481 AbstractCegarLoop]: Abstraction has 5261 states and 7396 transitions. [2020-10-28 00:07:46,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:07:46,494 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 7396 transitions. [2020-10-28 00:07:46,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 00:07:46,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:46,497 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:07:46,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:07:46,497 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:46,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:46,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1583880788, now seen corresponding path program 1 times [2020-10-28 00:07:46,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:46,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386959307] [2020-10-28 00:07:46,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:46,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:46,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:46,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:46,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:46,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:47,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:49,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:49,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 00:07:49,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:07:49,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3210 [2020-10-28 00:07:49,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:49,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:07:49,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:07:49,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 00:07:49,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:49,952 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:07:49,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:49,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:49,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:49,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:49,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:49,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:07:49,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:49,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:49,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:49,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:49,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:49,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:49,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386959307] [2020-10-28 00:07:49,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:07:49,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:07:49,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899887940] [2020-10-28 00:07:49,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:07:49,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:49,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:07:49,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:07:49,994 INFO L87 Difference]: Start difference. First operand 5261 states and 7396 transitions. Second operand 6 states. [2020-10-28 00:07:50,772 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:07:51,012 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:07:51,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:51,500 INFO L93 Difference]: Finished difference Result 13160 states and 18265 transitions. [2020-10-28 00:07:51,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:07:51,501 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-28 00:07:51,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:51,547 INFO L225 Difference]: With dead ends: 13160 [2020-10-28 00:07:51,547 INFO L226 Difference]: Without dead ends: 7949 [2020-10-28 00:07:51,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:07:51,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7949 states. [2020-10-28 00:07:52,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7949 to 5405. [2020-10-28 00:07:52,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5405 states. [2020-10-28 00:07:52,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5405 states to 5405 states and 7402 transitions. [2020-10-28 00:07:52,050 INFO L78 Accepts]: Start accepts. Automaton has 5405 states and 7402 transitions. Word has length 67 [2020-10-28 00:07:52,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:52,050 INFO L481 AbstractCegarLoop]: Abstraction has 5405 states and 7402 transitions. [2020-10-28 00:07:52,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:07:52,051 INFO L276 IsEmpty]: Start isEmpty. Operand 5405 states and 7402 transitions. [2020-10-28 00:07:52,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 00:07:52,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:52,060 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:07:52,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:07:52,060 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:52,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:52,061 INFO L82 PathProgramCache]: Analyzing trace with hash -333576509, now seen corresponding path program 1 times [2020-10-28 00:07:52,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:52,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616932963] [2020-10-28 00:07:52,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:52,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:52,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:52,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:52,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:52,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:54,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:54,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 00:07:54,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:07:54,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2723 [2020-10-28 00:07:54,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:54,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:07:54,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:07:54,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:07:54,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:55,013 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:07:55,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:55,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:55,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:55,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:55,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:55,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:55,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:07:55,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:55,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:55,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:55,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:55,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:55,044 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:55,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616932963] [2020-10-28 00:07:55,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:07:55,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:07:55,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607245069] [2020-10-28 00:07:55,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:07:55,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:55,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:07:55,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:07:55,047 INFO L87 Difference]: Start difference. First operand 5405 states and 7402 transitions. Second operand 6 states. [2020-10-28 00:07:55,981 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:07:56,200 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:07:57,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:57,014 INFO L93 Difference]: Finished difference Result 19947 states and 27196 transitions. [2020-10-28 00:07:57,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:07:57,015 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-28 00:07:57,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:57,047 INFO L225 Difference]: With dead ends: 19947 [2020-10-28 00:07:57,047 INFO L226 Difference]: Without dead ends: 14574 [2020-10-28 00:07:57,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:07:57,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14574 states. [2020-10-28 00:07:57,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14574 to 7366. [2020-10-28 00:07:57,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7366 states. [2020-10-28 00:07:57,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7366 states to 7366 states and 9840 transitions. [2020-10-28 00:07:57,829 INFO L78 Accepts]: Start accepts. Automaton has 7366 states and 9840 transitions. Word has length 67 [2020-10-28 00:07:57,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:57,829 INFO L481 AbstractCegarLoop]: Abstraction has 7366 states and 9840 transitions. [2020-10-28 00:07:57,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:07:57,829 INFO L276 IsEmpty]: Start isEmpty. Operand 7366 states and 9840 transitions. [2020-10-28 00:07:57,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 00:07:57,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:57,833 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:07:57,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:07:57,833 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:57,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:57,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1946086804, now seen corresponding path program 1 times [2020-10-28 00:07:57,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:57,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425501655] [2020-10-28 00:07:57,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:57,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:57,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:57,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:58,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:58,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:00,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:00,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 00:08:00,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:08:00,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2371 [2020-10-28 00:08:00,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:00,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:08:00,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:08:00,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 00:08:00,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:00,440 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:08:00,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:00,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:00,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:00,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:00,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:00,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:00,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:08:00,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:00,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:00,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:00,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:00,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:00,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:00,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425501655] [2020-10-28 00:08:00,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:08:00,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:08:00,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147122926] [2020-10-28 00:08:00,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:08:00,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:00,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:08:00,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:08:00,473 INFO L87 Difference]: Start difference. First operand 7366 states and 9840 transitions. Second operand 6 states. [2020-10-28 00:08:01,384 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:08:01,639 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:08:02,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:02,549 INFO L93 Difference]: Finished difference Result 22732 states and 30131 transitions. [2020-10-28 00:08:02,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:08:02,557 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-28 00:08:02,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:02,594 INFO L225 Difference]: With dead ends: 22732 [2020-10-28 00:08:02,595 INFO L226 Difference]: Without dead ends: 15421 [2020-10-28 00:08:02,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:08:02,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15421 states. [2020-10-28 00:08:03,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15421 to 9108. [2020-10-28 00:08:03,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9108 states. [2020-10-28 00:08:03,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9108 states to 9108 states and 12010 transitions. [2020-10-28 00:08:03,656 INFO L78 Accepts]: Start accepts. Automaton has 9108 states and 12010 transitions. Word has length 67 [2020-10-28 00:08:03,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:03,656 INFO L481 AbstractCegarLoop]: Abstraction has 9108 states and 12010 transitions. [2020-10-28 00:08:03,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:08:03,656 INFO L276 IsEmpty]: Start isEmpty. Operand 9108 states and 12010 transitions. [2020-10-28 00:08:03,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 00:08:03,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:03,661 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:08:03,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:08:03,661 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:03,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:03,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1151741868, now seen corresponding path program 1 times [2020-10-28 00:08:03,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:03,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910577579] [2020-10-28 00:08:03,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:03,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:03,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:03,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:03,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:03,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:04,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:04,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:04,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:07,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:08,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:08,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 00:08:08,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:08:08,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 00:08:08,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:08,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:08:08,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 00:08:08,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 00:08:08,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:08,939 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:08:08,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:08,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:08,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:08,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:08,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:08,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:08,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 00:08:08,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:08,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:08,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:08,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:08,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:08,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:08,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910577579] [2020-10-28 00:08:08,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:08:08,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:08:08,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380130790] [2020-10-28 00:08:08,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:08:08,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:08,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:08:08,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:08:08,965 INFO L87 Difference]: Start difference. First operand 9108 states and 12010 transitions. Second operand 4 states. [2020-10-28 00:08:09,160 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 00:08:10,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:10,427 INFO L93 Difference]: Finished difference Result 19996 states and 26422 transitions. [2020-10-28 00:08:10,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:08:10,427 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-28 00:08:10,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:10,461 INFO L225 Difference]: With dead ends: 19996 [2020-10-28 00:08:10,461 INFO L226 Difference]: Without dead ends: 12993 [2020-10-28 00:08:10,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:08:10,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12993 states. [2020-10-28 00:08:11,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12993 to 12947. [2020-10-28 00:08:11,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12947 states. [2020-10-28 00:08:11,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12947 states to 12947 states and 16918 transitions. [2020-10-28 00:08:11,687 INFO L78 Accepts]: Start accepts. Automaton has 12947 states and 16918 transitions. Word has length 67 [2020-10-28 00:08:11,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:11,688 INFO L481 AbstractCegarLoop]: Abstraction has 12947 states and 16918 transitions. [2020-10-28 00:08:11,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:08:11,688 INFO L276 IsEmpty]: Start isEmpty. Operand 12947 states and 16918 transitions. [2020-10-28 00:08:11,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:08:11,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:11,694 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:08:11,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:08:11,695 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:11,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:11,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1485833580, now seen corresponding path program 1 times [2020-10-28 00:08:11,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:11,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724621171] [2020-10-28 00:08:11,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:11,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:11,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:11,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:11,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:11,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:11,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:12,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:13,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:14,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:14,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:14,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:14,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:14,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:16,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:16,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:08:16,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:08:16,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 00:08:16,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:16,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:08:16,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:08:16,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 00:08:16,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:17,201 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:08:17,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:17,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:17,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:17,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:17,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:17,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:08:17,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:17,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:17,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:17,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:17,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:17,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:17,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724621171] [2020-10-28 00:08:17,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:08:17,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 00:08:17,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632486678] [2020-10-28 00:08:17,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:08:17,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:17,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:08:17,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:08:17,249 INFO L87 Difference]: Start difference. First operand 12947 states and 16918 transitions. Second operand 11 states. [2020-10-28 00:08:17,479 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:08:20,392 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 00:08:20,876 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:08:25,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:25,878 INFO L93 Difference]: Finished difference Result 66282 states and 85276 transitions. [2020-10-28 00:08:25,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-28 00:08:25,879 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2020-10-28 00:08:25,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:25,962 INFO L225 Difference]: With dead ends: 66282 [2020-10-28 00:08:25,963 INFO L226 Difference]: Without dead ends: 53366 [2020-10-28 00:08:25,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=721, Invalid=3061, Unknown=0, NotChecked=0, Total=3782 [2020-10-28 00:08:26,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53366 states. [2020-10-28 00:08:27,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53366 to 15707. [2020-10-28 00:08:27,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15707 states. [2020-10-28 00:08:27,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15707 states to 15707 states and 20569 transitions. [2020-10-28 00:08:27,977 INFO L78 Accepts]: Start accepts. Automaton has 15707 states and 20569 transitions. Word has length 69 [2020-10-28 00:08:27,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:27,977 INFO L481 AbstractCegarLoop]: Abstraction has 15707 states and 20569 transitions. [2020-10-28 00:08:27,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:08:27,977 INFO L276 IsEmpty]: Start isEmpty. Operand 15707 states and 20569 transitions. [2020-10-28 00:08:27,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:08:27,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:27,983 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:08:27,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 00:08:27,986 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:27,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:27,987 INFO L82 PathProgramCache]: Analyzing trace with hash 667668221, now seen corresponding path program 1 times [2020-10-28 00:08:27,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:27,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360268822] [2020-10-28 00:08:27,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:28,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:28,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:28,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:28,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:28,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:28,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:29,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:29,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:29,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:31,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:31,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:31,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:31,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:31,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:33,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:33,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:08:33,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:08:33,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 00:08:33,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:33,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:08:33,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:08:33,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 00:08:33,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:33,348 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 22 [2020-10-28 00:08:33,577 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:08:33,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:33,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:33,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:33,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:33,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:33,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:08:33,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:33,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:33,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:33,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:33,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:33,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:33,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360268822] [2020-10-28 00:08:33,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:08:33,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 00:08:33,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107076173] [2020-10-28 00:08:33,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:08:33,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:33,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:08:33,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:08:33,614 INFO L87 Difference]: Start difference. First operand 15707 states and 20569 transitions. Second operand 11 states. [2020-10-28 00:08:33,901 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:08:36,682 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 00:08:37,102 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:08:39,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:39,620 INFO L93 Difference]: Finished difference Result 35678 states and 46364 transitions. [2020-10-28 00:08:39,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 00:08:39,620 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2020-10-28 00:08:39,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:39,665 INFO L225 Difference]: With dead ends: 35678 [2020-10-28 00:08:39,666 INFO L226 Difference]: Without dead ends: 29957 [2020-10-28 00:08:39,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=287, Invalid=1195, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 00:08:39,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29957 states. [2020-10-28 00:08:41,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29957 to 16483. [2020-10-28 00:08:41,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16483 states. [2020-10-28 00:08:41,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16483 states to 16483 states and 21605 transitions. [2020-10-28 00:08:41,556 INFO L78 Accepts]: Start accepts. Automaton has 16483 states and 21605 transitions. Word has length 69 [2020-10-28 00:08:41,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:41,556 INFO L481 AbstractCegarLoop]: Abstraction has 16483 states and 21605 transitions. [2020-10-28 00:08:41,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:08:41,556 INFO L276 IsEmpty]: Start isEmpty. Operand 16483 states and 21605 transitions. [2020-10-28 00:08:41,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:08:41,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:41,563 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:08:41,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 00:08:41,563 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:41,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:41,564 INFO L82 PathProgramCache]: Analyzing trace with hash -729287710, now seen corresponding path program 1 times [2020-10-28 00:08:41,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:41,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360013243] [2020-10-28 00:08:41,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:41,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:41,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:41,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:41,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:41,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:41,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:43,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:46,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:46,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:08:46,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:08:46,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:08:46,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:46,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:08:46,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 00:08:46,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 00:08:46,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:46,798 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:08:46,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:46,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:46,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:46,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:46,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:46,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:08:46,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:46,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:46,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:46,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:46,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:46,826 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 00:08:46,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360013243] [2020-10-28 00:08:46,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:08:46,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:08:46,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871658852] [2020-10-28 00:08:46,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:08:46,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:46,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:08:46,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:08:46,828 INFO L87 Difference]: Start difference. First operand 16483 states and 21605 transitions. Second operand 6 states. [2020-10-28 00:08:47,060 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 00:08:48,027 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:08:50,277 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-28 00:08:50,477 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 00:08:51,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:51,655 INFO L93 Difference]: Finished difference Result 44629 states and 59339 transitions. [2020-10-28 00:08:51,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:08:51,656 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-28 00:08:51,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:51,704 INFO L225 Difference]: With dead ends: 44629 [2020-10-28 00:08:51,705 INFO L226 Difference]: Without dead ends: 36483 [2020-10-28 00:08:51,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:08:51,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36483 states. [2020-10-28 00:08:54,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36483 to 24823. [2020-10-28 00:08:54,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24823 states. [2020-10-28 00:08:54,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24823 states to 24823 states and 32497 transitions. [2020-10-28 00:08:54,535 INFO L78 Accepts]: Start accepts. Automaton has 24823 states and 32497 transitions. Word has length 69 [2020-10-28 00:08:54,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:54,535 INFO L481 AbstractCegarLoop]: Abstraction has 24823 states and 32497 transitions. [2020-10-28 00:08:54,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:08:54,535 INFO L276 IsEmpty]: Start isEmpty. Operand 24823 states and 32497 transitions. [2020-10-28 00:08:54,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:08:54,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:54,542 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:08:54,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 00:08:54,543 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:54,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:54,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1821705519, now seen corresponding path program 1 times [2020-10-28 00:08:54,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:54,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027995911] [2020-10-28 00:08:54,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:54,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:54,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:54,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:54,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:54,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:54,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:55,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:56,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:59,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:59,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:08:59,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:08:59,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 00:08:59,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:59,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:08:59,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:08:59,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 00:08:59,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:59,782 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:08:59,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:59,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:59,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:59,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:59,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:59,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:59,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:08:59,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:59,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:59,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:59,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:59,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:59,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027995911] [2020-10-28 00:08:59,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:08:59,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:08:59,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516197966] [2020-10-28 00:08:59,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:08:59,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:59,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:08:59,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:08:59,805 INFO L87 Difference]: Start difference. First operand 24823 states and 32497 transitions. Second operand 6 states. [2020-10-28 00:08:59,998 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:09:01,398 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:09:01,711 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:09:11,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:11,902 INFO L93 Difference]: Finished difference Result 123294 states and 161146 transitions. [2020-10-28 00:09:11,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:09:11,902 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-28 00:09:11,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:12,048 INFO L225 Difference]: With dead ends: 123294 [2020-10-28 00:09:12,048 INFO L226 Difference]: Without dead ends: 98562 [2020-10-28 00:09:12,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:09:12,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98562 states. [2020-10-28 00:09:21,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98562 to 82269. [2020-10-28 00:09:21,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82269 states. [2020-10-28 00:09:21,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82269 states to 82269 states and 107424 transitions. [2020-10-28 00:09:21,560 INFO L78 Accepts]: Start accepts. Automaton has 82269 states and 107424 transitions. Word has length 69 [2020-10-28 00:09:21,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:21,560 INFO L481 AbstractCegarLoop]: Abstraction has 82269 states and 107424 transitions. [2020-10-28 00:09:21,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:09:21,560 INFO L276 IsEmpty]: Start isEmpty. Operand 82269 states and 107424 transitions. [2020-10-28 00:09:21,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:09:21,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:21,570 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:09:21,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 00:09:21,571 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:21,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:21,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1902845196, now seen corresponding path program 1 times [2020-10-28 00:09:21,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:21,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351692557] [2020-10-28 00:09:21,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:21,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:21,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:21,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:21,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:22,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:22,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:22,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:23,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:23,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:23,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:23,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:26,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:26,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:09:26,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:09:26,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:09:26,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:26,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 00:09:26,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:09:26,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 00:09:26,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:26,860 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 33 [2020-10-28 00:09:27,132 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:09:27,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:27,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:27,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:27,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:27,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:27,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:27,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:09:27,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:27,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:27,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:27,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:27,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:09:27,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351692557] [2020-10-28 00:09:27,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:09:27,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 00:09:27,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692555800] [2020-10-28 00:09:27,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 00:09:27,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:27,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 00:09:27,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:09:27,166 INFO L87 Difference]: Start difference. First operand 82269 states and 107424 transitions. Second operand 12 states. [2020-10-28 00:09:27,547 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:09:28,035 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-10-28 00:09:28,199 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-28 00:09:29,304 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-10-28 00:09:29,655 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-10-28 00:09:30,894 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-28 00:09:31,803 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 00:09:32,342 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:09:32,617 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 00:09:33,236 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 00:09:34,199 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-28 00:09:34,679 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-28 00:09:35,316 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-10-28 00:09:56,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:56,296 INFO L93 Difference]: Finished difference Result 225097 states and 287315 transitions. [2020-10-28 00:09:56,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-28 00:09:56,296 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2020-10-28 00:09:56,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:56,745 INFO L225 Difference]: With dead ends: 225097 [2020-10-28 00:09:56,745 INFO L226 Difference]: Without dead ends: 178742 [2020-10-28 00:09:56,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=493, Invalid=2699, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 00:09:56,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178742 states. [2020-10-28 00:10:07,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178742 to 82269. [2020-10-28 00:10:07,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82269 states. [2020-10-28 00:10:07,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82269 states to 82269 states and 107424 transitions. [2020-10-28 00:10:07,672 INFO L78 Accepts]: Start accepts. Automaton has 82269 states and 107424 transitions. Word has length 69 [2020-10-28 00:10:07,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:10:07,673 INFO L481 AbstractCegarLoop]: Abstraction has 82269 states and 107424 transitions. [2020-10-28 00:10:07,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 00:10:07,673 INFO L276 IsEmpty]: Start isEmpty. Operand 82269 states and 107424 transitions. [2020-10-28 00:10:07,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:10:07,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:10:07,681 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:10:07,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 00:10:07,681 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:10:07,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:10:07,682 INFO L82 PathProgramCache]: Analyzing trace with hash -622547069, now seen corresponding path program 1 times [2020-10-28 00:10:07,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:10:07,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281003954] [2020-10-28 00:10:07,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:10:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:07,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:07,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:07,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:07,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:08,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:08,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:08,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:08,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:08,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:08,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:08,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:08,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:09,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:12,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:12,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:10:12,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:10:12,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:10:12,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:12,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:10:12,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:10:12,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 00:10:12,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:13,032 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:10:13,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:10:13,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:13,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:13,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:13,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:10:13,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:10:13,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:10:13,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:13,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:10:13,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:10:13,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:10:13,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:13,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:10:13,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281003954] [2020-10-28 00:10:13,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:10:13,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 00:10:13,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796671611] [2020-10-28 00:10:13,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:10:13,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:10:13,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:10:13,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:10:13,061 INFO L87 Difference]: Start difference. First operand 82269 states and 107424 transitions. Second operand 11 states. [2020-10-28 00:10:13,323 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:10:15,928 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:10:16,386 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:10:19,909 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 00:10:43,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:10:43,147 INFO L93 Difference]: Finished difference Result 251618 states and 322027 transitions. [2020-10-28 00:10:43,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 00:10:43,148 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2020-10-28 00:10:43,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:10:43,649 INFO L225 Difference]: With dead ends: 251618 [2020-10-28 00:10:43,649 INFO L226 Difference]: Without dead ends: 209859 [2020-10-28 00:10:43,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=411, Invalid=1569, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 00:10:43,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209859 states.